Awoonga EAP Gladstone Area Water Board
Awoonga Dam Emergency Action Plan
September 2020
Awoonga Dam Emergency Action Plan
Contents Controlled Copy Distribution ...... 1 Document Control Sheet...... 2 Abbreviations & Acronyms...... 3 Glossary of Key Terms...... 4 Escalations / Activation Levels Summary ...... 5 1. INTRODUCTION ...... 6 1.1 Purpose ...... 6 1.2 Scope...... 6 1.3 Strategic Framework ...... 6 1.4 GAWB Emergency Resilience Framework...... 7 1.4.1 Emergency Management Plan ...... 7 1.4.2 Emergency Communications Plan and Contact List ...... 8 1.4.3 Cyclone Management Plan ...... 8 1.4.4 Security Risk Management Plan (Terrorism) ...... 8 1.5 Consultation Process ...... 8 1.6 Training and Exercises ...... 9 1.7 Community Education and Awareness Program ...... 10 1.8 Documentation and Reporting ...... 10 1.8.1 Incident Logs ...... 10 1.8.2 Post Event Reporting...... 10 1.8.3 Emergency Event Report ...... 10 1.9 Review Schedule ...... 11 2. Details of the Dam ...... 12 2.1 Dam Location ...... 12 2.2 Key Dam Details ...... 12 2.3 Population at Risk ...... 14 2.4 Access to Awoonga Dam ...... 14 2.5 Access around Awoonga Dam ...... 14 3. Roles and Responsibilities ...... 17 3.1 Entity Responsibilities...... 17 3.2 Incident Management Team ...... 18 3.2.1 Roles and Responsibilities ...... 19 3.2.2 Responsible Officers ...... 19 4. Hazards, Events and Impacts ...... 21 4.1 Dam Hazards ...... 21 4.2 Dam Hazard Events and Emergency Events ...... 21 4.3 Escalations ...... 21 4.4 Dam Hazard and Emergency Event Impacts ...... 22 4.4.1 Flood Event Impacts ...... 22 4.4.2 Non-Flood Event Impacts ...... 24
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5. Action Plans ...... 25 5.1 Safety...... 25 5.2 Equipment ...... 25 5.3 Action Plan 1: Flood Inflows ...... 25 5.3.1 Inspections and data review ...... 29 5.3.2 Water Level Prediction Model (WLPM) ...... 29 5.3.3 Individual Action Plans ...... 30 5.4 Action Plan 2: Loss of Containment (Main Embankment, Saddle Dams) ...... 37 5.4.1 Inspections and data review ...... 37 5.4.2 Individual Action Plans ...... 37 5.5 Action Plan 3: Loss of Containment (Taragoola) ...... 43 5.5.1 Inspections and data review ...... 43 5.5.2 Individual Action Plans ...... 45 5.6 Action Plan 4: Unusual Instrument Readings ...... 49 5.6.1 Inspections and data review ...... 49 5.6.2 Individual Action Plans ...... 49 5.7 Action Plan 5: Earthquake ...... 55 5.7.1 Inspections and data review ...... 55 5.7.2 Individual Action Plans ...... 55 5.8 Action Plan 6: Structural Damage ...... 61 5.8.1 Inspections and data review ...... 61 5.8.2 Individual Action Plans ...... 61 5.9 Action Plan 7: Terrorism ...... 67 5.9.1 Inspections and data review ...... 67 5.9.2 Individual Action Plans ...... 67 6. Communications ...... 73 6.1 Communications Protocols ...... 73 6.2 Notification Groups ...... 73 6.3 Communication Mechanisms ...... 75 7. Notification Tables ...... 78
Appendix A. Nominated and Delegated Officers Appendix B. Emergency Communication Plan & Contact Lists Appendix C. SDCC Emergency Alert Template & Procedures C.1 Emergency Alert Activation Procedures C.2 Emergency Alert Template C.3 Emergency Alert Polygon C.4 Emergency Alert Requestor Checklist Appendix D. Drawings and Technical Information D.1 General Arrangement: Drawing GN1002 D.2 Embankment Arrangement: Drawing EM1051
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D.3 Embankment Arrangement: Drawing EM1052 D.4 Spillway Concrete: Drawing SP1151 D.5 Spillway Right Abutment: Drawing SR1251 D.6 Saddle Dam No.3: Drawing 100-C-00051 and 100-C-00059 D.7 Saddle No.6 Auxiliary Spillway: Drawing 100-C-00077 and 100-C-00079 D.8 Spillway Rating Curve Appendix E. Forms Appendix F. Equipment List F.1 Personal items F.2 136 Goondoon St and Gladstone Water Treatment Plant F.3 Awoonga Dam Pump Station F.4 Awoonga Dam Recreation Area Workshop Appendix G. Affected Area Maps Appendix H. Emergency Event Report Template Appendix I. Notice
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Controlled Copy Distribution
Controlled Copy No
DRAFT, Uncontrolled Copy- Draft sent to DRMW for review
Controlled Copy Record
Copy No Position Location
1 Chief Operating Officer 136 Goondoon Street, Gladstone Gladstone Area Water Board
2 General Manager - Network 136 Goondoon Street, Gladstone Gladstone Area Water Board
3 Engineering Manager, 136 Goondoon Street, Gladstone Gladstone Area Water Board
4 Operational Assets and Dam Safety Supervisor 136 Goondoon St, Gladstone. Gladstone Area Water Board
5 Grounds and Catchment Supervisor Awoonga Dam Rangers Shed, Benaraby Gladstone Area Water Board
6 Risk and Compliance Manager 136 Goondoon St, Gladstone Gladstone Area Water Board
7 Library 136 Goondoon Street, Gladstone Gladstone Area Water Board
8 Awoonga Dam Pump Station Office Awoonga Dam Pump Station, Awwonga Dam Road, Gladstone Area Water Board Benaraby
9 Gladstone Area Water Treatment Plant Control Room Gladstone Water Treatment Plant, Bruce Street, Gladstone
10 Director, Dam Safety, Queensland Water Supply PO Box 15216, City East, QLD, 4002 Regulator, Department of Natural Resources, Mines and Energy (DNRME)
11 Local Disaster Management Group 101 Goondoon Street, Gladstone Gladstone Regional Council
12 District Disaster Coordinator 16 Yarroon Street, Gladstone Gladstone Police
13 Area Director, Level 4, Suncorp Building, Emergency Management Queensland 34 East Street PO Box 1397, Rockhampton, QLD, 4700
14 Director, Disaster Management Branch PO Box 1425, Brisbane, QLD, 4001 Emergency Management Queensland
15 District Officer Gladstone Police District 16 Yarroon Street, Gladstone
16 Tannum Sands Police Station Steel Street, Tannum Sands
17 Calliope Police Station 17 Bloomfield Street, Calliope
18 Manager, Taragoola Quarry Taragoola Quarry, Graymont, MS 24 Taragoola Road, Calliope, 4680
19 Civil Engineer, Dam Safety 136 Goondoon Street, Gladstone
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Document Control Sheet
Approvals
Revision / GAWB Endorsed GAWB CEO DNRME Approval Issue No
17 3 Revision, to be approved
18 1 Revision, to be approved
Revision Record
Revision No Issue No Revision Description Revision Date
1 1 Initial Issue 31 May 1995
2 1 Review Telephone and Notification List 17 April 1996
3 1 Amend Emergency Events and Actions 30 June 1996
4 1 Review Procedural Flow Chart 30 Nov 2000 Update Telephone and Radio Notification List Update Flood Alert Contacts Below Dam Review Flow Charts Section 5
5 Revision for FSL40 June 2002
6 Revision for FSL 40 1 April 2004
7 Revision of Complete Plan and Reissue November 2005
8 Revision of Complete Plan and Reissue October 2008
9 Revision of Complete Plan and Reissue August 2009 10 Update of Contact Lists November2010 11 Revision of Complete Plan and Reissue December2011
12 Revision of Complete Plan and Reissue October2012 13 Update Format to 2013 Provisional Guidelines September 2013 14 Update of AFC Upgrade Works Details and Mapping December2014
14 Update after comments June 2015
14 Draft for Approval August 2015 15 Update following comments from DEWS November2015 16 Full revision including updatefor revised legislative requirements June 2018 Draft prepared by JACOBSfor GRC/ LDMG& DDMG review
17 Draft sent to DRMWfor review August 2018 17 Minor changes sent to DNRMEfor review October2018 17 Minor changes sent to DNRMEfor review September 2019
18 EAP improvement Amendment and issue minor changes. Changes including September 2020 schedule of matters to consider dated 10/10/2018
GAWB Endorsed:
Signature: Date: Signature: Date: 2-"? "7 2A.2--0 -^'P-T^azo Civil Engineer - Dam Safety Engineering Manager GAWB Approved:
Date: Signature: >°l 0<^ ^.OSLO
Chief Executive O
Review Date - September 2020 Awoonga Dam Emergency Action Plan
Abbreviations & Acronyms
Abbreviation / Acronym Meaning
AEP Annual Exceedance Probability
AMTD Adopted Middle Thread Distance
ANCOLD Australian National Committee on Large Dams
AWD EAP Awoonga Dam Emergency Action Plan
BOM Bureau of Meteorology
CEO Chief Executive Officer
DDS Director Dam Safety
DDMG District Disaster Management Group
DDMP District Disaster Management Plan
DEWS (former) QLD Department of Energy and Water Supply
DNRME QLD Department of Natural Resources, Mines and Energy
DS Downstream
DSC Dam Safety Consultant
DSI Dam Site Inspector
EA Emergency Alert
EAP Emergency Action Plan
ECP Emergency Communication Plan
EER Emergency Event Report
EMP Emergency Management Plan
FE1 Flood Engineer 1
FE2 Flood Engineer 2
FSL Full Supply Volume
GAWB Gladstone Area Water Board
GRC Gladstone Regional Council
IC Incident Coordinator
IM Incident Manager
IMT Incident Management Team
LDMG Local Disaster Management Group
LDMP Local Disaster Management Plan
mAHD metres Australian Height Datum (elevation)
MMI Modified Mercalli Intensity
PAR Population at Risk
PMF Probable Maximum Flood
QFES Queensland Fire and Emergency Services
QPS Queensland Police Service
SDCC State Disaster Coordination Centre
SDMP State Disaster Management Plan
UHF Ultra-High Frequency
US Upstream
WLPM Water Level Prediction Model
WTP Water Treatment Plant
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Glossary of Key Terms
Definition Meaning
Activation Level The EAP follows four activation levels based on the scale and urgency of the event. These are: • Alert • Lean Forward • Stand Up • Stand Down
Dam Hazard For a dam, a reasonably foreseeable situation or condition that may— a) cause or contribute to the failure of the dam, if the failure may cause harm to persons or property; or b) require an automatic or controlled release of water from the dam, if the release of the water may cause harm to persons or property.
Dam Hazard Event For a dam, an event arising from a dam hazard if— a) persons or property may be harmed because of the event; and b) a coordinated response involving 2 or more relevant entities is unlikely to be required to respond to the event; and c) the event is not an emergency event.
Disaster A group established under the Disaster Management Act 2003, either local or district, where the area covered Management Group by the group may be affected by a dam hazard. Disaster A plan developed under the Disaster Management Act 2003, by a local or district disaster management Management Plan group. Emergency Event For a dam, an event arising from a dam hazard if— a) persons or property may be harmed because of the event; and b) any of the following apply— i. a coordinated response involving 2 or more of the relevant entities mentioned in paragraphs (b) to (d) of the definition relevant entity is likely to be required to respond to the event; ii. the event may arise because of a disaster situation declared under the Disaster Management Act; iii. an entity performing functions under the State disaster management plan may, under that plan, require the owner of the dam to give the entity information about the event. Emergency Event Report prepared by a dam owner following an emergency event consistent with the requirements of Section Report 352T - V of the Water Supply (Safety & Reliability) Act 2008. Evacuation Group The urgent immediate egress or escape of people away from an area that contains an imminent threat, an ongoing threat or a hazard to lives or property. Notification Group To be notified or warned of an impending event Referable Dam A dam is, or a proposed dam after its construction will be, a referable dam if— a) a failure impact assessment of the dam, or the proposed dam, is carried out under this part; and b) the assessment states the dam has, or the proposed dam after its construction will have, a category 1 or category 2 failure impact rating; and c) the chief executive has, under section 349, accepted the assessment. Also, a dam is a referable dam if— d) under section 342B, the dam becomes a referable dam; and e) the chief executive has not, under section 349, accepted a failure impact assessment of the dam
Relevant Entity For a dam, each of the following under the emergency action plan for the dam— a) the persons who may be affected, or whose property may be affected, if a dam hazard event or emergency event were to happen for the dam; b) each local group and district group for the emergency action plan; c) each local government whose local government area may be affected if a dam hazard event or emergency event were to happen for the dam; d) the chief executive; e) another entity the owner of the dam considers appropriate
Warning Group To give notice, advice or intimation to (a group or individual) of an impending emergency event
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Escalations / Activation Levels Summary
Decision-Maker Incident Coordinator Incident Manager Incident Manager Incident Coordinator Action/ Notification Activation Level Alert Lean Forward Stand Up Stand Down Tables Dam Hazard Storage above 44.7 mAHD (1 in 50 AEP) OR Storage above 41.5 mAHD (Closure of Monto likely to increase above 44.7 mAHD within 12 Road) OR hours Storage below likely to increase above 41.5 mAHD within 12 hours Storage above Spillway channel scour below main spillway 40.3mAHD AND 40.3 mAHD OR A1 (Sect 5.3) (Closure of Pikes Crossing) OR greater than that experienced in 2013* (flood of No further forecast Flood Inflows Spillway channel scour below main spillway similar N1 (Table 7.2) likely to increase above record) OR rainfall AND to that experienced in 2013* (flood of record) OR within 12 hours Damage to or unravelling of spillway chute Risk reduced to 40.3 mAHD Minor damage to spillway chute below main below main spillway mass concrete structure acceptable level spillway mass concrete structure OR OR Erosion at Auxiliary Spillway Saddle 6 Significant erosion Auxiliary Spillway Saddle 6 Loss of Unusual seepage OR A2 (Sect 5.4) containment (main Increasing seepage with cloudy water OR Piping failure or similar progressive failure Risk reduced to High readings in v-notch weir at N2 (Table 7.3) embankment, Damage to the dam observed likely or established acceptable level toe of dam / spillway gallery spillway, saddles) Loss of A3 (Sect 5.5) High levels of seepage through Increasing seepage with cloudy water OR Piping failure or similar progressive failure Risk reduced to containment N3 (Table 7.4) Taragoola Quarry Bund Damage to the bund likely OR established acceptable level (Taragoola bunds) Changing or unusual Signs of distress OR Abnormal A4 (Sect 5.6) piezometer readings. Single Increasing leakage into the gallery OR Increasing signs of distress OR Risk reduced to instrument N2 (Table 7.3) piezometer reading above alarm Multiple piezometer readings above alarm limits as Increasing leakage or cracking acceptable level readings limits as defined in SOP033. defined in SOP033. Earthquake MMI ≥ 4 OR Earthquake MMI ≥ 7 OR A5 (Sect 5.7) Risk reduced to Earthquake Richter scale >4 Earthquake MMI ≥6 (Strong earthquake) Earthquake MMI< 7 AND possible failure path N4 (Table 7.5) acceptable level (Light earthquake) identified Incident with potential for damage to dam occurs A6 (Sect 5.8) Major damage threatening structural integrity / Risk reduced to Structural Damage N/A OR N4 (Table 7.5) potential loss of containment acceptable level Minor damage to dam Confirmed terrorist activity OR Large explosion heard/observed at dam (bomb A7 (Sect 5.9) N/A Possible terrorist activity observed OR Risk reduced to Terrorism explosion, aircraft hit) OR N5 (Table 7.6) Threat received acceptable level Failure in progress or likely due to impact or explosion or threat Dam Hazard Dam Hazard Event Emergency Event
* Scour in January 2013 event was equivalent to scour > 3m deep and extended > 30m downstream of spillway apron.
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1. INTRODUCTION The Queensland Water Supply (Safety and Reliability) Act 2008 (the Act) requires that the owner of a referable dam must have an approved Emergency Action Plan (EAP) for the dam.
Gladstone Area Water Board (GAWB) has prepared this EAP for Awoonga Dam (the dam) in accordance with this requirement.
1.1 Purpose The Awoonga Dam EAP (AWD EAP) has been prepared to address the requirements of Sections 352A – 352V of the Act and the Emergency action plan for referable dam guideline (DNRME, 2017). According to the Act, the main purpose of an EAP is “to minimise the risk of harm to persons or property if a dam hazard event or emergency event for the dam happens”.
This EAP outlines the procedures GAWB follows to respond collaboratively with Local, District and State Disaster Management Groups, local government, emergency agencies and affected persons to manage the consequences of a dam hazard event or emergency event at Awoonga Dam.
The information contained in this EAP is also for the use of emergency services and other agencies involved in dealing with emergency situations at, and downstream of, Awoonga Dam.
1.2 Scope
The AWD EAP covers: • key details of the dam (Section 2) • identification of the roles and responsibilities of all parties (Section 3) • identification of dam hazards, dam hazard events and dam emergency events (Section 4) • identifies the processes to be followed in the event of a dam hazard or emergency event (Section 5) • identifies the general communication protocols to be followed (Section 6) • identifies the notifications and warnings that will be issued in the event of a dam hazard or emergency event (Section 7)
1.3 Strategic Framework
Disaster management in Queensland is governed by the Disaster Management Act 2003 which provides the framework and principles behind the Queensland Disaster Management Arrangements identified in Figure 1.1.
Figure 1.1 : Queensland Disaster Management Arrangements Source: Participant Guide: Queensland Disaster Management Arrangements Version 8.0 (QFES, 2018)
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Under the arrangements, local government is responsible for disaster management at the community level through development and implementation of a Local Disaster Management Plan. Where necessary, the Local Disaster Management Group can request assistance and support from the District Disaster Management Group, and State Disaster Coordination Centre (SDCC).
Failure of Awoonga Dam is identified as a hazard under the Gladstone Regional Council LDMP (the LDMP) and references the AWD EAP in Threat Specific Arrangement #5, Dam Failure. GAWB is identified as the lead agency relating to failure of Awoonga Dam, and the LDMP notes that management of the upstream and downstream effects of flooding relating to dam failure may require activation of Operational Plans under the LDMP. The AWD EAP has been developed to support and be consistent with the LDMP.
The Gladstone District Disaster Management Plan (the DDMP) similarly identifies GAWB as the hazard-specific primary agency for failure of Awoonga Dam, and notes the arrangements identified in the LDMP.
GAWB is an advisory member of the Gladstone LDMG (the LDMG) and attends all LDMG meetings to provide flooding and infrastructure advice related to Awoonga Dam. During EAP activation, GAWB provides regular updates to the LDMG in accordance with Section 3.1 of this EAP.
1.4 GAWB Emergency Resilience Framework GAWB is committed to responding promptly and effectively, and being well prepared to handle, all emergencies, security events and disasters that could threaten the ability of GAWB to supply water or to continue in business. The Emergency Management Resilience Framework has been developed to facilitate a coordinated approach to management of all security and emergency incidents, consistent with Local and District Disaster Management Plans. The framework comprises the suite of documents outlined in Figure 1.2.
Figure 1.2 : GAWB Emergency Management Resilience Framework
1.4.1 Emergency Management Plan
The Emergency Management Plan (EMP) is the top-level document which identifies the plans that form the framework and the linkages between these plans. The EMP details the emergency management philosophy, approaches and levels of emergency management, and documents the processes, procedures and structure for the Incident Management Team (IMT) responsible for management of an emergency on behalf of GAWB. Awoonga Dam and its associated structures are listed as a Critical Site. Each Critical Site has a site-specific management plan to assist the IMT to manage incidents. This EAP is the site-specific management plan for the dam.
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1.4.2 Emergency Communications Plan and Contact List The stand-alone Emergency Communications Plan and Contact List (ECP) is maintained on a regular basis and must be activated in the event of any major incident, emergency, disaster or terrorist related act. The ECP includes the communications procedures, protocols, standard messages, contact groups and contact details required for notifications and warnings under this EAP.
1.4.3 Cyclone Management Plan High rainfall in the catchment that results in the activation of the AWD EAP may be as a result of the advent of cyclonic weather conditions or a severe tropical low depression system. If this is the case, the Cyclone Management Plan is likely to be activated concurrent with the EAP.
It is preferable that actions commence earlier rather than waiting for weather conditions to deteriorate, with decisions to act based on anticipated wind speed and rainfall published by the BOM.
1.4.4 Security Risk Management Plan (Terrorism)
This plan defines how GAWB will prepare for, and respond to, security and terrorism threats and broader criminal acts such as trespass, vandalism and offences against the GAWB personnel, assets and property. It has been developed consistent with the National Counter Terrorism Plan and Queensland Counter Terrorism Strategy (2013-18). Action Plan 5.9, which deals with suspected or confirmed terrorist threat to the dam, has been developed in line with this plan and the Terrorism Management SOP.
1.5 Consultation Process
An effective EAP requires the collaboration and agreement of all parties with roles and responsibilities. Prior to submission of an EAP for approval, the Act requires the Draft EAP to be submitted to the relevant local government and District Disaster Management Group (DDMG).
Prior to submission of the EAP for approval, GAWB has completed this formal consultation process in accordance with the requirements of the Act. In addition, GAWB has also consulted widely with all relevant entities during preparation of the EAP, including: • Emergency Action Plans, Dam Safety Regulator (DNRME) • Local Disaster Management Group (LDMG) • District Disaster Management Group (DDMG) • Gladstone Regional Council (GRC)
Table 1.1 outlines the key consultation undertaken (formal and informal), the parties involved and the outcomes.
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Table 1.1 : Consultation in EAP Preparation
Process Date Entities Outcome
Emergency Action Plans, Water Agreement on hazard identification December EAP Enhancement Workshop Supply Regulator (DNRME) Agreement on key areas for further 2017 LDMG / GRC collaboration
Agreement on key areas and dates for DDMG Briefing 1 March 2018 DDMG involvement
Agreement on roles, responsibilities, interface DDMG Briefing 2 April 2018 DDMG with the DDMP
Agreement on roles, responsibilities, interfaces Discussion of appropriate Stand Up trigger and benefits of consistent triggers Discussion of consistency of messaging Agreement that standard communication notices have all required information LDMG Briefing 1 / GRC May 2018 LDMG / GRC Agreement that any evacuation request should be via direct communication, followed by an email Agreement that use of GIS maps, updated annually, is better for LDMG needs rather than paper/PDF maps
Agreement on revised Stand Up trigger LDMG Briefing 2 / GRC June 2018 LDMG / GRC Agreement on wording of SDCC EA wording
Formal submission of EAP for July 2018 GRC Notice received – refer to appendix I Local Government Assessment
DDMG have verbally advised that they have Formal submission of EAP for July 2018 DDMG reviewed the EAP and will not be formally DDMG Review responding.
Formal submission of EAP to August 2018 DNRME GAWB to submitted to DNRME for review DNRME
1.6 Training and Exercises
GAWB conducts a minimum of one emergency management exercise each year that includes the use of the AWD EAP. These exercises may vary from year to year from a desk top exercise, to an emergency simulation including external agencies. Where possible, joint agency exercises are preferred.
The objective of the exercises is to: • Test the adequacy and relevance of the AWD EAP, and its relationship to GAWB’s Emergency Management Framework. • Identify improvements to the AWD EAP and its relationship to the GAWB’s Emergency Management Framework. • Train responsible officers in their roles and actions according to the AWD EAP. • Provide the external agencies the opportunity to participate.
The timing of the exercise is no later than November 30 each year, to ensure that documents are suitable prior to the expected increase in rainfall each summer which may trigger the AWD EAP.
Results of the exercises are communicated to the LDMG.
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1.7 Community Education and Awareness Program
GAWB will undertake a community education and awareness program annually in the lead up to cyclone season. This program will incorporate: • Direct communications with residents of Pikes Crossing to ensure awareness of the procedure, currency of contact details and provision of alternative route access swipe cards • Direct communications with residents Upstream of North Coast Rail to ensure awareness of procedure and currency of contact details • Direct communications with residents and lessees at Lake Awoonga Recreational Area to ensure awareness of procedure and currency of contact details • Pre-cyclone season awareness and planning with GRC to ensure consistent messaging and awareness of residents Downstream of North Coast Rail • Participation in GRC pre-cyclone general awareness campaign to the general public, where possible.
1.8 Documentation and Reporting
1.8.1 Incident Logs
Activities and decisions undertaken by each Incident Management Team member during any incident must be recorded in chronological order in the incident logs. The Incident logs are to be supported by other documentation such as dam safety surveillance check sheets and photographs.
A copy of the relevant sections of the EAP, comments regarding the adequacy of the EAP and any recommendations or suggested changes to the EAP should also be included where appropriate.
An Incident Log is to be maintained on site by the Dam Site Inspector and also at GAWB Head Office by the Incident Manager / Incident Coordinator.
A pro forma of an Incident Log, Dam Safety Surveillance check sheet, Piezometer readout sheet and Seepage readout sheet is included in Appendix E, but other sources of recording may be used throughout the EAP (for example data loggers for instrumentation telemetry).
1.8.2 Post Event Reporting
For each activation of the EAP, details of the Incident and Actions are to be reported to relevant GAWB staff in accordance with the EMP.
1.8.3 Emergency Event Report
In accordance with Section 352V of the Act, an Emergency Event Report (EER) must be prepared for each Dam Emergency Event that occurs, and submitted to the DDS DNRME. In practice, any activation of the AWD EAP which reaches Stand Up will be considered an Emergency Event and require an Emergency Event Report.
A template for the Emergency Event Report has been developed and is included in Appendix H. The Emergency Event Report must include: • A description of the emergency event • Information on the implementation of the EAP including details of communications, actions and monitoring • A description of any damage to the dam, and whether the damage is related to the emergency event • An assessment of the efficacy of the EAP for the emergency event • Recommendations for updates to the EAP • Any other relevant matters or other matters prescribed under a regulation.
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1.9 Review Schedule The content of the AWD EAP is to be reviewed annually, following an Emergency Event at the dam, and prior to the end of the approval period.
If substantive changes are proposed to the EAP, such as changes to the dam structure, PAR, inundation maps, warnings or triggers for escalation events, the following schedule applies:
By 1 September Amended plan submitted to DNRME (Dam Safety Regulator)
30 business days prior Amended plan submitted to GRC and DDMG Chair for review
If no change or minor changes are proposed to the EAP, such as update of contact details, minor updates to warning messages, or minor corrections, then the following schedule applies:
By 1 October Notice of review (and amended plan if relevant) submitted to DNRME (Dam Safety Regulator)
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2. Details of the Dam
2.1 Dam Location
Awoonga Dam is located on the Boyne River at AMTD 22.9 km, approximately 30 km South of Gladstone, in Central Queensland, Australia. Lake Awoonga has a catchment area of 2,230 km2. Figure 2.1 provides a map of the dam locality and catchment.
2.2 Key Dam Details
Awoonga Dam is a Concrete Faced Rockfill Dam with an un-gated concrete gravity spillway section and three saddle dams. The dam was raised to its current height in 2001, with raising of Saddle Dam No 3 (earthfill) and the addition of an excavated auxiliary spillway at Saddle Dam No 6 in 2014. A general arrangement drawing is included in Appendix D.
Table 2.1 : Awoonga Dam Details
Category Detail
Location Boyne River AMTD 22.9 km
Property Description Lot 90 on CTN1668
Full Supply Level 40.0 mAHD
Storage Capacity at Full Supply 777,000 ML
Surface Area at Full Supply 6,780 ha
Main Embankment
Dam Type Concrete Faced Rockfill Dam
Dam Crest Level 55.4 mAHD
Length of Crest 658 m
Width of Crest 6 m
Dam Height 53 m
Spillway
Type of Spillway Un-gated concrete gravity spillway
Spillway Crest Level 40.0 mAHD
Spillway Crest Length 110.95 m
Saddle Dam No 6 (Auxiliary Spillway)
Crest Level 50.1 mAHD
AEP of overtopping 1 in 6,500
Saddle Dam No 3
Dam Crest Level 52.9 mAHD
AEP of overtopping Approximately 1 in 60,000
Saddle Dam No 4
Dam Crest Level 52.5 mAHD
AEP of overtopping Approximately 1 in 40,000 – 50,000
Taragoola Bund
Crest level 52.9 mAHD
ABP of overtipping 1 in 60 000 ABP
PAR Nil
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Figure 2.1 : Awoonga Dam Location and Catchment
Source: Boyne River Basin water plan area map (Queensland Government, 2013)
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2.3 Population at Risk
The most recent Failure Impact Assessment for Awoonga Dam (GHD, 2015) found that Sunny Day Failure was the critical failure event with an associated population at risk in excess of 2,000. Accordingly, Awoonga Dam is considered a Category 2 referable dam under the Act, with a Hazard Category of Extreme.
Based on the Extreme hazard category and the Guidelines on Acceptable Flood Capacity for Dams (DEWS, 2017), the ‘fall-back’ assessment of required spillway capacity is the Probable Maximum Flood. Awoonga Dam could currently safely pass 62 % of the Acceptable Flood Capacity (ie 62% of the PMF flow), however the spillway crest and shute may have potential issues which are currently being investigated.
2.4 Access to Awoonga Dam
Access to the dam is via Awoonga Dam Road, as outlined in Figure 2.2.
From Gladstone, follow the Bruce Highway for 20 km to Benaraby. Turn right onto Awoonga Dam Road, and continue for 8 km. This road leads to the Maintenance Workshop and Lookout on the left abutment. Access to the right abutment including the pump station and office is via a bridge over the spillway chute downstream of the dam.
In heavy rainfall, road access may be cut by floodwater. Personnel should be mobilised to site prior to conditions deteriorating, where possible. Awoonga Dam Road between the Bruce Highway and Awoonga is subject to local flooding at Machine Creek at Benaraby, as well as Little Oakey Creek and Tuckers Gully close to Awoonga.
Alternative access is via helicopter. There is no helipad located at the site. However, a safe landing area is located at Lookout 2 Carpark upstream of the left abutment, at Latitude: 24° 4’ 14” S Longitude: 151° 18’ 25” E.
2.5 Access around Awoonga Dam
Figure 2.3 illustrates access routes around Awoonga Dam. Care must be exercised when travelling as roads may be damaged, and debris or power lines may be across roads. Where possible, travel to outlying assets should be deferred following heavy rainfall until roads have been cleared and officially re-opened.
Access to the toe of the main embankment, the right abutment and the main embankment crest is via the spillway bridge, turning left immediately after the bridge. This access also provides an alternative access to Pikes Crossing and is cut at a lake level of approximately 42.5 mAHD.
Access to Boynedale Bush Camp is via Gladstone Monto Road which is cut at a lake level of approximately 41.5 mAHD.
Access to the recreation area, caravan park, and recreation area leases is via Awoonga Dam Road inside the dam area gate. Access to Saddle Dam No 3, 4 and 6 is further along Awoonga Dam Road through two locked gates.
Depending on the level of inflow and the rise in the water level of Awoonga Dam, it may also be necessary to evacuate Taragoola Quarry. Access to Taragoola Quarry is via Taragoola Road. This access may be cut due to elevated lake levels. It may take several days after the event has passed before the water has receded sufficiently to enable access to the quarry. Access to inspect the Taragoola Bunds is via the quarry, which is cut at a lake level of 42 mAHD.
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Figure 2.2 : Access to Awoonga Dam
Directions from Gladstone Area Water Board to Lake Awoonga
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Figure 2.3 : Access around Awoonga Dam
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3. Roles and Responsibilities
3.1 Entity Responsibilities
As the owner of Awoonga Dam, GAWB has responsibility for implementation of the AWD EAP.
Outside GAWB, other entities also have roles and responsibilities under this EAP. The agreed roles and responsibilities are outlined in Table 3.2.
Contact details for external entities are contained within the ECP in Appendix B.
Table 3.1 : Agreed Entity Roles and Responsibilities
Entity Role Responsibilities
GAWB Implement AWD Provide GIS shape files for all flood events and Sunny Day Failure event to LDMG for EAP planning purposes as and when these files are updated. Last updated August 2015. Provide regular notification via email to LDMG via standard form ‘Awoonga Dam Spilling Event Communication Notice’ during flood events. Provide regular notification via email to LDMG via standard form ‘Awoonga Dam Non- Flood Event Communications Notice’ during non-flood events. Advise LDMG if activation of LDMP is required during non-flood events. Maintain contact register for residents immediately downstream of Awoonga Dam to the North Coast Rail Line, and notify of dam levels and outflows likely to affect them. Provide regular updates to these persons until flooding of Pikes Crossing has receded. Notify LDMG when notifications/warnings have been issued. Maintain contact register for upstream residents affected by Lake Awoonga backwater and notify these persons during an event which results in flooding likely to affect them. Notify LDMG when notifications/warnings have been issued. Maintain contact register for upstream residents and notify these persons during an event which results in flooding of Calliope-Monto Road. Provide regular updates to these persons until flooding of Calliope-Monto Road has receded. Provide LDMG with notification contact lists. Notify LDMG when notification, warning or evacuation downstream of the North Coast Rail Line may be required due to dam outflows or likely dam failure. Activate SDCC Emergency Alert polygon when required.
LDMG Coordinate disaster Notify and communicate with other emergency agencies (i.e. QFES, QPS, SES) response Assess the severity of possible flooding and determine necessary actions based on information provided by GAWB, as well as other available information such as storm-tide inundation. Notification and communications in an emergency event covered by the Awoonga Dam EAP for residents downstream of the North Coast Rail Line. The initiation, management, and timing of any and all evacuations in an emergency event covered by the Awoonga Dam EAP for residents downstream of the North Coast Rail Line. Provide DDMG status reports on situation.
DDMG Support disaster Provide support to LDMG where capacity and capability to respond is reached. response Provide SDCC status reports on situation. Make application to SDCC for Disaster Declaration if required.
SDCC Implement polygon Store Emergency Alert polygons and messages. alerts Ensure Emergency Alerts polygons are prepared, stored and tested.
GRC Road closures Closure and re-opening of roads including Pikes Crossing, Calliope-Monto Road.
Queensland Police Manage evacuations Support LDMG with evacuations as required. Service Provide evacuation support if required directly where LDMG has not yet Stood Up. Provide point of contact (Counter Terrorism Liaison Officer) in possible terrorism situation.
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Entity Role Responsibilities
Dam Safety Liaise with Minister as required. Regulator, DNRME
3.2 Incident Management Team
The AWD EAP is implemented within GAWB by the Incident Management Team outlined in Figure 3.1.
The Incident Management Team comprises the following roles: • Incident Manager • Dam Site Inspector • Incident Coordinator • Flood Engineer 1 • Dam Safety Consultant • Flood Engineer 2
It is noted that not all roles are activated in all events/ activation levels. An Incident Manager is not activated at the Alert stage. At this level of activation, the Incident Coordinator takes overall responsibility for the event in place of the Incident Manager, including all external communications.
Figure 3.1 : GAWB Incident Management Team Roles
Incident Manager
Incident Coordinator
Dam Safety Consultant Dam Site Inspector Flood Engineer 1
Flood Engineer 2
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3.2.1 Roles and Responsibilities
The core responsibilities of each member of the Incident Management Team are outlined in Table 3.2.
Table 3.2 : Incident Management Team Roles and Responsibilities Role Main Location Core Responsibilities
Incident Manager GAWB Head Office Preparation and maintenance of EAP Review of EAP and Actions Appoint a Dam Safety Consultant Activation and escalation of EAP levels External communications (except Alert Level) Incident GAWB Head Office Formation, staffing and rostering of Incident Management Team Coordinator Coordination of activities Communicate conditions and actions to Incident Manager External Communications (Alert Level only) Post-event reporting Dam Site Inspector Awoonga Dam Coordination of activities at Awoonga Dam and recreation areas Emergency Control Monitor and inspect the dam and associated structures. Room Monitor and report on instrument readings Communicate conditions to Incident Coordinator Carry out other actions described in the EAP, or as directed by Incident Coordinator Dam Safety Likely off-site Provide advice to the Incident Management Team as requested by the Incident Consultant Coordinator Flood Engineer 1 GAWB Head Office Monitor current and predicted weather conditions including catchment rainfall Possibly off-site Input data to the Awoonga Dam Water Level Prediction Model (WLPM) Seek review of models by Flood Engineer 2 (once Stand Up is activated) Complete Spilling Event Sheet Review piezometer and instrument readings via telemetry and/or from Dam Site Inspector Communicate weather and flood model conditions to the Incident Coordinator Flood Engineer 2 Likely offsite Review flood modelling input data, model runs, outputs and communication sheets Monitor current and predicted weather conditions including catchment rainfall
3.2.2 Responsible Officers
Nominated officers and alternative delegates have been identified for each Incident Management Team role. A list of all nominated officers and alternative delegates for each role, and associated contact details, is contained within Appendix A.
All roles should be undertaken by personnel who have participated in an annual emergency simulation, outlined in Section 1.6, in that specific role within the previous three years. Persons undertaking the Flood Engineer role should be a suitably qualified engineer or scientist (e.g. hydrologist) who have been explicitly trained in the use of the Awoonga WLPM or similar model.
Redundancy of personnel is managed by each of the responsible officers training a back-up person for their particular role and actions according to the AWD EAP.
Most hazard and emergency events associated with Awoonga Dam will occur over a period of several days. When forming an incident team, consideration should be given to staffing the roles over at least three days ahead.
When a role changeover occurs at the end of each shift, a handover briefing must be carried out. The handover brief may be informal, but records of the briefing (such as dot point notes) should be included in the Event Log.
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It is the responsibility of the current team member to brief the new (incoming) team member (i.e. Current Dam Site Inspector briefs new Dam Site Inspector). If further clarification of the situation is required, the Incident Coordinator should be contacted in the first instance, and the Incident Manager thereafter.
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4. Hazards, Events and Impacts
4.1 Dam Hazards
Under Section 352A of the Act, a dam hazard is defined as:
‘a reasonably foreseeable condition that may: (a) cause or contribute to the failure of the dam, if the failure may cause harm to persons or property; or (b) require an automatic or controlled release of water from the dam, if the release of the water may cause harm to persons or property.’
GAWB has completed a risk identification process in consultation with the LDMG, DDMG, GRC and DNRME to identify all dam hazards for Awoonga Dam, with the following identified: 1) Flood inflows 2) Loss of containment through the main embankment, spillway or saddle dams 3) Loss of containment through the Taragoola bunds 4) Abnormal piezometer readings 5) Earthquake 6) Structural Damage 7) Terrorism
4.2 Dam Hazard Events and Emergency Events
Section 352A of the Act also defines two levels of events arising from a dam hazard: a dam hazard event and an emergency event. The key difference between the two levels is that an emergency event requires a coordinated response by two or more entities (i.e. action by the LDMG is required to respond to the event), whereas a dam hazard event does not.
4.3 Escalations
Consistent with the LDMP, DDMP and SDMP, Table 4.1 outlines the activation and escalation levels that have been adopted within the AWD EAP. It has been identified for the AWD EAP, that events that escalate to a Stand Up level constitute an emergency event, while events that do not reach Stand Up level are dam hazard events.
The following sections define each dam hazard in more detail. A table summarising the escalation triggers for all dam hazards can be found at the front of the document.
Table 4.1 : Activation and Escalation Levels (Reproduced from LDMP)
Level of Activation Definition
Alert A heightened level of vigilance due to the possibility of an event in the area of responsibility. No action is required however the situation should be monitored by someone capable of assessing the potential of the threat.
Lean Forward An operational state prior to 'stand up' characterised by a heightened level of situational awareness of a disaster event (either current or impending) and a state of operational readiness. Disaster coordination centres are on standby; prepared but not activated.
Stand Up The operational state following 'lean forward' whereby resources are mobilised, personnel are activated and operational activities commenced. Disaster coordination centres are activated.
Stand Down Stand Down Transition from responding to an event back to normal core business and/or recovery operations. There is no longer a requirement to respond to the event and the threat is no longer present.
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4.4 Dam Hazard and Emergency Event Impacts
4.4.1 Flood Event Impacts
Rainfall in the catchment will produce inflows to Lake Awoonga. This may elevate lake levels above the Full Supply Level of 40.0 mAHD and produce spillway overflows.
The impact of elevated lake levels includes: • Restriction of access to and around the dam • Closure of the Boynedale Bush Camp, recreation areas and recreation lease areas • Inundation and closure of Calliope-Monto Road, affecting access for Boyne Valley residents • Inundation of Taragoola Quarry including access • Restriction or reduction of water supply from the dam to distribution infrastructure.
Notable structure levels for emergency planning are identified in Table 4.2 and an overview map of the lake area affected at key levels is included in Figure G.2 - located in Appendix G.
Table 4.2 : Notable levels for emergency planning
Lake Level Relevance Comment (mAHD)
30.00 Environmental release lower limit No environmental releases below this level
40.00 Spillway Crest level. Discharges over spillway commence Environmental release upper limit. Environmental releases no longer required
40.30 Pikes Crossing Inundated Notifications to Pikes Crossing Residents required
41.00 Boynedale Bush Camp Inundated Evacuation of camp required well before this
41.50 Boyne Valley (Calliope – Monto) Road inundated Short section of Boyne Valley Road at Ifley Creek
42.50 Right abutment access road inundated at River Discharge Pit Restricted access around dam site
44.40 Top of concrete slab of Intake tower Flooding over access to Intake tower
44.70 1 in 50 AEP flood level GHD (2015) FIA. First evacuations occur at this level (See Table 7.1)
45.20 Top of Block Wall at Intake tower. Dry well of Intake tower will flood above this level
45.40 1 in 100 AEP flood level GHD (2015) FIA
47.00 Taragoola Quarry Liner Top of clay liner on Taragoola Quarry embankments
47.80 1 in 1,000 AEP flood level GHD (2015) FIA
48.30 Flood of record Peak 2013 flood level
50.10 Crest of Saddle No.6 Auxiliary Spillway. Flow commences over Saddle 6
50.40 1 in 10,000 AEP flood level GHD (2015) FIA
52.00 Taragoola Quarry Embankment Flow commences over top of constructed bunds at Taragoola Quarry protection works
52.50 Crest of Saddle No. 4 Flow commences over Saddle 4
52.90 Crest of Saddle Dam No.3 Flow commences over Saddle Dam 3
53.08 Top of Left Abutment Flow commences over top of besser block nib wall at left abutment
53.20 1 in 100,000 AEP flood level GHD (2015) FIA
55.40 Top of Main Embankment
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The impact of spillway overflows increases with increasing lake levels and includes: • Closure of Pikes Crossing Road • Inundation of low-lying buildings along the Boyne River downstream of the dam • Although unlikely, increased potential for dam failure.
Table 4.3 identifies the impacts on downstream populations of a range of flood events including spillway overflows and dam failure flows. Table 4.4 identifies key downstream levels relevant to emergency planning.
Table 4.3 : Downstream flooding impacts
Peak Lake Number of Event-Affected Buildings Event Level (mAHD) Residential Commercial School Total
1 in 100 AEP 45.40 30 4 0 34
1 in 1,000 AEP 47.80 161 9 0 170
1 in 10,000 AEP 50.40 241 13 0 254
1 in 100,000 AEP 53.20 544 16 1 561
PMF 55.60 1174 57 9 1240
PMF with Saddle Dam 3 Failure 55.40 1278 68 12 1358
Table 4.4 : Key downstream levels
AMTD Estimated Critical Boyne Travel Location Level Comments River Time* (mAHD) (km) (hrs)
Pikes Crossing 19.8 3.25 0.6 Deck level. Pikes Crossing Road over Boyne R.
Queensland Rail Bridge 14.7 19.00 3.0 Formation level. Main North Coast Rail Line Bridge over Boyne R.
Bruce Highway Bridge 12.0 13.28 3.2 Deck level. Bruce Highway Bridge over Boyne R.
Boyne Island Road Bridge NA 4.80 4.6 Deck level. Boyne Island Road Bridge over South Trees Inlet.
John Oxley Bridge 1.5 11.47 4.9 Deck level. Bridge connects Boyne Island and Tannum Sands. * Modelled travel time for flood peak from Awoonga Dam in PMF with Saddle Dam 3 failure (GHD, 2017). Conditions may vary in an actual event.
An overview map of the downstream areas affected in the 1 in 100 AEP event and PMF event with Saddle Dam 3 Failure can be found in Figure G.1 located in Appendix G.
Detailed flood mapping for a full range of flood levels, from the 1 in 100 AEP event to the PMF with Saddle Dam 3 Failure, is available on GIS at GAWB. The GIS data is available to be viewed by all staff on GAWB intranet via “Managed Bookmarks” on the Favourites Bookmark Bar.
A copy of this detailed mapping for the full range of events is also available on the GRC GIS system.
A paper copy of detailed flood mapping is kept at the following locations • GAWB Emergency Management Centre, Level One, 136 Goondoon Street • GAWB Main Building Gladstone Water Treatment Plant • GAWB Chief Engineers’ Office, Level 3, 136 Goondoon Street.
A PDF electronic copy of individual detailed flood maps is distributed on USB or CD with main text per distribution list.
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4.4.2 Non-Flood Event Impacts
Sunny Day Failure of the dam can occur through a range of mechanisms.
Table 4.5 provides a summary of the five dam hazards which may occur without flooding, and the impacts of each. These hazards could occur during flood conditions. In this instance, the impacts identified in Section 4.4.1 for dam failure would apply.
Sunny Day Failure through the main embankment or spillway will cause significant downstream flooding including inundation of up to approximately 1,000 downstream properties. An overview map of the areas potentially affected by Sunny Day Failure can be found in Figure G.3 in Appendix G.
Failure of the Taragoola Quarry bunds would cause inundation of the quarry area but will not affect other properties. A map of the affected quarry area can be found in Figure G.4 in Appendix G.
Table 4.5 : Sunny Dam Failure Impacts
Dam Hazard Description Impact
Loss of containment Seepage through the main embankment, failure of conduit or saddle Significant inundation of (main embankment, dams could indicate an increased likelihood of failure through piping. downstream properties. spillway, saddle dams) Similarly, increased leakage through the spillway gallery could indicate an increased likelihood of failure via sliding or overturning of the mass concrete spillway structure.
Loss of containment Top of clay liner of Taragoola Quarry Bunds is 47.0 mAHD. Water levels Quarry area only. (Taragoola bunds) greater than 47.0 mAHD will greatly increase leakage through the bunds and result in inundation of Quarry pits.
Unusual instrument Piezometer readings outside the normal range could indicate an Significant inundation of readings increased likelihood of failure through sliding or overturning of the mass downstream properties. concrete spillway structure.
Earthquake The occurrence of an earthquake in the area could cause damage to Significant inundation of the dam spillway or Taragoola bunds leading to an increased likelihood downstream properties and/or of failure. Taragoola Quarry.
Structural damage A high energy impact to the dam could occur via a plane crash or heavy Significant inundation of machinery accident on site. This could cause damage to the dam or downstream properties and/or Taragoola bunds leading to an increased likelihood of failure. Taragoola Quarry.
Terrorism A terrorist threat, or activity could increase the likelihood of failure of the Significant inundation of dam. This could affect any part of the dam or Taragoola bunds. downstream properties and/or Taragoola Quarry.
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5. Action Plans This section details the Action Plans to be followed for an event arising from each of the dam hazards defined in Section 4.1. Each action plan is comprised of: • A brief overview of the dam hazard and impacts • A decision chart and/or table identifying the thresholds, logic and decision maker for escalations • A table identifying the individual actions for each of the Incident Management Team A table summarising the escalation triggers for all dam hazards can be found at the front of the document.
Run sheets for each action plan are developed and reviewed annually, as part of the Pre-Wet Season Checklists included in GAWB’s Cyclone Management Plan.
5.1 Safety Conditions causing the activation of the AWD EAP, such as weather conditions, may also cause hazardous conditions at or near the site. Staff that work during an emergency event should note the following in respect to hazards and safety: • Safety and prevention of injury is more important than the operation of infrastructure • It will be difficult to gain external medical assistance in the event of an injury. It may not be possible to travel to medical facilities. All staff working during an emergency event should be first-aid trained where possible • Normal communications systems are likely to be disrupted • Weather which could activate the AWD EAP is likely to also bring high winds and heavy rain. Beware of flying debris and flooding • Travel to or from the dam may be hazardous due to flooding, fallen power lines and other debris. Do not travel until conditions have eased and authorities have issued advice that weather conditions have moderated. Check road conditions prior to travelling • Only carry out work that is considered essential and only if safe to do so • Carefully assess each situation before taking any action. Only undertake activities if it is safe to do so.
5.2 Equipment A series of items will be required by the IMT in order to manage the implementation of the EAP. These items should be located at both the GAWB office 136 Goondoon St in Gladstone and the Gladstone Water Treatment Plant. A standing 6-monthly Work Order exists for a check of the availability and function of this equipment.
A list of required items, including personal items for each member of the IMT and shared equipment, is available in Appendix F.
5.3 Action Plan 1: Flood Inflows
Rainfall in the catchment will produce inflows to Lake Awoonga. This may elevate lake levels above the Full Supply Level of 40.0 mAHD and produce spillway overflows. Elevated lake levels and spillway flows may inundate or isolate properties both upstream and downstream of the dam.
Upstream areas affected in a range of flood events are presented in Figure G.2 located in Appendix G while
Figure G.1 located in Appendix G presents an overview of the potential downstream areas affected by flooding for arrange of events.
The AWD EAP is activated for lake levels, or predicted lake levels, above 40.3 mAHD. This represents 300 mm flow over the spillway and causes the closure of Pikes Crossing Road downstream of the dam. At this level, the event becomes a dam hazard event. An event becomes a dam emergency event when lake levels reach 44.7 mAHD.
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Procedures for flood inflows and spillway flows for lake levels below 40.3 mAHD are outlined in SOP 034: Minor Flooding Actions. It is expected that the spilling event preparatory actions outlined in SOP 034 will be complete prior to activation of the EAP. If this is not the case, these preparatory actions must be completed on escalation to Alert status. Preparatory actions included in SOP 034 include: • Commencement of predictions using the Water Level Prediction Model (WLPM) • Establishment of the Emergency Control Centre including testing of communications • Preparation of resources and equipment for activation of the EAP
As part of SOP 034 and the ECP, initial notifications are sent to the Pikes Crossing notification group as their access (via Pikes Crossing) is cut at 40.3 mAHD, and GAWB provides alternative access through a secured gate until lake levels reach 42.5 mAHD. An initial notification is sent to all notification groups to advise that an event is imminent with a brief description of the situation.
Flood inflows may occur due to a cyclone event. If this is the case, all members of the Incident Management Team should also review and action the Cyclone Management Plan as applicable.
Figure 5.1 identifies the dam level thresholds for escalation of activation levels for flood inflows, and levels of relevant dam features.
Figure 5.1 : Escalation triggers for Action Plan 1: Food Inflows
Figure 5.2 provides an overview of the decision processes for escalation / de-escalation during a flood event.
Factors which could materially increase the likelihood of activation of this Action Plan include: • Intense rainfall predicted or occurring: e.g. Severe Weather alert issued by the BoM, intense rainfall event recorded in catchment rain gauges, and or approach of large and intense rainfall system observed on BoM weather radar • Elevated Lake levels: e.g. Spillway flows (refer SOP 022 Spillway Discharge Alerts), and or prior or concurrent minor flooding (refer SOP 034 Minor Flooding) • Catchment and stream conditions: Prior rainfall and consequent wet catchment conditions with significant stream flows observed at Milton (Boyne River) or Marlua (Diglum Creek).
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Table 5.1 Provides a summary of key consequences and critical levels for each activation level.
Table 5.1 : Action Plan 1: Flood Inflows: Summary Table
Activation Situation Key Consequences Key Notifications Event (AEP) Peak Lake Level Level (mAHD)
Alert Lake level Closure of Pikes Crossing Road at Pikes Crossing Residents greater than, or 40.3 mAHD alternative access likely to increase Potential flooding of Boynedale Bush Evacuation of Boynedale above Camp upstream of Dam at 41.0 mAHD Bush Camp 40.3mAHD Spilling Event Sheet to LDMG
Lean Lake level Closure of Calliope-Monto Road at lake Pikes Crossing Residents Forward greater than, or level greater than 41.5 mAHD closure of alternative access likely to increase Closure of vehicular access to right Boyne Valley Residents above abutment at 42.5 mAHD including Spilling Event Sheet to 41.5mAHD alternative access for Pike Crossing LDMG residents Electrical isolation to old intake tower at Awoonga Dam prior to closure of access to right abutment
Stand Up Lake level Downstream evacuations from Evacuation of affected 1 in 50 44.7 greater than, or 44.7 mAHD residents upstream of North 1 in 100 45.4 likely to increase Leakage possible into Taragoola Quarry Coast Rail (varying triggers 1 in 200 46.2 above at 47.0 mAHD (top of clay liner) from 44.7 mAHD) 44.7mAHD Activation of auxiliary spillway at Saddle Taragoola Quarry at 1 in 500 47.0 47.0mAHD 6 from 50.1 mAHD 1 in 1,000 47.8 Flow into Taragoola Quarry at about Affected residents upstream 1 in 2,000 48.5 52.00 mAHD (top of bund walls) of Awoonga Dam (varying Flow over Saddle Dam No.3 from levels from 48.0 mAHD) 1 in 5,000 49.6 52.9mAHD. Failure expected Spilling Event Sheet to 1 in 10,000 50.4 approximately 4 hours after overtopping. LDMG Flow over spillway left abutment at Potential notification of 1 in 100,000 53.2 affected residents 53.08 mAHD – possible failure of left PMF 55.6 abutment downstream of North Coast Rail by LDMG Widespread flooding Potential for dam failure
Stand Lake level less Pike Crossing Residents on Down than 40.3mAHD re-opening of road Boyne Valley Residents on reopening of road All stakeholders on closure of event
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Figure 5.2: Action Plan 1: Flood Inflows: Decision Process
Notifications according to Notification Table #1
START
Rainfall event occuring monitoring according to SOP022 and SOP035 YES
Storage above Storage above Storage above 44.7mAHD OR likely 41.5mAHD OR 40.3mAHD OR to increase above likely to increase 44.7mAHD within 12 likely to increase YES above 41.5mAHD hours NO above 40.3mAHD within 12 hours within 12 hours
Evacuations commence from YES 44.7mAHD
YES YES Notify STAND UP (IM) DNRME/LDMG Notify /staff (IC) DNRME/LDMG/staff ALERT (IC) Notify LEAN FORWARD Evacuate Taragoola Quarry if (IC) DNRME/LDMG/staff (IM) inspection not possible or bund (IC) failure anticipated (IM)
Seek advice from Spillway channel scour BOM (FE) Monitor situation (IC/DSI) Spillway channel scour Seek advice Monitor situation (IC/DSI) below main spillway OR Update WLPM (FE) below main spillway OR Update WLPM (FE) from BOM (FE) greater than 2013 OR similar to 2013 OR Minor Monitor situation (IC/DSI) Evacuate if dam breach anticipated damage to or unravelling damage to spillway chute SDCC/LDMG/Pikes Crossing/DS to Update WLPM (FE) of spillway chute below YES below main spillway North Coast Rail (IM) YES main spillway concrete concrete structure OR LDMG structure OR signgicant Erosion at auxillary Pikes Crossing Pikes Crossing erosion at auxillary spillway 6 Boyne Valley Boyne Valley spillway 6 (DSC/IC) Notifications (IC) Notifications Closure of Recreation Area (IM) Emergency (000) if breach immiant and no prior warnings
Dam levels decreasing AND storage below NO 40.3mAHD AND no further NO forecast rainfall Dam levels Dam levels YES decreasing AND NO decreasing YES storage below AND storage 44.7mAHD below
YES
NO
STAND DOWN (IC)
Close out and report (IM)
END
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5.3.1 Inspections and data review
Analysis of available data and inspections of the dam are an essential part of this Action Plan. In addition to visual inspections of the dam, a series of data is available via the telemetry system. The telemetry system is available to GAWB personnel via the intranet. The following instrument readings are available: • Piezometers: - All gallery piezometers are connected to the telemetry system. - Data is collected weekly but can be accessed at 4 hour intervals and instantaneously. - Piezometer alarm limits are noted in SoP033. • V Notch Weirs: - The V-notch weir adjacent to the river discharge pit is to be checked and if necessary read manually on a daily basis, but would typically be flooded due to high tailwater levels in a flood event. - The 3 gallery V notch weirs have continuous reading outputs accessible via telemetry. • Gauging Stations: - Dam headwater - Milton - Marlua - Nargoorin
5.3.2 Water Level Prediction Model (WLPM)
A critical tool for management of flood inflows is the Water Level Prediction Model (WLPM) used by the Flood Engineer to predict lake levels and time to go to reach key levels. The model is a macro enabled spreadsheet running on Microsoft Excel.
The model should be reviewed every three years in sequence with but six to twelve months ahead of the Awoonga Dam EAP review schedule.
The running of the water level prediction model should be undertaken by suitably trained and or experienced engineers (e.g. nominated Flood Engineer) or hydrologist. If the Flood Engineer is not available or cannot run the WLPM there are two options • Flood Engineer (or incident coordinator) to contact GHD to arrange running of the model. GHD was responsible for the development of the model, has a copy of the model in their systems. • Alternatively, contact BoM directly, or indirectly via LDMG, and request information on results of BoM flood modelling, noting that this information may not be available prior to activation of district or state disaster management groups.
The following details the location of the WLPM: • A (secure) original copy of the model is held in the library. • Working copies of the model are located as follows: - GAWB network (public) drive - P:\Awoonga Dam EL 40 m Data\Awoonga WLPM - On the modelling laptop held in Engineering Services
A copy of the Water Level Prediction Model (WLPM) manual is in ECM reference: 90692.
A guide to sourcing rainfall predictions data for use in the model is provided as notes on data entry worksheets within the WLPM.
Otherwise, rainfall data and stream levels can be obtained from: • BoM websites
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- Actual rainfall and river conditions http://www.bom.gov.au/qld/flood/ - Forecast rainfall: http://www.bom.gov.au/jsp/watl/rainfall/pme.jsp?ref=ftr or http://www.bom.gov.au/australia/meteye/ (rainfall tab) • Applications (must be set up by GAWB ICT) for rainfall and stream level data - Eagle io website, via web browser, providing access to data held on server run by Environmine (GAWB environmental monitoring contractor) - Enviromon application, providing access to BoM Alert system (rain gauges) - GAWB SCADA system, access via remote desktop viewer (RD Viewer), Awoonga Overview for GAWB’s stream and rain gauges.
5.3.3 Individual Action Plans
Table 5.2 to Table 5.5 provide individual Action Plans for the Incident Manager, Incident Coordinator, Dam Site Inspector and Flood Engineer 1. Flood Engineer 2 is responsible for review and checking of Flood Engineer 1’s lake level predictions, once Lean Forward is reached.
Table 5.2 : Action Plan 1: Flood Inflows: Incident Manager
Activation Levels / Actions Triggers
Alert Incident Manager not activated at Alert Level. • Storage above 40.3 mAHD (Closure of Pikes Crossing) OR • likely to increase above 40.3 mAHD within 12 hours
• Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix E.
Lean Forward • Mobilise staff to roles as per the roster prepared by Incident Coordinator. • Storage above 41.5 • If personnel at the recreational area require assistance, provide support as required. mAHD (Closure of • Undertake program of regular updates (12 hourly) and notifications as per Notification Table 1 (Table Monto Road) OR 7.2). • likely to increase above • Issue notifications and warnings according to Notification Table 1 (Table 7.2) and / or as a 41.5 mAHD within 12 consequence of information received from Incident Coordinator. hours OR • Maintain a register of all external communications. • Spillway channel scour • Prepare media statement for CEO in conjunction with relevant communications protocols if required. below main spillway similar to that • Notify CEO of intake tower closure and possible water restrictions. experienced in 2013* • Review and, with Operations Support, address water supply issues including: (flood of record – noted 1. Review need to keep Tooloola and Fitzsimmons Street Reservoirs topped up (pump operation in Escalations/Activation outside normal hours) and frequency of pump operation. Levels Summary on 2. Monitor demand on both raw and treated water system. page 6) OR 3. Maintain treated water storages at or near full supply level. • Minor damage to • spillway chute below If dam level exceeds or is likely to exceed 44.7 mAHD in the next 12 hours, escalate to Stand Up. main spillway mass • If spillway channel scour below main spillway OR minor damage to spillway chute greater than 2013 concrete structure OR OR significant erosion at Auxiliary Spillway Saddle 6, escalate to Stand Up. • Erosion at Auxiliary • If lake level is decreasing and falls below 41.5mAHD with no further forecast rainfall, de-escalate to Spillway Saddle 6 Alert. • Inform Incident Management Team of any changes to Activation Level.
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Activation Levels / Actions Triggers
Stand Up • As per previous activation level AND • Storage above 44.7 • Increase frequency of program of regular updates and notifications to a 4 hour minimum as per mAHD (1 in 50 AEP) OR Notification Table 1 (Table 7.2). likely to increase above • Persons upstream and downstream of Awoonga Dam and downstream of Taragoola Quarry are at 44.7 mAHD within 12 risk in high dam levels. Evacuations commence at varying triggers once lake level reaches hours 44.7mAHD. Issue notifications and warnings according to Notification Table 1 (Table 7.2). Assist • Spillway channel scour LDMG where required. below main spillway • Overtopping of Saddle Dam 3 will occur if water levels exceed 52.9 mAHD. Estimated time to failure greater than that of Saddle Dam 3 after overtopping commences is 4 hours. experienced in 2013* (flood of record – noted • If lake level is decreasing and falls below 44.7 mAHD, de-escalate to Lean Forward. in Escalations/Activation • If requested by the Incident Coordinator, request Ergon Energy (Rockhampton) to isolate power to Levels Summary on Awoonga Dam. page 6) OR • Damage to or unravelling of spillway chute below main spillway mass concrete structure OR • Significant erosion Auxiliary Spillway Saddle 6
Stand Down • Assess information obtained from the Incident Coordinator. • Storage below • If the event escalated to Stand Up, review EER and submit to DNRME for review within 30 business 40.3mAHD AND days. • No further forecast • Prepare media statement for CEO in conjunction with relevant communications protocols if required. rainfall
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Table 5.3 : Action Plan 1: Flood Inflows: Incident Coordinator
Activation Levels / Actions Triggers
• Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix E.
• Check all SOP 034: Minor Flood Event actions are completed. • Complete any outstanding SOP 034: Minor Flood Event actions. • Check all required personnel, equipment and provisions are mobilised to Awoonga Dam and communications established. • Revise roster and roles for staff required to implement EAP to provide continuous coverage of the situation and assist mobilisation of staff. Provide roster to Incident Manager.
• Assess information obtained (WLPM) from the Dam Site Inspector and Flood Engineer 1. • If personnel at the recreational area require assistance, provide support as required.
• Review WLPM estimates against escalation triggers and key levels for road access to Awoonga and Pikes Crossing on a regular basis (at least every 12 hours): Alert 1. Pikes Crossing Road at Pikes Crossing at 40.3mAHD • Storage above 2. Calliope-Monto Road at 41.5 mAHD 40.3 mAHD (Closure of 3. Taragoola –Quarry Access Road at 42.5 mAHD Pikes Crossing) OR 4. Local access roads around Awoonga Dam at 42.5 mAHD • likely to increase above 40.3 mAHD within 12 • Issue regular updates (daily) and notifications and warnings according to Notification Table 1 (Table hours 7.2). • Issue updates to Staff as per Notification Table 1 (Table 7.2). • Assist in preparation of a media statement for CEO in conjunction with relevant communications protocols if required.
• If dam level exceeds or is likely to exceed 41.5mAHD in the next 12 hours, escalate to Lean Forward and activate the Incident Manager. • If spillway channel scour below main spillway OR minor damage to spillway chute similar to 2013 OR erosion at Auxiliary Spillway Saddle 6, escalate to Lean Forward and activate the Incident Manager. • Inform the Incident Management Team of any changes in Activation Level. • If lake level is decreasing and falls below 40.3 mAHD with no further forecast rainfall, de-escalate.
• If lake level is decreasing, organise for reinstatement of facilities when safe.
Lean Forward • Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix E. • Storage above 41.5 • Activate Flood Engineer 2 to review and check Flood Engineer’s lake level predictions. mAHD (Closure of Monto Road) OR • Assess information obtained from the Dam Site Inspector and Flood Engineer. • likely to increase above Prior to 42.5mAHD: 41.5 mAHD within 12 • Confirm with the Dam Site Inspector that the main pump station has been shut down and that hours OR power to the pump station and to SunWater pump station has been isolated. • Spillway channel scour • If communications are lost between the dam and the Incident Coordinator, lake levels can be below main spillway obtained from http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDQ60289.html#Boyne similar to that • Every 6 hours or more frequently if conditions are changing rapidly, review flood levels and WLPM experienced in 2013* estimates of time to go to higher levels against escalation triggers and notification triggers in (flood of record – noted Notification Table 1 (Table 7.2) and Table 1 in ECP. in Escalations/Activation Levels Summary on 1. Taragoola –Quarry Access Road at 42.0 mAHD page 6) OR 2. Local access roads around Awoonga Dam at 42.5 mAHD • Minor damage to 3. Right abutment access road at 42.50 mAHD spillway chute below 4. Access to Old Intake Tower restricted at 44.40 mAHD main spillway mass 5. Downstream properties to North Coast Rail (Table 1 in ECP) concrete structure OR 6. Upstream properties in the Boyne Valley (Table 1 in ECP) • Erosion at Auxiliary • Review and provide Spilling Event Communications Sheet to Incident Manager. Spillway Saddle 6
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Activation Levels / Actions Triggers
• Inform Incident Manager if dam level exceeds or is likely to exceed 44.5mAHD within 12 hours and recommend escalation to Stand Up. • Inform Incident Manager of potential inundation of roads/properties and recommend notifications and warnings according to Notification Table 1 (Table 7.2). • Issue updates to Staff as per Notification Table 1 (Table 7.2). Lean Forward (continued) • Inform Incident Manager of status / observations recorded by Dam Site Inspector and Flood Engineer 1. • Update Incident Manager of status of tasks associated with closure and securing Awoonga Dam and surrounds.
• If lake level is decreasing, organise for reinstatement of facilities when safe.
• Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix E.
• Assess information obtained (WLPM) from the Dam Site Inspector and Flood Engineer 1.
• If communications are lost between the dam and the Incident Coordinator, lake levels can be obtained from http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDQ60289.html#Boyne • Every 4 hours or more frequently if conditions are changing rapidly, review flood levels and WLPM estimates of time to go to higher levels against escalation triggers and notification triggers in Notification Table 1 (Table 7.2) and Table 1 in ECP, Appendix B. Stand Up 1. Downstream properties to North Coast Rail (Table 1 in ECP) • Storage above 44.7 2. Upstream properties in the Boyne Valley (Table 1 in ECP) mAHD (1 in 50 AEP) OR 3. Saddle Dam No 6 Auxiliary spillway at 50.1 mAHD likely to increase above 4. Taragoola bunds at 52.0 mAHD 44.7 mAHD within 12 hours 5. Saddle Dam no 4 at 52.5 mAHD • Spillway channel scour 6. Saddle Dam No 3 at 52.9 mAHD below main spillway 7. Flow over left abutment at 53.08 mAHD greater than that 8. Flow over main dam at 55.4 mAHD experienced in 2013* NOTE: Estimated time to failure of Saddle Dam No 3 once overtopping commences is 4 (flood of record – noted hours. in Escalations/Activation • Levels Summary on Review and provide Spilling Event Communications Sheet to Incident Manager page 6) OR • Inform Incident Manager of time to go until overtopping of: • Damage to or 1. Saddle 6 Auxiliary Spillway unravelling of spillway 2. Top of left abutment chute below main 3. Taragoola Bunds spillway mass concrete 4. Saddle Dam 4 structure OR 5. Saddle Dam 3 • Significant erosion • Inform Incident Manager of flow over left abutment and increased discharge after 53.08 mAHD. Auxiliary Spillway • Inform Incident Manager of potential inundation of roads/properties and recommend notifications Saddle 6 and warnings according to Notification Table 1 (Table 7.2). • Issue updates to Staff as per Notification Table 1 (Table 7.2). • Inform Incident Manager of status / observations recorded by Dam Site Inspector and Flood Engineer. • Review whether isolation of power to Awoonga Dam is required and if so, notify the Incident Manager to request Ergon Energy (Rockhampton) to isolate power to Awoonga Dam.
• If lake level is decreasing, organise for reinstatement of facilities when safe.
• Organise for reinstatement of facilities when safe. Stand Down • Assess information obtained from the Dam Site Inspector and Flood Engineer. Storage below 40.3mAHD • Issue updates to Staff as per Notification Table 1 (Table 7.2). AND • Review records and reports. Compile an Incident Report, or EER (if event escalated to Stand Up) No further forecast rainfall and submit to Incident Manager.
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Table 5.4 : Action Plan 1: Flood Inflows: Dam Site Inspector Actions
Activation Levels / Actions Triggers
• Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix E.
• Check all SOP 034: Minor Flood Event actions are completed. Advise Incident Coordinator of status. • Complete any outstanding SOP 034: Minor Flood Event actions and advise Incident Coordinator of status.
• On a regular basis (at least every 12 hours, or as required): 1. Inspect embankment and major works, including spillway Alert 2. Monitor and record rainfall and dam level • Storage above 40.3 mAHD (Closure of 3. Check and record all seepage and piezometer readings Pikes Crossing) OR 4. Monitor water level in Pit 3 via remote monitoring • likely to increase above 5. Ensure that all pumps and systems are operational at the pump station within 12 40.3 mAHD • Inform Incident Coordinator of results and observations and any damage to the dam or associated hours structures.
• Before lake reaches 41.0 mAHD, ensure Boynedale Bush Camp is evacuated, closed, and secured in accordance with Notification Table 1 (Table 7.2).
If dam level is decreasing: • Reinstate equipment to normal operating conditions when safe to do so (includes opening valves, reinstating power, access, etc.). • Inform Incident Coordinator of any reinstatements.
Lean Forward • As per previous activation level AND • Storage above 41.5 • Increase frequency of instrument readings (every 6 hours or as directed by Incident Coordinator). mAHD (Closure of • Increase frequency of detailed inspection of the spillway (as a minimum every 6 hours). Monto Road) OR • Increase frequency of reports back to Incident Coordinator (as a minimum every 6 hours). • likely to increase above NOTE: Right abutment access cut at 42.5mAHD. 41.5 mAHD within 12 hours OR Prior to inundation of right abutment access at lake level of 42.5mAHD: • Spillway channel scour • Inspect the intake tower. below main spillway • Select valves at highest level. similar to that • Ensure sump pumps are turned off. experienced in 2013* • Turn off all lights and lift. (flood of record – noted • Install seals and gates in the openings of the tower floodwalls. in Escalations/Activation Levels Summary on • Ensure tower is locked and secure. page 6) OR • Organise HV Licenced Contractor to isolate HV Sub-station. This is the HB transformer on the dam • Minor damage to wall that supplies power to the old inlet tower. It isolates the inlet tower. spillway chute below • Assist HV Licensed Contractor, as required. main spillway mass • Once the HV Licensed Contractor has isolated the HV Sub-station, assist the HV Licensed concrete structure OR Contractor to restore the LV power supply to the pump station and SCADA. • Erosion at Auxiliary • Update Incident Coordinator of completion of above tasks and current status or observations. Spillway Saddle 6 At lake level of 42.0 mAHD:
• Organise electrician to isolate power to the toilet block at the recreational area, café and ironbark gully. • If not already organised by Incident Coordinator, organise Grounds and Catchment Officer to: 1. Close Recreation Areas (Caravan Park, Scouts, Ski Club, Bowhunters). Assist with evacuations if access permits. 2. Close dam. Close and secure gates heading to Riverstone Bay and heading to boat ramp. Post signage advising of temporary closure. 3. Close and secure gate on road leading to Saddle Dam (check that everyone is out of this area). 4. Close and secure gate after Lookout turn-off. 5. Secure (lock) access to the embankment, tower and spillway gallery.
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Activation Levels / Actions Triggers 6. Close site to all external visitors and contractors (Dam Operator and GAWB staff only allowed at the dam). 7. Prepare a list of all persons staying at the recreation area for the duration of the event (including Rangers and their families, the Caravan Park); including emergency contact details Lean Forward (continued) (relatives etc.). A pro-forma is located in Appendix E of this plan and the Cyclone Management Plan. Forward a copy of the list to the Incident Coordinator. 8. Assist in obtaining any provisions required by persons at the recreational areas. • Request assistance from Incident Coordinator as required. • Report to Incident Coordinator on completion of above tasks and current status or observations.
• As per previous activation level AND
• Increase frequency of program of regular instrument readings (every 4 hours or as directed by Incident Coordinator). • Increase frequency of detailed inspection of the spillway (as a minimum every 4 hours). • Add the following to the regular inspections: 1. Inspect embankment and downstream toe, spillway and discharge channel conditions, left dam Stand Up abutment condition if spilling Note: No road access to the right abutment. • Storage above 44.7 2. Monitor condition of Saddle Dam No.3 (only if safe to do so). mAHD (1 in 50 AEP) OR 3. Review safety of accessing dam through the Spillway Access Bridge. If not safe, do not access likely to increase above and close and secure gates. 44.7 mAHD within 12 4. Review safety of accessing dam through the spillway gallery. If not safe, do not access. hours • Increase frequency of reports back to Incident Coordinator (as a minimum every 4 hours). • Spillway channel scour • If conditions deteriorate, that is, communications are poor and monitoring of instrumentation etc. is below main spillway not possible, provide updates as the lake level increases every 1.0 m and give simple ‘dam still greater than that there’ instructions to the Incident Coordinator. Any information is better than none. experienced in 2013* NOTE: No access to right abutment or intake tower. (flood of record – noted in Escalations/Activation • Every 12 hours, check register of persons seeking refuge at recreation area and advise Incident Levels Summary on Coordinator. page 6) OR Once lake level has reached 44.7 mAHD: • Damage to or • Shutdown Awoonga Dam Pump Station (including SunWater Pump Station) and turn off main unravelling of spillway switch so the pumps cannot start. chute below main • Isolate power to the Awoonga Dam Pump Station (including SunWater pump station) when tailwater spillway mass concrete levels reach within about 2 m of flooding the switch room or pump stations. structure OR • Inform Incident Coordinator when shutdown and power isolation is complete. • Significant erosion • Auxiliary Spillway Review overtopping of structures: Saddle 6 1. Saddle Dam No 6 Auxiliary spillway at 50.1 mAHD 2. Taragoola bunds at 52.0 mAHD 3. Saddle Dam No 4 at 52.5 mAHD 4. Saddle Dam No 3 at 52.9 mAHD 5. Flow over left abutment at 53.08 mAHD 6. Dam crest at 55.4 mAHD
• If dam failure is observed, evacuations are to commence. See Notification Table 1 (Table 7.2).
Stand Down • Immediately following the event, submit records and reports to the Incident Coordinator for review. Storage below 40.3mAHD • Decrease frequency of instrument readings (every 12 hours or as directed by Incident Coordinator). AND • Decrease frequency of detailed inspection of the spillway (as a minimum every 12 hours). No further forecast rainfall • Reinstate equipment to normal operating conditions when safe to do so (includes opening valves, AND reinstating power, access, etc.). Stand Down (continued) • Ensure that all pumps and systems are operational at the pump station. Risk reduced to acceptable • Reinstate all dam operating functions and recreation amenities level
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Table 5.5 : Action Plan 1: Flood Inflows: Flood Engineer 1 and 2
Activation Levels / Triggers Actions
• Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix E.
• Check all SOP 034: Minor Flood Event actions are completed. Advise Incident Coordinator of status. • Complete any outstanding SOP 034: Minor Flood Event actions and advise Incident Coordinator of status.
Alert • Establish contact with the Bureau of Meteorology (Duty Flood Engineer) and discuss • Storage above 40.3 mAHD (Closure developing situation. of Pikes Crossing) OR • Flood Engineer 1 - Update the WLPM and estimate time to go to EAP trigger levels • likely to increase above 40.3 mAHD and notable structure levels as appropriate (every 12 hours or more frequently if within 12 hours conditions are changing rapidly). • Fill in the Spilling Event Communications Sheet and provide to Incident Coordinator. • Update Incident Coordinator of completion of above tasks and current status of observations. • Estimate time to go to levels: 1. 41.50 mAHD (Lean Forward, Calliope-Monto Road cut) 2. 44.70 mAHD (Stand Up, First downstream evacuations, 1 in 50 AEP)
Lean Forward • As per previous activation level AND • Storage above 44.7 mAHD (1 in 50 • Increase frequency of program of activities (every 6 hours or as directed by Incident AEP) OR likely to increase above Coordinator). 44.7 mAHD within 12 hours • Review piezometer and seepage data and report anomalies to Incident Coordinator. • Spillway channel scour below main • Estimate time to go to levels: spillway greater than that experienced 1. 42.50 mAHD (right abutment access road cut) in 2013* (flood of record – noted in Escalations/Activation Levels 2. 44.40 mAHD (access to Old Intake Tower restricted) Summary on page 6) OR 3. 44.70 mAHD (Stand Up, First downstream evacuations, 1 in 50 AEP) • Damage to or unravelling of spillway 4. 47.00 mAHD (top of clay liner in Taragoola Bunds) chute below main spillway mass 5. 47.80 mAHD (1 in 1,000 AEP) concrete structure OR 6. 48.70 mAHD (1 in 2,000 AEP) • Significant erosion Auxiliary Spillway 7. 50.10 mAHD (crest of Saddle No.6 auxiliary spillway) Saddle 6 • Flood Engineer 2 to check the data and results.
Stand Up • As per previous activation level AND • Storage above 44.7 mAHD (1 in 50 • Increase frequency of program of activities (every 4 hours or as directed by Incident AEP) OR likely to increase above Coordinator). 44.7 mAHD within 12 hours • Estimate time to go to levels: • Spillway channel scour below main 1. 47.80 mAHD (1 in 1,000 AEP) spillway greater than that experienced 2. 48.70 mAHD (1 in 2,000 AEP) in 2013* (flood of record – noted in 3. 50.10 mAHD (crest of Saddle No.6 auxiliary spillway) Escalations/Activation Levels Summary on page 6) OR 4. 50.40 mAHD (1 in 10,000 AEP) 5. (top of bunds at Taragoola Quarry) • Damage to or unravelling of spillway 52.00 m AHD chute below main spillway mass 6. 52.50 mAHD (crest of Saddle No 4) concrete structure OR 7. 52.90 mAHD (crest of Saddle Dam No.3) • Significant erosion Auxiliary Spillway 8. 53.08 mAHD (top of left abutment) Saddle 6 9. 55.40 mAHD (overtopping of dam crest)
Stand Down • Immediately following the event, submit records and reports to the Incident Storage below 40.3 mAHD AND Coordinator for review. No further forecast rainfall AND Risk reduced to acceptable level
Review Date – September 2020 36 Awoonga Dam Emergency Action Plan
5.4 Action Plan 2: Loss of Containment (Main Embankment, Saddle Dams)
Seepage through the main embankment or saddle dams could indicate an increased likelihood of failure through piping. Similarly, increased leakage through the spillway gallery could indicate an increased likelihood of failure via sliding or overturning of the mass concrete spillway structure. Failure of these structures could cause rapid flooding of downstream properties (Figure G.3 located in Appendix G).
Error! Reference source not found. provides an overview of the decision processes and thresholds for escalation and de-escalation during a potential loss of containment, or piping, event.
Factors which could materially increase the likelihood of activation of this Action Plan include: • Activation of other action plans within the EAP • Identified issues known from Dam Safety Inspections (refer SOP 025 Annual Dam Safety Inspections), or other scheduled inspections by GAWB staff (refer SOP 002 Routine Dam Inspections).
5.4.1 Inspections and data review
Inspection of the V Notch Weirs and analysis of available telemetry data is an essential part of this Action Plan.
The V-notch weir adjacent to the river discharge pit is to be checked and if necessary, read manually on a daily basis, but would typically be flooded due to high tailwater levels in a flood event.
The 3 gallery V notch weirs have continuous reading outputs accessible via telemetry.
5.4.2 Individual Action Plans
Table 5.6 to Table 5.9 provide individual Action Plans for the Incident Manager, Incident Coordinator, Dam Site Inspector and Dam Safety Consultant.
Review Date – September 2020 37 Awoonga Dam Emergency Action Plan
Figure 5.3: Action Plan 2: Loss of Containment: Decision Process
Notifications according to Notification Table #2 START
Routine Inspections according to SOP022
YES
Unusual seepage or NO high readings in v- Piping failure or notch weir Increasing seepage similar progressive NO with cloudy water NO failure OR damage to dam likely/established
YES YES YES
ALERT (IC) STAND UP (IM)
LEAN FORWARD (IM)
Notify DNRME/LDMG/staff Notify DNRME/LDMG/staff
Notify DNRME/LDMG/staff
Monitor situation Evacuate if dam breach anticipated (IC/DSI/DSC) Monitor situation SDCC/LDMG/Pikes Crossing/DS to (IC/DSI/DSC) North Coast Rail (IM) Monitor situation (IC/DSI/DSC)
NO Emergency (000) if breach immiant Dam stablised and no prior warnings and risk NO reduced Dam stablised and risk reduced Dam stablised and risk NO reduced
Confirm risk reducted to acceptable level (DSC)
YES Confirm risk reducted (DSC)
YES Confirm risk reducted (DSC)
STAND DOWN (IC)
Close out and report (IM)
END
38 Review Date - September 2020 Awoonga Dam Emergency Action Plan
Table 5.6 : Action Plan 2: Loss of Containment: Incident Manager
Activation Levels Actions
Alert Incident Manager not activated at Alert Level. Unusual seepage OR High readings in v-notch weir at toe of dam / spillway gallery
Lean Forward • Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. A Increasing seepage with report log pro-forma is located in Appendix E. cloudy water OR • Receive advice from Incident Coordinator. Damage to the dam • In consultation with the Incident Coordinator and Dam Safety Consultant, make a decision to observed undertake repairs or not.
• Undertake program of regular updates and notifications as per Notification Table 2 (Table 7.3). • Maintain a register of all external communications. • Prepare media statement for CEO in conjunction with relevant communications protocols if required.
• If piping or similar progressive failure likely or established, escalate to Stand Up. • If dam appears to have stabilised, monitor the situation and confirm with the Dam Safety Consultant prior to de-escalation. • Advise Incident Management Team of any changes to Activation Level.
• As per previous activation level, AND Stand Up • Receive advice from Incident Coordinator on status of damage to the dam. Piping failure or similar • Support repair process as required. progressive failure likely or established • Issue notifications and warnings according to Notification Table 1 (Table 7.2). Evacuations to commence if dam failure anticipated within 4 hours.
Stand Down • Assess information obtained from the Incident Coordinator. Risk reduced to acceptable • If the event escalated to Stand Up, review EER and submit to DNRME for review within 30 business level days. • Advise all involved of event closure according to Notification Table 1 (Table 7.2). • Prepare media statement for CEO in conjunction with relevant communications protocols if required.
Review Date – September 2020 39 Awoonga Dam Emergency Action Plan
Table 5.7 : Action Plan 2: Loss of Containment: Incident Coordinator
Activation Levels Actions
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. A report log pro-forma is located in Appendix E.
• Mobilise Dam Site Inspector to site in order to undertake inspections. • Assess data from Dam Site Inspector. • Determine if the seepage rate is developing an increasing trend.
• If required, commission a Dam Safety Consultant to provide specialist advice on the situation and request a ‘Specialist Inspection’. Assist Dam Safety Consultant as required. • Relay details of the situation to Dam Safety Consultant. Information that should be relayed includes the amount of leakage, the type of leakage, location of problem, (e.g., chainage or Easting / Northing) lake level, forecast and specific details of any other observations, (i.e., Alert describe the situation). Unusual seepage OR • Assist Dam Safety Consultant with regard to inspection, monitoring and reporting as required. High readings in v-notch weir • Review need for and frequencies of further inspections or monitoring. at toe of dam / spillway gallery • Undertake program of regular updates and notifications as per Notification Table 1 (Table 7.2). • Maintain a register of all external communications. • Assist in preparation of a media statement for CEO in conjunction with relevant communications protocols if required. • Issue updates to Staff as per Notification Table 1 (Table 7.2).
• If increasing cloudy seepage or damage to the dam is observed, move to Lean Forward and activate Incident Manager. • If dam appears to have stabilised, monitor the situation and confirm with the Dam Safety Consultant prior to de-escalation to Stand Down. • Advise Incident Management Team of any changes to Activation Level. • As per previous activation level, AND • Monitor the situation and continually relay the situation back to the Incident Manager. Note any changes. • Implement specialised advice and further monitoring of the dam as advised by the Dam Safety Consultant. Lean Forward • Keep Incident Manager informed of situation and developments. Increasing seepage with • Consult with Dam Safety Consultant and Incident Manager on required repairs and decision to cloudy water OR undertake immediate repairs or not. Damage to the dam observed • If repairs are to be undertaken the Dam Safety Consultant and Incident Coordinator are to specify the repairs. • Coordinate the repair process and manage site activities accordingly. • If repairs are not to be undertaken, the damage is to remain monitored. • If piping or similar progressive failure likely or established, advise Incident Manager to escalate to Stand Up. Stand Up • As per previous activation level. Piping failure or similar • Mobilise Dam Safety Consultant to site to inspect the damage. progressive failure likely or • Relay information and details of damage to Incident Manager as required. established • If damage is considered serious enough, advise Incident Manager to commence evacuations.
Stand Down • Monitor the situation and confirm with the Dam Safety Consultant and Dam Safety Inspector prior Risk reduced to acceptable to recommending event closure to Incident Manager. level • Review records and reports. Compile an Incident Report, or EER (if event escalated to Stand Up) and submit to Incident Manager. • Issue updates to Staff as per Notification Table 1 (Table 7.2).
Review Date – September 2020 40 Awoonga Dam Emergency Action Plan
Table 5.8 : Action Plan 2: Loss of Containment: Dam Site Inspector
Activation Levels Actions
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E.
• Establish a detailed monitoring program. Note: On site monitoring under this plan is only to take place whilst safe conditions exist. • Observe and record leakage hourly until directed otherwise. Identify any areas where leakage is higher than normal, or turbid. • Advise Incident Coordinator of data and any trends of leakage rate (particularly if the leakage rate is increasing or a change in the rate of leakage). • Perform inspections on a regular basis (at least twice daily or as directed). Advise Incident Coordinator of results of inspections and observations. • Assist Incident Coordinator or Dam Safety Consultant as required. • Regularly update the Incident Coordinator with progress. • Alert For leakage through main embankment: Unusual seepage OR 1. Inspect the upstream concrete facing, looking for signs of movement, displacement, or High readings in v-notch weir cracking of the concrete slabs (may require inspection from a boat on the lake, but only if safe at toe of dam / spillway gallery to do so). 2. Inspect the downstream face, looking for slumping or displacement of the rock fill. 3. Inspect the downstream toe for evidence of seepage.
• For leakage through saddle dam SD3 and SD4: 1. Inspect the upstream embankment (may require inspection from a boat on the lake, but only if safe to do so) 2. Inspect the downstream face • Inspect the downstream toe for evidence of seepage.
• For leakage through the spillway or gallery: 1. Inspect the spillway structure both internally (in the gallery) and externally, looking for signs of movement, displacement or cracking 2. Inspect the downstream face of the spillway for evidence of seepage 3. Monitor piezometers in the spillway
• As per previous activation level. Lean Forward • Increase frequency of dam inspections (at least every 4 hours or as directed). Arrange lighting if Increasing seepage with and as required. cloudy water OR Damage to the dam observed • If damage to the dam is observed, notify the Incident Coordinator immediately providing details of observations.
• As per previous activation level AND
• Review inspection and monitoring regime and intensify frequency as advised by Incident Stand Up Coordinator / Dam Safety Consultant. Piping failure or similar • Support and organise repairs on site in accordance with instruction from the Incident Coordinator progressive failure likely or and / or Dam Safety Consultant. established • On completion of the repairs, monitor and report to the Incident Coordinator.
• If dam failure is observed, evacuations are to commence. See Notification Table 1 (Table 7.2).
Stand Down • Immediately following the event, submit records and reports to the Incident Coordinator for Risk reduced to acceptable review. level
Review Date – September 2020 41 Awoonga Dam Emergency Action Plan
Table 5.9 : Action Plan 2: Loss of Containment: Dam Safety Consultant
Activation Levels Actions
Alert • Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix Unusual seepage OR E.
High readings in v-notch weir • Assess the leakage data and inspect the dam if required. at toe of dam / spillway gallery • Advise Incident Coordinator of situation, observation and results. • If damage to the dam is indicated, or if there is a high risk of dam failure, advise Incident Coordinator. • Assist Incident Coordinator as required.
Lean Forward • As per previous activation level. Increasing seepage with • Inspect any damage. cloudy water OR • Assess survey of surveillance marks and provide report. Damage to the dam observed • Scope all urgent repair work and consult with Incident Coordinator regarding instigation and organisation of repairs.
Stand Up • As per previous activation level. Piping failure or similar • Inspect the damage and any repairs undertaken to date. progressive failure likely or • Identify any follow up repairs or works required. established
Stand Down • Provide report to Incident Coordinator as required, including any repair work identified as required Risk reduced to acceptable or completed. level
Review Date – September 2020 42 Awoonga Dam Emergency Action Plan
5.5 Action Plan 3: Loss of Containment (Taragoola)
Seepage through the Taragoola Quarry bunds could indicate an increased likelihood of failure through piping. Leakage is possible above the bund clay liner at 47.0 mAHD. Overtopping of the bund commences at 52.0 mAHD. Due to the critical levels of the bunds, it is unlikely that this Action Plan would be activated outside of a flood event.
Failure of the Taragoola Quarry bunds would cause inundation of the quarry area but will not affect other properties. A map of the affected quarry area can be found in Figure G.4 located in Appendix G.
Provides an overview of the decision processes and thresholds for escalation and de-escalation during an event related to loss of containment through the Taragoola bunds. The key factor which could materially increase the likelihood of activation of this Action Plan is reports of increasing leakage or related concerns raised by the Quarry operator.
5.5.1 Inspections and data review
Regular visual inspection of the Taragoola Quarry bunds is undertaken by the Taragoola Quarry operator, Sibelco while annual dam safety inspections of the bunds is undertaken by GAWB.
In addition to visual inspections, level and rate of change alarms for water levels in Taragoola Quarry Pit 3 are available through the GAWB SCADA system.
The level and level rate of change alarms are monitored by GAWB network operators (located at GWTP) via the screen shown in Figure 5.2. On trigger of alarms the GWTP have a standing direction to contact Sibelco (using details from ECP) to advise of the alarm.
It is noted that the alarms are only relevant for dry weather. Rainfall over the pit and associated local catchment may be sufficient to cause rates of change higher than alarms.
Figure 5.2 : Taragoola Quarry Alarms Screen at Gladstone Water Treatment Plant
Review Date – September 2020 43 Awoonga Dam Emergency Action Plan
Figure 5.5: Action Plan 3: Loss of Containment (Taragoola Bunds): Decision Process
Notifications according to Notification Table #3 START
Routine Inspections according to SOP024 OR Report from Taragoola Quarry
High levels of Piping failure or seepage through Increasing seepage NO Taragoola Quarry similar progressive with cloudy water NO bunds NO failure OR damage to bund likely/established
Notify NotifyTaragoola YES Quarry/ Taragoola YES DNRME/LDMG/ YES Quarry/ Notify DNRME/LDMG Taragoola /staff ALERT (IC) Quarry/ LEAN FORWARD DNRME/LDMG (IM) STAND UP (IM) /staff
Monitor situation Monitor situation (IC/DSI/DSC) (IC/DSI/DSC) Monitor situation (IC/DSI/DSC)
NO Evacuate Taragoola Quarry if inspection not possible or bund Bund stablised failure anticipated (IM) Bund stablised and risk NO NO and risk Bund stablised reduced reduced and risk reduced
YES YES Emergency (000) if breach immiant YES and no prior warnings
Confirm risk reducted to acceptable level YES Confirm risk YES (DSC) reducted (DSC) Confirm risk reducted (DSC)
STAND DOWN (IC)
Close out and report (IM)
END
Review Date - September 2020 44 Awoonga Dam Emergency Action Plan
5.5.2 Individual Action Plans
Table 5.10 to Table 5.13 provide individual Action Plans for the Incident Manager, Incident Coordinator, Dam Site Inspector and Dam Safety Consultant.
Table 5.10 : Action Plan 3: Loss of Containment (Taragoola Bunds): Incident Manager
Activation Levels Actions
Alert Incident Manager not activated at Alert Level. High levels of seepage through Taragoola Quarry Bund
Lean Forward • Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Increasing seepage with Include photographs where possible. A report log pro-forma is located in Appendix E. cloudy water OR • Receive advice from Incident Coordinator. Damage to the bund • In consultation with the Incident Coordinator and Dam Safety Consultant, make a decision to undertake repairs or not.
• Undertake program of regular updates and notifications as per Notification Table 3 (Error! Reference source not found.. • Maintain a register of all external communications. • Prepare media statement for CEO in conjunction with relevant communications protocols if required.
• If piping or similar progressive failure likely or established, escalate to Stand Up. • If bund appears to have stabilised, monitor the situation and confirm with the Dam Safety Consultant prior to de-escalation. • Advise Incident Management Team of any changes to Activation Level.
Stand Up • As per previous activation level, AND
Piping failure or similar • Receive advice from Incident Coordinator on status of damage to the bund. progressive failure likely or • Support repair process as required. established • Issue notifications and warnings according to Notification Table 3 (Table 7.4). Evacuations to commence if it is not possible to inspect the bunds or damage is considered serious enough.
• If bund appears to have stabilised, monitor the situation and confirm with the Dam Safety Consultant prior to de-escalation.
Stand Down • Assess information obtained from the Incident Coordinator. Risk reduced to acceptable • If the event escalated to Stand Up, review EER and submit to DNRME for review within 30 business level days. • Advise all involved of event closure according to Notification Table 3 (Table 7.4). • Prepare media statement for CEO in conjunction with relevant communications protocols if required.
Review Date – September 2020 45 Awoonga Dam Emergency Action Plan
Table 5.11 : Action Plan 3: Loss of Containment (Taragoola Bunds): Incident Coordinator
Activation Levels Actions
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E.
• Organise Dam Site Inspector to inspect bund. • Assess data from Dam Site Inspector.
• If required, commission a Dam Safety Consultant to provide specialist advice on the situation and request a ‘Specialist Inspection’. Assist Dam Safety Consultant as required. • Relay details of the situation to Dam Safety Consultant. Information that should be relayed includes the amount of leakage, the type of leakage, location of problem, (e.g., chainage or Easting / Northing) lake level, forecast and specific details of any other observations, (i.e., describe the situation). Alert • Assist Dam Safety Consultant with regard to inspection, monitoring and reporting as required. High levels of seepage • Review need for and frequencies of further inspections or monitoring. through Taragoola Quarry Bund • Undertake program of regular updates and notifications as per Notification Table 3 (Table 7.4). • Maintain a register of all external communications. • Assist in preparation of a media statement for CEO in conjunction with relevant communications protocols if required. • Issue updates to Staff as per Notification Table 3 (Table 7.4).
• If increasing cloudy seepage or damage to the bund is observed, move to Lean Forward and activate Incident Manager. • If bund appears to have stabilised, monitor the situation and confirm with the Dam Safety Consultant prior to de-escalation to Stand Down. • Advise Incident Management Team of any changes to Activation Level.
• As per previous activation level, AND
• Monitor the situation and continually relay the situation back to the Incident Manager. Note any changes. • Implement specialised advice and further monitoring of the bund as advised by the Dam Safety Lean Forward Consultant. Increasing seepage with • Keep Incident Manager informed of situation and developments. cloudy water OR • Consult with Dam Safety Consultant and Incident Manager on required repairs and decision to Damage to the bund undertake immediate repairs or not. • If repairs are to be undertaken the Dam Safety Consultant and Incident Coordinator are to specify the repairs. • Coordinate the repair process and manage site activities accordingly. • If repairs are not to be undertaken, the damage is to remain monitored.
• If piping or similar progressive failure likely or established, advise Incident Manager to escalate to Stand Up.
Stand Up • As per previous activation level.
Piping failure or similar • Mobilise Dam Safety Consultant to site to inspect damage. progressive failure likely or • Relay information and details of damage to Incident Manager as required. established • If damage is considered serious enough, advise Incident Manager to commence evacuations.
Stand Down • Monitor the situation and confirm with the Dam Safety Consultant and Dam Safety Inspector prior to Risk reduced to acceptable recommending event closure to Incident Manager. level • Review records and reports. Compile an Incident Report, or EER (if event escalated to Stand Up) and submit to Incident Manager. • Issue updates to Staff as per Notification Table 3 (Table 7.4).
Review Date – September 2020 46 Awoonga Dam Emergency Action Plan
Table 5.12 : Action Plan 3: Loss of Containment (Taragoola Bunds): Dam Site Inspector
Activation Levels Actions
Alert • Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. High levels of seepage Include photographs where possible. A report log pro-forma is located in Appendix E. through Taragoola Quarry • Monitor lake levels and water level in Pit 3 via remote monitoring (every 4hours) looking for an Bund unusual rise of water level in Pit 3. • If access permits, inspect the Taragoola Quarry bund embankment and abutments for springs, deformation, erosion, movement or displacement (at least daily or as directed). Check for signs of slumps, boils and erosion, on both the upstream and downstream face of the spoil heap.
• Immediately report observations to Incident Coordinator. • Assist Incident Coordinator or Dam Safety Consultant as required.
• As per previous activation level.
Lean Forward • Increase frequency of bund inspections to twice daily as a minimum. Arrange lighting if and as Increasing seepage with required. cloudy water OR • Increase monitoring of lake levels and Pit 3 levels to hourly until directed otherwise. Damage to the bund • If damage to the bund is observed, notify the Incident Coordinator immediately providing details of observations.
• As per previous activation level AND
• Increase frequency of inspections to 4 hourly until directed otherwise.
• Review inspection and monitoring regime and intensify frequency as advised by Incident Stand Up Coordinator / Dam Safety Consultant. Piping failure or similar • Support and organise repairs on site in accordance with instruction from the Incident Coordinator progressive failure likely or and / or Dam Safety Consultant. established • Regularly update the Incident Coordinator with progress. • On completion of the repairs, monitor and report to the Incident Coordinator.
• If it is not possible to inspect the bunds or failure is observed, evacuations are to commence. See Notification Table 3 (Table 7.4).
Stand Down • Immediately following the event, submit records and reports to the Incident Coordinator for review. Risk reduced to acceptable level
Review Date – September 2020 47 Awoonga Dam Emergency Action Plan
Table 5.13 : Action Plan 3: Loss of Containment (Taragoola Bunds): Dam Safety Consultant
Activation Levels Actions
• Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix E. Alert • Assess the leakage data and inspect the bund if required. High levels of seepage • Advise Incident Coordinator of situation, observation and results. through Taragoola Quarry • If damage to the bund is indicated, or if there is a high risk of bund failure, advise Incident Bund Coordinator. • Assist Incident Coordinator as required. • Lean Forward As per previous activation level. Increasing seepage with • Inspect any damage. cloudy water OR • Scope all urgent repair work and consult with Incident Coordinator regarding instigation and Damage to the bund organisation of repairs.
Stand Up • As per previous activation level.
Piping failure or similar • Inspect the damage and any repairs undertaken to date. progressive failure likely or • Identify any follow up repairs or works required. established
Stand Down • Provide report to Incident Coordinator as required, including any repair work identified as required Risk reduced to acceptable or completed. level
Review Date – September 2020 48 Awoonga Dam Emergency Action Plan
5.6 Action Plan 4: Unusual Instrument Readings
Awoonga Dam has a series of piezometers located within the mass concrete spillway structure. Piezometer readings outside the normal range could indicate an increased likelihood of failure through sliding or overturning of the spillway structure. Similarly, increased leakage through the spillway gallery could also indicate an increased likelihood of this failure mode. Failure of the spillway structure could cause rapid flooding of downstream properties (Figure G.3 located in Appendix G).
Figure 5.6: Action Plan 4: Unusual Instrument Readings provides an overview of the decision processes and thresholds for escalation and de-escalation during an event with unusual instrument readings.
Factors which could materially increase the likelihood of activation of this Action Plan include: • Adverse trend identified hydrostatic pressure readings • History of instrument failure or error (uncorrected).
5.6.1 Inspections and data review
Analysis of available piezometer data and inspections of the dam are an essential part of this Action Plan. The telemetry system is available to GAWB personnel via the intranet. The following instrument readings are available for the piezometers: • All gallery piezometers are connected to the telemetry system. • Data is collected weekly but can be accessed at 4 hour intervals and instantaneously. • Piezometer alarm limits are noted in SoP033.
5.6.2 Individual Action Plans
Table 5.14 to Table 5.17 provide individual Action Plans for the Incident Manager, Incident Coordinator, Dam Site Inspector and Dam Safety Consultant
Review Date – September 2020 49 Awoonga Dam Emergency Action Plan
Figure 5.6: Action Plan 4: Unusual Instrument Readings: Decision Process
Notifications according to Notification Table #2
START
Routine instrumentation surveillance according to YES YES SOP003 OR Routine Inspections
YES
Increasing signs of distress OR Signs of distress OR NO increasing leakage leakage into gallery /cracking OR multiple Changing or unusual piezometer reading piezometer readings NO Single piezometer reading above alarm
YES YES
YES LEAN STAND UP (IM) FORWARD (IM)
ALERT (IC)
Notify DNRME/LDMG/staff Notify Notify DNRME/LDMG/staff DNRME/LDMG/staff
Monitor situation (IC/DSI/DSC) Evacuate if dam breach anticipated Monitor situation Monitor situation SDCC/LDMG/Pikes Crossing/DS to (IC/DSI/DSC) NO (IC/DSI/DSC) North Coast Rail (IM) NO NO
Dam stablised Emergency (000) if breach immiant Dam stablised Dam stablised and risk and no prior warnings and risk and risk reduced reduced reduced
YES YES
YES Confirm risk reducted (DSC) YES Confirm risk reducted (DSC) Confirm risk reducted to acceptable level (DSC)
STAND DOWN (IC)
Close out and report (IM)
END
Review Date - September 2020 50 Awoonga Dam Emergency Action Plan
Table 5.14 : Action Plan 4: Unusual Instrument Readings: Incident Manager
Activation Levels Actions
Alert Incident Manager not activated at Alert Level. Changing or unusual piezometer readings. Single piezometer reading above alarm limits as defined in SOP033.
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E.
• Receive advice from Incident Coordinator. • In consultation with the Incident Coordinator and Dam Safety Consultant, make a decision to Lean Forward undertake repairs or not. Signs of distress OR Increasing leakage into the • Undertake program of regular updates and notifications as per Notification Table 1 (Table 7.2). gallery OR • Maintain a register of all external communications. Multiple piezometer readings • Prepare media statement for CEO in conjunction with relevant communications protocols if above alarm limits as required. defined in SOP033. • If increasing signs of distress or leakage, escalate to Stand Up. • If dam appears to have stabilised, monitor the situation and confirm with the Dam Safety Consultant prior to de-escalation. • Advise Incident Management Team of any changes to Activation Level.
• As per previous activation level, AND
Stand Up • Receive advice from Incident Coordinator on status of damage to the dam. Increasing signs of distress • Support repair process as required. OR • Issue notifications and warnings according to Notification Table 1 (Table 7.2). Evacuations to Increasing leakage or commence if dam failure anticipated within 4 hours. cracking • If dam appears to have stabilised, monitor the situation and confirm with the Dam Safety Consultant prior to de-escalation.
• Assess information obtained from the Incident Coordinator. • If the event escalated to Stand Up, review EER and submit to DNRME for review within 30 business Stand Down days. Risk reduced to acceptable • Advise all involved of event closure according to Notification Table 1 (Table 7.2). level • Prepare media statement for CEO in conjunction with relevant communications protocols if required.
Review Date – September 2020 51 Awoonga Dam Emergency Action Plan
Table 5.15 : Action Plan 4: Unusual Instrument Readings: Incident Coordinator
Activation Levels Actions
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E.
• Review and assess instrumentation readings and inspection results. • If required, commission specialist technician to service and calibrate instrumentation.
• Mobilise Dam Site Inspector to site in order to undertake inspections.
• If required, commission a Dam Safety Consultant to provide specialist advice on the situation and Alert request a ‘Specialist Inspection’. Changing or unusual • Review need for and frequencies of further inspections or monitoring. piezometer readings. Single • Undertake program of regular updates and notifications as per Notification Table 1 (Table 7.2). piezometer reading above • Maintain a register of all external communications. alarm limits as defined in • Assist in preparation of a media statement for CEO in conjunction with relevant communications SOP033. protocols if required. • Issue updates to Staff as per Notification Table 1 (Table 7.2).
• If dam appears to have stabilised, monitor the situation and confirm with the Dam Safety Consultant prior to de-escalation to Stand Down. • If signs of distress, multiple piezometer readings outside alarm levels or increasing leakage into the gallery observed, escalate to Lean Forward and activate Incident Manager. • Advise Incident Management Team of any changes to Activation Level.
• As per previous activation level, AND
• Monitor the situation and continually relay the situation back to the Incident Manager. Note any changes. • Implement specialised advice and further monitoring of the dam as advised by the Dam Safety Lean Forward Consultant. Signs of distress OR • Organise for surveying of surveillance marks at the earliest opportunity and analysis of the results Increasing leakage into the by Dam Safety Consultant. gallery OR • Consult with Dam Safety Consultant and Incident Manager on required repairs and decision to Multiple piezometer readings undertake immediate repairs or not. above alarm limits as defined • If repairs are to be undertaken the Dam Safety Consultant and Incident Coordinator are to specify in SOP033. the repairs.
• Coordinate the repair process and manage site activities accordingly.
• If repairs are not to be undertaken, the damage is to remain monitored.
• Keep Incident Manager informed of situation and developments.
• If increasing signs of distress or leakage are observed, advise Incident Manager to escalate to Stand Up.
• As per previous activation level, AND Stand Up Increasing signs of distress • Mobilise Dam Safety Consultant and Dam Site Inspector to site to inspect the damage. OR • Relay information and details of damage to Incident Manager as required. Increasing leakage or cracking • If damage is considered serious enough, advise Incident Manager to commence evacuations.
Stand Down • Monitor the situation and confirm with the Dam Safety Consultant and Dam Safety Inspector prior to Risk reduced to acceptable recommending event closure to Incident Manager. level • Review records and reports. Compile an Incident Report, or EER (if event escalated to Stand Up) and submit to Incident Manager. • Issue updates to Staff as per Notification Table 1 (Table 7.2).
Review Date – September 2020 52 Awoonga Dam Emergency Action Plan
Table 5.16 : Action Plan 4: Unusual Instrument Readings: Dam Site Inspector
Activation Levels Actions
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E.
• Check the piezometer reading for inconsistent readings or malfunction. Alert • This may require the assistance of a specialist technician. If so, inform Incident Coordinator. Changing or unusual • After confirming correct operation of instruments, confirm all readings. Immediately report piezometer readings. Single observations to Incident Coordinator. piezometer reading above • alarm limits as defined in Implement a program of regular instrument readings (every 12 hours or as directed by Incident Coordinator) and report to Incident Coordinator. SOP033. • Carry out a detailed inspection of the spillway, particularly for increasing rates of leakage or movement (as a minimum daily). Immediately report observations to Incident Coordinator.
• Assist Incident Coordinator or Dam Safety Consultant as required.
Lean Forward • As per previous activation level. Signs of distress OR • Increase frequency of program of regular instrument readings (every 4 hours or as directed by Increasing leakage into the Incident Coordinator). gallery OR • Increase frequency of detailed inspection of the spillway (as a minimum twice daily). Multiple piezometer readings above alarm limits as defined in SOP033.
• As per previous activation level.
Stand Up • Review inspection and monitoring regime and intensify frequency as advised by Incident Coordinator / Dam Safety Consultant. Increasing signs of distress OR • Support and organise repairs on site in accordance with instruction from the Incident Coordinator Increasing leakage or and / or Dam Safety Consultant. cracking • On completion of the repairs, monitor and report to the Incident Coordinator.
• If dam failure is observed, evacuations are to commence. See Notification Table 1 (Table 7.2).
Stand Down • Immediately following the event, submit records and reports to the Incident Coordinator for review. Risk reduced to acceptable level
Review Date – September 2020 53 Awoonga Dam Emergency Action Plan
Table 5.17 : Action Plan 4: Unusual Instrument Readings: Dam Safety Consultant
Activation Levels Actions
Alert • Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix Changing or unusual E. piezometer readings. Single • Assess the anomalous instrument readings and inspect the dam if required. piezometer reading above • Advise Incident Coordinator of situation, observation and results. alarm limits as defined in • Assist Incident Coordinator as required. SOP033.
Lean Forward • As per previous activation level AND Signs of distress OR • Inspect any damage. Increasing leakage into the • Assess survey of surveillance marks and provide report. gallery OR Multiple piezometer readings • Scope all urgent repair work and consult with Incident Coordinator regarding instigation and above alarm limits as defined organisation of repairs. in SOP033.
Stand Up • As per previous activation level AND
Increasing signs of distress • Inspect the damage and any repairs undertaken to date. OR • Identify any follow up repairs or works required. Increasing leakage or cracking
Stand Down • Provide report to Incident Coordinator as required, including any repair work identified as required Risk reduced to acceptable or completed. level
Review Date – September 2020 54 Awoonga Dam Emergency Action Plan
5.7 Action Plan 5: Earthquake
The occurrence of an earthquake in the area could cause damage to the dam leading to an increased likelihood of failure. Earthquake damage could affect the main embankment, saddle dams, spillway or Taragoola bund structures, leading to rapid inundation of downstream properties (Figure G.3) or the Taragoola Quarry (Figure G.4) both located in Appendix G.Error! Reference source not found. provides an overview of the decision processes and thresholds for escalation and de-escalation during an event arising from an earthquake. The main factors which could materially increase the likelihood of activation of this Action Plan are an earthquake or earthquakes recently recorded, of magnitude less than that required for EAP activation.
5.7.1 Inspections and data review
The approach of the Earthquake Action Plan is to respond to an Earthquake by undertaking inspections to assess damage, and if signs of distress or damage are identified activate the relevant Action Plan/s for further action specific to the damage (i.e. monitoring and/or repairs).
GAWB’s seismograph is monitored by a contractor and an alert will be received in the event of an earthquake according to the procedures outlined in SOP030 Earthquake Alert Service. Alternatively, DNRME may advise GAWB that an earthquake has been detected.
5.7.2 Individual Action Plans
Table 5.18 to Table 5.21 provide individual Action Plans for the Incident Manager, Incident Coordinator, Dam Site Inspector and Dam Safety Consultant.
Review Date – September 2020 55 Awoonga Dam Emergency Action Plan
Figure 5.7: Action Plan 5: Earthquake: Decision Process
START Notifications according to Notification Table #4
Earthquake alert received as per SOP030 Earthquake Alarm Service OR from DNRME
YES YES YES
Earthquake NO MMI >6 Earthquake MMI >4 Earthquake NO OR Richter scale >4 NO MMI >7 (lighter earthquake) YES
YES YES Possible failure path identified
Possible failure path identified STAND UP (IM)
LEAN FORWARD (IM) YES Notify DNRME/LDMG/staff ALERT (IC) /Taragoola Quarry Notify DNRME/LDMG/staff Notify /Taragoola Quarry DNRME/LDMG /staff Monitor situation (IC/DSI/DSC)
Monitor situation Monitor situation (IC/DSI/DSC) Evacuations commence from (IC/DSI/DSC) 44.7mAHD
Evacuate Taragoola Quarry if Dam inspection not possible or bund Confirm risk reducted to Dam Dam YES stablised and Confirm risk failure anticipated (IM) acceptable level (DSC) YES stablised and Confirm risk reducted (DSC) YES stablised and risk reduced reducted (DSC) risk reduced risk reduced
Evacuate if dam breach anticipated SDCC/LDMG/Pikes Crossing/DS to North Coast Rail (IM) STAND DOWN (IC) NO NO NO
Emergency (000) if breach Activiate EAP Action Plan #2 Damage or signs of distress to main immiant and no prior warnings embankment or saddle dams Close out and report (IM) including cloudy seepage
Activate EAP Action Plan #3 Damage or signs of distress to END Taragools bunds including increasing cloudy seepage
Damage or signs of distress to Activiate EAP Action Plan #4 spillway including increasing leakage into the gallery or piezometer readings outside alarm levels
56 Review Date - September 2020 Awoonga Dam Emergency Action Plan
Table 5.18 : Action Plan 5: Earthquake: Incident Manager
Activation Levels Actions
Alert Incident Manager not activated at Alert Level. Earthquake MMI ≥ 4 OR Richter scale >4 (Light earthquake)
• Receive advice from Incident Coordinator.
• Undertake program of regular updates and notifications as per Notification Table 4 (Table 7.6) • Maintain a register of all external communications. • Assist in preparation of a media statement for CEO in conjunction with relevant communications protocols. • Issue updates to Staff as per Notification Table 4 (Table 7.5). Lean Forward • If damage or signs of distress to main embankment or saddle dams including increasing cloudy Earthquake MMI ≥6 (Strong seepage, move to Action Plan 2: Loss of Containment. earthquake) • If damage or signs of distress to Taragoola Bunds including increasing cloudy seepage, move to Action Plan 3: Loss of Containment (Taragoola). • If damage or signs of distress to spillway including increasing leakage into the gallery or multiple piezometer readings outside alarm levels, move to Action Plan 4: Unusual instrument readings.
• If dam appears to have stabilised, confirm with the Dam Safety Consultant prior to de-escalation.
• Advise Incident Management Team of any changes to active Action Plan/s and Activation Level/s.
Stand Up • As per previous activation level AND • Earthquake MMI ≥ 7 OR • Evacuations to commence if dam failure anticipated. Issue notifications and warnings according to • Earthquake MMI< 7 Notification Table 1 (Table 7.2). AND possible failure • Evacuations to commence if it is not possible to inspect the bunds or damage is considered serious path identified enough. Issue notifications and warnings according to Notification Table 3 (Table 7.4).
• Assess information obtained from the Incident Coordinator. Stand Down • If the event escalated to Stand Up, review EER and submit to DNRME for review within 30 business Risk reduced to acceptable days. level • Advise all involved of event closure according to Notification Table 1 (Table 7.2). • Prepare media statement for CEO in conjunction with relevant communications protocols if required.
Review Date – September 2020 57 Awoonga Dam Emergency Action Plan
Table 5.19 : Action Plan 5: Earthquake: Incident Coordinator
Activation Levels Actions
• Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix E.
• Following an earthquake, a text message will be sent to the Operations Unit Manager in accordance with SOP030 Earthquake Alarm Service. If earthquake equivalent to MMI ≥ 4, mobilise Incident Coordinator / Dam Site Inspector to site for immediate inspection of dam and appurtenant structures. • If earthquake equivalent to MMI <4, mobilise Incident Coordinator / Dam Site Inspector to site within 48 hours for inspection of dam and appurtenant structures.
• Seek specialist advice on the situation from qualified persons (Dam Safety Consultant). • If a Dam Safety Consultant is required, engage, coordinate the process and manage site activities accordingly.
• Receive and review information on the conditions of the dam and appurtenant structures from Dam Site Inspector and Dam Safety Consultant. Alert • Earthquake MMI ≥ 4 OR Undertake program of regular updates and notifications as per Notification Table 4 (Table 7.5). Richter scale >4 • Maintain a register of external communications. (Light earthquake) • Assist in preparation of a media statement for CEO in conjunction with relevant communications protocols if required. • Issue updates to Staff as per Notification Table 4 (Table 7.5).
• If damage or signs of distress to main embankment or saddle dams including increasing cloudy seepage, activate Action Plan 2: Loss of Containment. • If damage or signs of distress to Taragoola Bunds including increasing cloudy seepage, activate Action Plan 3: Loss of Containment (Taragoola). • If damage or signs of distress to spillway including increasing leakage into the gallery or multiple piezometer readings outside alarm levels, activate Action Plan 4: Unusual instrument readings. • If dam appears to have stabilised, monitor the situation and confirm with the Dam Safety Consultant prior to de-escalation to Stand Down. • Advise Incident Management Team of any changes to Active Action Plan/s and Activation Level/s.
• As per previous activation level, AND
• Implement specialised advice and further monitoring of the dam as advised by the Dam Safety Consultant. Lean Forward • Organise for surveying of surveillance marks at the earliest opportunity and analysis of the results by Earthquake MMI ≥6 (Strong Dam Safety Consultant. earthquake) • Monitor the situation and continually relay the situation back to the Incident Manager. Note any changes. • If damage or signs of distress are identified, make recommendations to Incident Manager on appropriate Action Plans to activate. (See Alert escalations).
Stand Up • As per previous activation level, AND • Earthquake MMI ≥ 7 OR • If damage is considered serious enough, advise Incident Manager to commence evacuations • Earthquake MMI< 7 according to Notification Table 4 (Table 7.5). AND possible failure path identified • Monitor the situation and confirm with the Dam Safety Consultant and Dam Safety Inspector prior to Stand Down recommending event closure to Incident Manager. Risk reduced to acceptable • Review records and reports. Compile an Incident Report, or EER (if event escalated to Stand Up) and level submit to Incident Manager. • Issue updates to Staff as per Notifications Table 5.
Review Date – September 2020 58 Awoonga Dam Emergency Action Plan
Table 5.20 : Action Plan 5: Earthquake: Dam Site Inspector
Activation Levels Actions
• Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix E.
• Initiate an immediate detailed inspection of the dam and associated structures: 1. Assess for change in leakage rates from embankment and spillway gallery 2. Inspect access bridge across spillway channel, to the pump station and old outlet tower for damage / displacement 3. Check for cracking / movement of the spillway and adjacent concrete structures 4. Check for slumping of the spillway and discharge channel walls 5. Inspect upstream concrete slab and downstream embankment rockfill for movement, slumping or displacement Alert 6. Inspect old outlet tower for damage, including to internal pipework Earthquake MMI ≥ 4 OR 7. Check all instrument readings 12-hourly until directed otherwise Richter scale >4 8. Check pump station including all internal pipework and mechanical systems (Light earthquake) 9. Assess for damage to other buildings and electrical / mechanical systems 10. Inspect the Saddle Dams and Taragoola Quarry bund for deformation or damage. Inspect the embankments and abutments for springs, deformation, erosion, foundation movement or displacement 11. Check for signs of slumps, boils and erosion on the downstream face of the bund • Use photographs and written descriptions of damage. Note the time, date, and location. • On detection of increased rates of leakage or damage to the dam, advise Incident Coordinator immediately. • Monitor water level in Pit 3 via remote monitoring looking for a change of water level. On detection of leakage through the Taragoola Quarry bund advise Incident Coordinator.
• As per previous activation level. • Increase frequency of dam inspections (at least every 4 hours or as directed). Arrange lighting if and Lean Forward as required. Earthquake MMI ≥6 (Strong • If damage or seepage is observed, notify the Incident Coordinator immediately providing details of earthquake) observations. Prepare to move to Action Plan relevant to observation. • Assist Incident Coordinator or Dam Safety Consultant as required.
• As per previous activation level. Stand Up • Review inspection and monitoring regime and intensify frequency as advised by Incident Coordinator • Earthquake MMI ≥ 7 OR / Dam Safety Consultant. • Earthquake MMI< 7 • Regularly update the Incident Coordinator with progress. AND possible failure • If dam failure is observed, evacuations are to commence. See Notification Table 4 (Table 7.5). path identified • If it is not possible to inspect the bunds or failure is observed, evacuations are to commence. See Notification Table 4 (Table 7.5).
Stand Down • Immediately following the event, submit records and reports to the Incident Coordinator for review. Risk reduced to acceptable level
Review Date – September 2020 59 Awoonga Dam Emergency Action Plan
Table 5.21 : Action Plan 5: Earthquake: Dam Safety Consultant
Activation Levels Actions
• Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix D. Alert Earthquake MMI ≥ 4 OR • Assess any damage, seepage or anomalous instrument readings and inspect the dam. Richter scale >4 • Advise Incident Coordinator of situation, observation and results. (Light earthquake) • Assist Incident Coordinator as required.
Lean Forward • As per previous activation level. Earthquake MMI ≥6 (Strong • Assess survey of surveillance marks and provide report. earthquake)
Stand Up • As per previous activation level. • Earthquake MMI ≥ 7 OR • Earthquake MMI< 7 AND possible failure path identified • Provide report to Incident Coordinator as required, including any repair work identified as required. Stand Down Risk reduced to acceptable level
Review Date – September 2020 60 Awoonga Dam Emergency Action Plan
5.8 Action Plan 6: Structural Damage
A high energy impact to the dam could occur via a plane crash or heavy machinery accident on site. This could cause damage to the dam leading to an increased likelihood of failure.
This failure mode could affect the main embankment, saddle dams, spillway structure or Taragoola bunds, leading to rapid flooding of downstream properties (Figure G.3) or the Taragoola Quarry (Figure G.4). Error! Reference source not found. provides an overview of the decision processes and thresholds for escalation and de-escalation during a structural damage event.
Factors which could materially increase the likelihood of activation of this Action Plan include: • Adverse trend identified hydrostatic pressure readings. • History of instrument failure or error (uncorrected).
5.8.1 Inspections and data review
Analysis of available data and inspections of the dam are an essential part of this Action Plan. In addition to visual inspections of the dam, a series of data is available via the telemetry system. The telemetry system is available to GAWB personnel via the intranet. The following instrument readings are available: • Piezometers: - All gallery piezometers are connected to the telemetry system. - Data is collected weekly but can be accessed at 4 hour intervals and instantaneously. - Piezometer alarm limits are noted in SOP033. • V Notch Weirs: - The V-notch weir adjacent to the river discharge pit is to be checked and if necessary read manually on a daily basis, but would typically be flooded due to high tailwater levels in a flood event. - The 3 gallery V notch weirs have continuous reading outputs accessible via telemetry.
5.8.2 Individual Action Plans
Table 5.22 to Table 5.25 provide individual Action Plans for the Incident Manager, Incident Coordinator, Dam Site Inspector and Dam Safety Consultant.
Review Date – September 2020 61 Awoonga Dam Emergency Action Plan
Figure 5.8: Action Plan 6: Structural Damage: Decision Process
Notifications according to Notification Table #4 START
Incident (any type) reported to YES GAWB YES
Incident with potential to damage Major damage NO threating structural dam or minor NO damage to dam integrity or ptential loss of containment
Notify DNRME/LDMG/staff YES Notify /Taragoola Quarry YES DNRME/LDMG/staff /Taragoola Quarry
LEAN FORWARD (IM)
Evacuate Taragoola Quarry if Monitor situation inspection not possible or bund (IC/DSI/DSC) Monitor situation (IC/DSI/DSC) failure anticipated (IM)
Evacuate if dam breach anticipated SDCC/LDMG/Pikes Crossing/DS to Dam stablised North Coast Rail (IM) Confirm risk reducted to Dam stablised YES and risk acceptable level (DSC) YES and risk reduced Confirm risk reducted (DSC) reduced
Emergency (000) if breach immiant and no prior warnings
STAND DOWN (IC) NO NO
Activiate EAP Action Plan #2 Damage or signs of distress to main embankment or saddle dams including cloudy seepage
Close out and report (IM) Activate EAP Action Plan #3 Damage or signs of distress to Taragools bunds including increasing cloudy seepage
END
Activiate EAP Action Plan #4 Damage or signs of distress to spillway including increasing leakage into the gallery or piezometer readings outside alarm levels
62 Review Date - September 2020 Awoonga Dam Emergency Action Plan
Table 5.22 : Action Plan 6: Structural Damage: Incident Manager
Activation Levels Actions
Alert NA. NA
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E.
• Undertake program of regular updates and notifications as per Notification Table 4 (Table 7.5). • Maintain a register of all external communications. • Prepare media statement for CEO in conjunction with relevant communications protocols if required. • Issue updates to Staff as per Notification Table 4 (Table 7.5).
Lean Forward • Receive advice from Incident Coordinator on status of dam inspections and damage to the dam. Incident with potential for • If damage or signs of distress to main embankment or saddle dams including increasing cloudy damage to dam occurs OR seepage, activate Action Plan 2: Loss of Containment. Minor damage to dam • If damage or signs of distress to Taragoola Bunds including increasing cloudy seepage, activate Action Plan 3: Loss of Containment (Taragoola). • If damage or signs of distress to spillway including increasing leakage into the gallery or multiple piezometer readings outside alarm levels, activate Action Plan 4: Unusual instrument readings. • If dam appears to have stabilised, confirm with the Dam Safety Consultant prior to de-escalation to Stand Down. • Advise Incident Management Team of any changes to Active Action Plan/s and Activation Level/s.
• As per previous activation level, AND Stand Up • Evacuations to commence if dam failure anticipated. Issue notifications and warnings according to Major damage threatening Notification Table 4 (Table 7.5). structural integrity / potential • Evacuations to commence if it is not possible to inspect the bunds or damage is considered serious loss of containment enough. Issue notifications and warnings according to Notification Table 3 (Table 7.4).
• Assess information obtained from the Incident Coordinator. Stand Down • If the event escalated to Stand Up, review EER and submit to DNRME for review within 30 business Risk reduced to acceptable days. level • Advise all involved of event closure according to Notification Table 4 (Table 7.5). • Prepare media statement for CEO in conjunction with relevant communications protocols if required
Review Date – September 2020 63 Awoonga Dam Emergency Action Plan
Table 5.23 : Action Plan 6: Structural Damage: Incident Coordinator
Activation Levels Actions
Alert NA. NA
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E.
• Mobilise Dam Site Inspector to site in order to undertake inspections. • Assess data from Dam Site Inspector.
Lean Forward • If required, commission a Dam Safety Consultant to provide specialist advice on the situation and Incident with potential for request a ‘Specialist Inspection’. Assist Dam Safety Consultant as required. damage to dam occurs OR • Relay details of the situation to Dam Safety Consultant. Minor damage to dam • Assist Dam Safety Consultant with regard to inspection, monitoring and reporting as required. • Review need for and frequencies of further inspections or monitoring.
• Monitor the situation and continually relay the situation back to the Incident Manager.
• If damage or signs of distress are identified, make recommendations to Incident Manager on appropriate Action Plans to activate.
• As per previous activation level AND Stand Up • Implement specialised advice and further monitoring of the dam as advised by the Dam Safety Major damage threatening Consultant. structural integrity / potential • Organise for surveying of surveillance marks at the earliest opportunity and analysis of the results loss of containment- extreme by Dam Safety Consultant. risk rating • Keep Incident Manager informed of situation and developments.
• Monitor the situation and confirm with the Dam Safety Consultant and Dam Safety Inspector prior to recommending event closure to Incident Manager. Alert • Review records and reports. Compile an Incident Report, or EER (if event escalated to Stand Up) NA and submit to Incident Manager. • Issue updates to Staff as per Notification Table 4 (Table 7.5).
Review Date – September 2020 64 Awoonga Dam Emergency Action Plan
Table 5.24 : Action Plan 6: Structural Damage: Dam Site Inspector
Activation Levels Actions
Alert NA. NA
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E.
• Organise for closure of affected roads, if not already closed by others.
• Undertake onsite monitoring if safe conditions exist. • Perform inspection of the affected structure/s (dam, spillway and/or bunds) on a regular basis (at Lean Forward least twice daily or as directed). Advise Incident Coordinator of results of inspections and observations. Incident with potential for damage to dam occurs OR • Determine if there is any leakage. Observe and record leakage hourly until directed otherwise. Identify any areas where leakage is higher than normal, or turbid. Identify any trends of leakage rate Minor damage to dam (particularly if the leakage rate is increasing or a change in the rate of leakage). Advise Incident Coordinator of observations. • If damage, seepage or leakage is observed, notify the Incident Coordinator immediately providing details of observations. Prepare to move to Action Plan relevant to observation. • Assist Incident Coordinator or Dam Safety Consultant as required. • Monitor the situation and continually relay the situation back to the Incident Coordinator.
Stand Up • As per previous activation level AND Major damage threatening • Increase frequency of dam inspections (at least every 4 hours or as directed). Arrange lighting if structural integrity / potential and as required. loss of containment- extreme • If dam failure is observed, evacuations are to commence. See Notification Table 4 (Table 7.5). risk rating • If it is not possible to inspect the bunds or failure is observed, evacuations are to commence. See Stand Up Notification Table 4 (Table 7.5). Major damage threatening structural integrity / potential loss of containment
Stand Down • Immediately following the event, submit records and reports to the Incident Coordinator for review. Risk reduced to acceptable level
Review Date – September 2020 65 Awoonga Dam Emergency Action Plan
Table 5.25 : Action Plan 6: Structural Damage: Dam Safety Consultant
Activation Levels Actions
Alert NA. NA • Lean Forward Maintain a log of the event, actions and directives. A report log pro-forma is located in Appendix D. Incident with potential for • Inspect affected structures (dam, spillway and or bunds) for damage. damage to dam occurs OR • Advise Incident Coordinator of situation, observation and results. Minor damage to dam • Assist Incident Coordinator as required.
Stand Up • As per previous activation level. Major damage threatening structural integrity / potential loss of containment- extreme risk rating • Provide report to Incident Coordinator as required, including any repair work identified as required. Stand Down Risk reduced to acceptable level
Review Date – September 2020 66 Awoonga Dam Emergency Action Plan
5.9 Action Plan 7: Terrorism
A terrorist threat, or activity could increase the likelihood of failure of the dam. This could affect any part of the dam. Failure of the main embankment, saddle dams or spillway could cause rapid flooding of downstream properties (Figure G.3) while failure of the Taragoola Bunds would affect the Taragoola Quarry (Figure G.4) both located in Appendix G. Error! Reference source not found. provides an overview of the decision processes and thresholds for escalation and de-escalation during a suspected or confirmed terrorist event.
The main factors which could materially increase the likelihood of activation of this Action Plan is an elevated terrorism alert level e.g Stakeholder Security Alert from Queensland Police, or from National Terrorism Threat Advisory System.
5.9.1 Inspections and data review
The approach of this Action Plan is to monitor any threat or damage from afar until the threat is abated and it is safe to inspect for potential damage. Evacuation is advised at any time if damage is suspected. Following abatement of the terror threat, any damage to the dam can be treated through Action Plan 6: Structural Damage.
A series of data is available via the telemetry system which can be monitored without accessing the dam if unsafe. The telemetry system is available to GAWB personnel via the intranet. The following instrument readings are available: • Piezometers: - All gallery piezometers are connected to the telemetry system. - Data is collected weekly but can be accessed at 4 hour intervals and instantaneously. - Piezometer alarm limits are noted in SOP033. • V Notch Weirs: - The V-notch weir adjacent to the river discharge pit is to be checked and if necessary read manually on a daily basis, but would typically be flooded due to high tailwater levels in a flood event. - The 3 gallery V notch weirs have continuous reading outputs accessible via telemetry.
5.9.2 Individual Action Plans
Table 5.26 to Table 5.29 provide individual Action Plans for the Incident Manager, Incident Coordinator, Dam Site Inspector and Dam Safety Consultant.
Review Date – September 2020 67 Awoonga Dam Emergency Action Plan
Figure 5.9: Action Plan 7: Terrorism: Decision Process
START Notifications according to Notification Table #5
Terrorist incident or threat YES identified through Security Tisk YES Management Plan protocols Confirmed terrorist activity Possible terrorist OR large explosion activity observed heard/pbserved at dam OR NO OR treat failure in progress or likely received due to impact or explosion or threat
Notify DNRME/LDMG/staff YES /Taragoola Notify Quarry/National DNRME/LDMG/staff YES Security Hotline /Taragoola Emergency (000) Quarry/National (IM) Security Hotline Emergency (000) LEAN FORWARD (IM) (IM)
Monitor situation Evacuate Taragoola Quarry if (IC/DSI/DSC) inspection not possible or bund failure anticipated (IM)
NO Monitor situation (IC/DSI/DSC) Evacuate if dam breach anticipated SDCC/LDMG/Pikes Threat Crossing/DS to North Coast Rail Abated (IM) NO
YES Threat Abated Emergency (000) if breach imminent and no prior warnings
YES
NO YES
Activiate EAP Action Plan #6 STAND DOWN (IM) Structural Damage (IM)
Close out and report (IM)
END
Review Date - September 2020 68 Awoonga Dam Emergency Action Plan
Table 5.26 : Action Plan 7: Terrorism: Incident Manager
Activation Levels Actions
Alert NA
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E.
• Monitor the situation and continually relay the situation back to the Incident Coordinator. Lean Forward • Undertake program of regular updates and notifications as per Notification Table 5 (Table 7.8 Possible terrorist activity • Maintain a register of all external communications. observed OR • Prepare media statement for CEO in conjunction with relevant communications protocols if Threat received required.
• If damage to the dam has occurred escalate to Stand Up and inform Incident Management Team. • Once threat is abated, and safe to inspect dam, move to T6 Structural Damage.
Stand Up • As per previous activation level. Confirmed terrorist activity OR Large explosion heard/observed at dam (bomb explosion, aircraft hit) OR Failure in progress or likely due to impact or explosion or threat
Stand Down • Assess information obtained from the Incident Coordinator. Risk reduced to acceptable • If the event escalated to Stand Up, review EER and submit to DNRME for review within 30 level business days. • Advise all involved of event closure according to Notification Table 5 (Table 7.6). • Prepare media statement for CEO in conjunction with relevant communications protocols if required.
Review Date – September 2020 69 Awoonga Dam Emergency Action Plan
Table 5.27 : Action Plan 7: Terrorism: Incident Coordinator
Activation Levels Actions
Alert NA. NA
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E. • Record all communications.
• Issue updates to Staff as per Notification Table 5 (Table 7.6). Lean Forward • If Police appoint an incident manager support and follow instruction. Possible terrorist activity • Relay information to Incident Manager. observed OR Threat received • If required, commission a Dam Safety Consultant to provide specialist advice on the situation. • Relay details of the situation to Dam Safety Consultant. • Assist Dam Safety Consultant as required.
• If any suspicious behaviour noticed, or threat received, contact National Security Hotline immediately and commence notifications as per Notification Table 5 (Table 7.6).
Stand Up • As per previous activation level AND Confirmed terrorist activity OR • Large explosion Evacuations to commence if dam failure anticipated. Issue notifications and warnings according to heard/observed at dam (bomb Notification Table 5 (Table 7.6). explosion, aircraft hit) OR • Evacuations to commence if it is not possible to inspect the Taragoola bunds or damage to the Failure in progress or likely bunds is considered serious enough. Issue notifications and warnings according to Notification due to impact or explosion or Table 5 (Table 7.6). threat • Be on standby to move to T6 Structural Damage as soon as threat is abated and safe to inspect dam.
Stand Down • Monitor the situation and confirm with the Dam Safety Consultant and Dam Safety Inspector prior to Risk reduced to acceptable recommending event closure to Incident Manager. level • Review records and reports. Compile an Incident Report, or EER (if event escalated to Stand Up) and submit to Incident Manager. • Issue updates to Staff as per Notification Table 5 (Table 7.6).
Review Date – September 2020 70 Awoonga Dam Emergency Action Plan
Table 5.28 : Action Plan 7: Terrorism: Dam Site Inspector
Activation Levels Actions
Alert • Check CCTV system at the Dam NA
• Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Include photographs where possible. A report log pro-forma is located in Appendix E. • Record all communications. Lean Forward • If Police appoint an incident manager support and follow instruction. Possible terrorist activity • Ensure all security measures are in place (locked gates, etc.). observed OR • Close any affected roads, if not already closed by others. Threat received • If safe to do so, inspect dam and saddle dams. Report observations to Incident Coordinator. • If any suspicious behaviour noticed, immediately notify Incident Coordinator. • Monitor the situation and continually relay the situation back to the Incident Coordinator.
Stand Up • As per previous activation level, AND Confirmed terrorist activity • Be on standby to move to T6 Structural Damage as soon as threat is abated and safe to inspect OR Large explosion dam. heard/observed at dam • If dam failure is observed, evacuations are to commence. See Notification Table 5 (Table 7.6). (bomb explosion, aircraft hit) • OR If it is not possible to inspect the bunds or failure is observed, evacuations are to commence. See Notification Table 5 (Table 7.6). Failure in progress or likely due to impact or explosion or threat
Stand Down • Immediately following the event, submit records and reports to the Incident Coordinator for review. Risk reduced to acceptable level
Review Date – September 2020 71 Awoonga Dam Emergency Action Plan
Table 5.29 : Action Plan 7: Terrorism: Dam Safety Consultant
Activation Levels Actions
Alert NA. NA
Lean Forward • Maintain a log of the event, actions and directives. Record all relevant events in the Incident Log. Possible terrorist activity Include photographs where possible. A report log pro-forma is located in Appendix E. observed OR • Provide advice on likelihood of failure progression based on threat. Threat received
Stand Up • As per previous activation level, AND Confirmed terrorist activity OR • If possible, scope all urgent repair work. Large explosion heard/observed at dam (bomb • Consult with Incident Coordinator regarding instigation and organisation of repairs, as safe to do explosion, aircraft hit) OR so. Failure in progress or likely due to impact or explosion or threat
Stand Down • Provide report to Incident Coordinator as required, including any repair work identified as required Risk reduced to acceptable or completed. level
Review Date – September 2020 72 Awoonga Dam Emergency Action Plan
6. Communications
This section details the protocols and procedures for external communications during an event. This includes notifications and warnings. Internal communications within the Incident Management Team are detailed within the appropriate Action Plans.
6.1 Communications Protocols
Figure 6.1 identifies the lines of communications during an event.
Media communications will be undertaken by the CEO. In events where the LDMG is activated, the LDMG should be consulted in the preparation of any media releases. Similarly, where an event affects the water supply for GRC, GRC should be consulted in the preparation of any media releases.
Communications with the Taragoola Quarry are operational in nature and are conducted by the Incident Coordinator. All other external communications (notifications and warnings) are the responsibility of the Incident Manager. In the Alert Stage, the Incident Manager is not activated. At this level of activation, the Incident Coordinator is responsible for all external communications.
Figure 6.1 : External Communications Protocols
6.2 Notification Groups
Groups of affected parties who may be harmed by events considered within this EAP have been grouped to allow for effective notification and warning protocols. Figure 6.2 identifies the physical location of each group while Table 6.1 provides details on each group.
Contact details of residents within each group and key contacts at each entity are contained within the ECP (Appendix B).
Review Date – September 2020 73 Awoonga Dam Emergency Action Plan
Table 6.1 : Notification Groups: Affected Residents and Entities
Entity responsible for Group Name Description notification / warning
Downstream Properties Approximately 11 properties located upstream of Pikes Crossing. The crossing becomes cut at a lake level of 40.3 mAHD at which point GAWB opens an alternative access via the Awoonga Dam Pump Station to maintain access for these Pikes Crossing Properties GAWB (IC/IM) properties. At a lake level of 42.5 mAHD the alternative access is no longer passable and these properties are isolated. Evacuation to higher ground is required from a lake level of 44.7 mAHD, with properties identified as Group A.
Approximately 10 properties downstream of Pikes Crossing. These properties Downstream to North experience inundation from a lake level of 44.7 mAHD. Evacuations commence from GAWB (IC/IM) Coast Rail Properties this level. These properties are grouped by B, D, F, G & H.
These areas may include Benaraby, Boyne Island, Bruce Highway and Tannum Properties Downstream of Sands. Above a lake level of 46.2 mAHD residents may be subject to evacuations LDMG North Coast Rail managed by the LDMG.
Upstream Properties Access to the Boynedale Bush Camp via Gladstone Monto Road is cut at a lake level Boynedale Bush Camp GAWB (DSI) of approximately 41.5 mAHD.
Residents of the Boyne Valley (communities of Ubobo, Nagoorin, Builyan and Many Peaks) become isolated from Gladstone due to Lake Awoonga levels when the dam Boyne Valley Residents / reaches 41.5 mAHD. GAWB land surrounding the lake, also accessed by Gladstone- GAWB (IC/IM) Agistees Monto Road, is agisted. Two upstream properties (group C & E) require evacuation at elevated lake levels .
Recreation Area Lease This includes the Boat and Leisure Hire, Caravan Park, Scout Camp, Bow Hunters GAWB (IC/IM) Holders and Ski Club. These areas are closed once the lake level reaches 41.5 mAHD.
Taragoola Quarry The lime quarry is operated by Sibelco and becomes isolated due to localised flooding GAWB (IC) before lake levels impact the site. Due to its location, GAWB monitors the quarry for leakage. Leakage is possible into Taragoola Quarry at a lake level of 47.0 mAHD.
Entities
LDMG Regular notifications and situational updates are provided to the LDMG to facilitate GAWB (IC/IM) broader disaster management and evacuations.
SDCC The State Disaster Coordination Group (SDCG) coordinates the operational delivery GAWB (IC/IM) of the Queensland Disaster Management Committee legislative responsibilities to facilitate response operations for Queensland communities. The SDCC will be contacted to activate the Emergency Alert Polygon.
DNRME Regular notifications and situational updates are provided to the Dam Safety GAWB (IC/IM) Regulator from Alert onwards, as well as through the DNRME hotline.
SunWater SunWater operates a Pump Station at Awoonga Dam to supply Callide. Electrical GAWB (IC) isolations will occur from 44.7m and SunWater operators notified.
Gladstone WTP Gladstone WTP may be affected by water shortages from 42.5 mAHD when power to GAWB (IC) the intake tower is disconnected.
National Security Hotline The National Security Hotline (1800 1234 00) is a free phone number that connects to GAWB (IM) the authorities to report possible terrorist activities. The Hotline operates 24 hours a day, seven days a week. Any threat of terrorism received, or suspected terrorist activity will be reported to the National Security Hotline.
Review Date – September 2020 74 Awoonga Dam Emergency Action Plan
Entity responsible for Group Name Description notification / warning
QPS – Counter Terrorism The role of the Counter Terrorism Liaison Officer is to provide a key point of contact GAWB (IM) Liaison Officer for coordination in a suspected or confirmed terrorism situation.
Emergency Services (000) If critical, 000 will be called and immediate evacuation downstream of Awoonga Dam GAWB (IM) (and Saddle Six/Taragoola if necessary) requested, depending on circumstances.
GAWB Staff It is important that GAWB personnel outside of the Incident Management Team are GAWB (IC) aware of the status of disaster management activities.
Under the Queensland Disaster Management Arrangements, the LDMG is responsible for disaster management at the community level. GAWB, as the owner of Awoonga Dam, is responsible for providing the LDMG information on dam conditions and outflows to the LDMG to allow them to provide effective notifications and warnings to the public. In addition, GAWB directly notifies affected residents immediately downstream of the dam, and upstream residents who become isolated at elevated lake levels.
As part of preparation of the AWD EAP, GAWB and the LDMG have agreed the following delineation of notification/warning responsibilities: • GAWB: - Residents upstream of North Coast Rail (including Pikes Crossing) - Boyne Valley Residents (upstream) - Affected Entities • LDMG: - Residents downstream of North Coast Rail
6.3 Communication Mechanisms
Preferred methods of contact and standard message templates have been identified and included in the GAWB ECP, for easy reference during events. Available communication methods for notifications and warnings include: • Phone call to landline or mobile phone • SMS to mobile phone • Email • GAWB App • UHF / VHF radio • Door knocking • Media releases / radio • Social media • Emergency Alert Polygon
The GAWB App is a Smart Phone App that affected parties can opt to download and use. It provides an alternative communication channel during an emergency. The benefit of the App is that it requires minimal phone coverage to send and receive messages as compared to emails, websites or social media such as Facebook and it is an app to app communication meaning it is almost immediate.
During an emergency event, it is likely that telecommunications coverage will be affected to some degree.
Review Date – September 2020 75 Awoonga Dam Emergency Action Plan
Figure 6.2 : Map of Notification Groups
Review Date – September 2020 76 Awoonga Dam Emergency Action Plan
Communication with the LDMG will be in accordance with the agreements made during preparation of this plan and described in Sections 1.3, 3.1 and 6.3 of this plan. During flood events, the LDMG will be provided regular updates according to Notification Table 1 (Table 7.2) via the Spilling Events Communications Notice. During non-flood events, the LDMG will be provided regular updates according to the relevant Notification Table via the Non-Flood Event Communications Notice. Templates are provided in Appendix E. Critical emergency communications, such as requests for evacuations, will be via direct contact (i.e. phone) with email follow-up.
Notifications to the public will generally be via SMS or email according to the standard messages outlined in the ECP.
In the event that dam breach is anticipated, GAWB can activate the Emergency Alert Polygon lodged with the SDCC. This triggers an SMS / text to speech message to all landlines and mobiles located within the lodged impact area polygon. This polygon includes the areas downstream of the dam anticipated to be impacted for a dam failure during a PMF event. Procedures, mapping of the polygon area, and the template message are contained within the Emergency Communications Plan and have been replicated in Appendix C of the EAP. These procedures, and the pre-loaded polygon and template, are reviewed and tested annually as part of the pre-wet season checks included in the Cyclone Management Plan.
Review Date – September 2020 77 Awoonga Dam Emergency Action Plan
7. Notification Tables
This section provides notification tables for each of the events considered in the AWD EAP.
Each table identifies: • Which notification group (as identified in Section 6.2) is to be notified/warned • What triggers a notification/warning • Frequency of contact • Priority if a single trigger requires contact with multiple parties • Who is responsible for the contact (generally Incident Manager) • Purpose, frequency and method of notification
As described in Section 6.2 and 6.3, these tables identify the groups of residents and entities to be contacted. A reference to the standard message to be used is included. Individual contact details and standard message content are provided in the ECP (Appendix B).
Five notification tables have been developed for the seven dam hazards dealt with in this plan, based on similar affected areas. Table 7.1 identifies the relevant Notification Plan for each Action Plan, or dam hazard.
Table 7.1 : Action Plan – Notification Table Reference Table
Action Plan Relevant Notification Table
Section 5.3: Action Plan 1: Flood Inflows Table 7.2 : Notification Table 1: Flood Inflows
Section 5.4: Action Plan 2: Loss of Containment (Main Table 7.3 : Notification Table 2: Loss of Containment / Abnormal Embankment, Saddle Dams) Instrument Readings
Section 5.5: Action Plan 3: Loss of Containment (Taragoola) Table 7.4 : Notification Table 3: Loss of Containment (Taragoola Bunds)
Table 7.3 : Notification Table 2: Loss of Containment / Abnormal Section 5.6: Action Plan 4: Unusual Instrument Readings Instrument Readings
Section 5.7: Action Plan 5: Earthquake Table 7.5 : Notification Table 4: Earthquake / Structural Damage
Section 5.8: Action Plan 6: Structural Damage Table 7.5 : Notification Table 4: Earthquake / Structural Damage
Section 5.9: Action Plan 7: Terrorism Table 7.6 : Notification Table 5: Terrorism
Table 7.2 identifies notification protocols for flood inflow events.
The AWD EAP is activated for lake levels above 40.3 mAHD. This represents 300 mm flow over the spillway and causes the closure of Pikes Crossing Road downstream of the dam.
Procedures for flood inflows and spillway flows for lake levels below 40.3 mAHD are outlined in SOP 034: Minor Flooding Actions. This includes initial notifications for Pikes Crossing residents. It is expected that these notifications will be complete prior to activation of the EAP. If this is not the case, these early notifications must be completed on escalation to Alert status.
Review Date – September 2020 78 Awoonga Dam Emergency Action Plan
Table 7.2 : Notification Table 1: Flood Inflows
Activation Notification Trigger Priority Notification To Frequency Purpose Method Level From
ALERT Stage Activated
1 IC LDMG, DNRME ONCE Notify of situation and EAP Status Email Spilling Event Communications Sheet Copy to DNRME Alert Stage commenced Alert 2 IC GAWB Staff ONCE Notify of situation and EAP Status Email: Staff Notification #2 3 DSI Boynedale Bush Camp ONCE Evacuation before lake at 41.0 mAHD Site visit/ evacuation/locking of gates
Ongoing 1 IC LDMG 24 hourly Notify of situation and EAP Status Email Spilling Event Communications Sheet
ALERT: Levels Going Up
Level increasing, IC Pikes Crossing 24 hourly Alternative access will be closed at Email / GAWB App / SMS >40.3 mAHD, predicted to 42.5 mAHD PC Event Notification #2 exceed 42.5 mAHD
Alert Level increasing, IC Recreation Area Lease 24 hourly Dam closure will occur at 42.5mAHD Email / GAWB App / SMS >40.3 mAHD Holders RA Event Notification #1
Level predicted to exceed IC Boyne Valley 24 hourly Calliope Monto Road likely to be flood Email / GAWB App / SMS 41.5 mAHD affected BV Event Notification #1
ALERT: Levels Going Down
Predicted to fall below IC Pikes Crossing 24 hourly Dam levels expected to fall below Email / GAWB App / SMS 40.3mAHD 40.3 mAHD PC Event Notification #6 Alert Monto-Calliope Rd IC Boyne Valley ONCE Calliope Monto Road re-opened Email / GAWB App / SMS re-opened BV Event Notification #2
LEAN FORWARD Stage Activated
Notify of situation and EAP Status Email Spilling Event Communications Sheet 1 IM LDMG, DNRME 12 hourly Copy to DNRME
Lean Lean Forward Stage Notify of developing situation and possible 2 IC Taragoola Quarry ONCE Phone/Email as appropriate Forward commenced inundation of quarry access Email: Staff Event Notification #2 3 IC Staff 12 hourly Provide update of current situation
Review Date – September 2020 79 Awoonga Dam Emergency Action Plan
Activation Notification Trigger Priority Notification To Frequency Purpose Method Level From
LEAN FORWARD: Levels Going Up
Calliope Monto Road likely to be flood Email / GAWB App / SMS Level > 41.5 mAHD IM Boyne Valley 24 hourly affected BV Event Notification #1
Level <42.5 mAHD, IM Pikes Crossing 24 hourly Alternative access will be closed at Email / GAWB App / SMS predicted to exceed 42.5 mAHD PC Event Notification #3 42.5 mAHD
List of persons staying at Email Spilling Event Communications Sheet & Notify LDMG regarding persons staying at recreation area has been IM LDMG ONCE Register of Persons Staying at the Recreation the recreation area completed (~42.0 mAHD) Area
Notify that intake tower will not be Lean 1 IC Gladstone WTP ONCE Phone/Email as appropriate Forward operational until safe to reinstate power HV substation isolated Notify that power to intake of the pump 2 IM SunWater ONCE Email (before 42.5 mAHD) station has been isolated
Notify LDMG of possible need for water 3 IM LDMG ONCE Phone/Email as appropriate restrictions if flood levels continue to rise
Email / GAWB App / SMS 1 IM Pikes Crossing ONCE Alternative access now closed PC Event Notification #4 Level at 42.5 mAHD Recreation Area Lease Email / GAWB App / SMS 2 DSI ONCE Recreation area is now closed. Holders RA Flood Notification #2
LEAN FORWARD: Levels Going Down Level < 42.5 mAHD and Email / GAWB App / SMS alternate access re- IM Pikes Crossing ONCE Alternative access re-opened PC Event Notification #5 opened.
IM Pikes Crossing 24 hourly Dam levels expected to fall below Email / GAWB App / SMS Lean Level predicted to fall 40.3 mAHD Forward below 40.3mAHD PC Event Notification #6 Calliope Monto Road likely to be flood Email / GAWB App / SMS Level > 41.5 mAHD IM Boyne Valley 24 hourly affected BV Event Notification #1
Review Date – September 2020 80 Awoonga Dam Emergency Action Plan
Activation Notification Trigger Priority Notification To Frequency Purpose Method Level From
Stand Up Stage Activated
Notify of situation and EAP Status Email Spilling Event Communications Sheet 1 IM LDMG, DNRME 6 hourly Copy to DNRME Commencement of Stand Stand Up As Update Taragoola Quarry of situation. up Stage 2 IC Taragoola Quarry Phone/Email as appropriate required Note: top of bunds is EL 52.0 m
3 IC Staff 6 hourly Notify of situation and EAP Status Email: Staff Event Notification #2
Stand Up: Levels Going Up
Calliope Monto Road likely to be flood Email / GAWB App / SMS Level > 41.5 mAHD IM Boyne Valley 24 hourly affected BV Event Notification #1
Email / GAWB App / SMS 1 IM Pikes Crossing (Group A) ONCE Evacuation of individual properties PC Event Warning #1
DS to North Coast Rail Email / GAWB App / SMS Level at 44.7 mAHD 2 IM ONCE Evacuation of individual properties (Group B) DS Event Warning #1
Email / GAWB App / SMS 3 IM Boyne Valley (Group C) ONCE Evacuation of individual properties BV Event Warning #1
Notify that intake tower will not be 1 IC Gladstone WTP ONCE Phone/Email as appropriate operational until safe to reinstate power Level at 45.0 mAHD and Stand Up HV substation not isolated Notify that power to intake of the pump 2 IM SunWater ONCE Email previously station has been flooded
3 IM LDMG ONCE Notify possible need for water restrictions Phone/Email as appropriate
DS to North Coast Rail Email / GAWB App / SMS Level at 46.9 mAHD IM ONCE Evacuation of individual properties (Group D) DS Event Warning #2
Email / GAWB App / SMS 1 IM Boyne Valley (Group E) ONCE Evacuation of individual properties BV Event Warning #2
Email / GAWB App / SMS Level at 47.8 mAHD DS to North Coast Rail DS Event Warning #3 2 IM ONCE Evacuation of individual properties (Group F)
Review Date – September 2020 81 Awoonga Dam Emergency Action Plan
Activation Notification Trigger Priority Notification To Frequency Purpose Method Level From
Stand Up: Levels Going Up (continued)
DS to North Coast Rail Email / GAWB App / SMS 1 IM ONCE Evacuation of individual properties (Group G) DS Event Warning #4 Level at 49.7 mAHD DS to North Coast Rail Email / GAWB App / SMS 2 IM ONCE Evacuation of individual properties (Group H) DS Event Warning #5
Phone / Direct Contact 1 IM LDMG ONCE Evacuation. Dambreak likely in < 4 hours Stand Up Email to confirm Email / GAWB App / SMS Level at 52.9 mAHD 2 IM Pikes Crossing (Group A) ONCE Evacuation. Dambreak likely in < 4 hours DF Event Warning #1
DS to North Coast Rail Email / GAWB App / SMS 3 IM ONCE Evacuation. Dambreak likely in < 4 hours (Groups B, D, F, G, H) DF Event Warning #1
Dam breach imminent IM SDCC ONCE Evacuation of impacted areas Emergency Alert Polygon
Stand Up: Levels Going Down
Calliope Monto Road likely to be flood Email / GAWB App / SMS Stand Up Level > 41.5 mAHD IM Boyne Valley 24 hourly affected BV Event Notification #1
Stand Down 1 IM LDMG ONCE Notify of closure of the event Email Spilling Event Communications Sheet
2 IC Staff ONCE Notify of closure of the event Email: Staff Event Notification #3
Commencement of Stand 3 IM DNRME ONCE Notify of closure of the event Email Down 4 IC Taragoola Quarry ONCE Notify of closure of the event Phone/ Email
Stand Email / GAWB App / SMS 5 IM DS to North Coast Rail ONCE Notify of closure of the event Down GP Event Notification #2
Recreation Area re- Recreation Area Lease Email / GAWB App / SMS IC ONCE Notify of re-opening of Recreation Area opened Holders RA Event Notification #2
Level <40.3 mAHD and Notify of closure of the event. Alternative Email / GAWB App / SMS IM Pikes Crossing ONCE Pikes Crossing re-opened access to be closed in 24 hours PC Event Notification #7
Review Date – September 2020 82 Awoonga Dam Emergency Action Plan
Table 7.3 : Notification Table 2: Loss of Containment / Abnormal Instrument Readings
Activation Trigger Priority Notification Notification To Frequency Purpose Method Level From
1 IC LDMG ONCE Notify of situation and EAP Status Email Non-Flood Event Communications Sheet
Alert Alert commenced 2 IC Staff ONCE Notify of situation and EAP Status Email: Staff Event Notification #4
3 IC DDS DNRME ONCE Notify of situation and EAP Status Email
1 IM LDMG At least daily Notify of situation and EAP Status Email Non-Flood Event Communications Sheet Lean Lean Forward commenced 2 IC Staff ONCE Provide update of current situation Email: Staff Event Notification #4 Forward 3 IM DDS DNRME At least daily Notify of situation and EAP Status Email
At least 12 1 IM LDMG Notify of situation and EAP Status Email Non-Flood Event Communications Sheet hourly
Email / GAWB App / SMS 2 IM Pikes Crossing (Group A) ONCE Notification of situation DF Event Notification #1
Stand up commenced DS to North Coast Rail Email / GAWB App / SMS 3 IM ONCE Notification of situation (Groups B, D, F, G, H) DF Event Notification #1
4 IC Staff ONCE Notify of situation and EAP Status Email: Staff Event Notification #4
At least 12 Stand Up 5 IM DDS DNRME Notify of situation and EAP Status Email hourly
1 IM SDCC ONCE Evacuation of impact area Emergency Alert Polygon
Phone / Direct Contact 2 IM LDMG ONCE Evacuation of impact area Email to confirm
Dam breach anticipated Email / GAWB App / SMS 3 IM Pikes Crossing (Group A) ONCE Evacuation DF Event Warning #1
DS to North Coast Rail Email / GAWB App / SMS 4 IM ONCE Evacuation (Groups B, D, F, G, H) DF Event Warning #1
Review Date – September 2020 83 Awoonga Dam Emergency Action Plan
Activation Trigger Priority Notification Notification To Frequency Purpose Method Level From
Dam breach imminent. Order immediate evacuation of IM Emergency (000) ONCE Phone No prior warnings impact area
1 IM LDMG ONCE Issue update on situation Email Non-Flood Event Communications Sheet
2 IC Staff ONCE Issue update on situation Email: Staff Event Notification #4 Stand Stand Down commenced 3 IM DDS DNRME ONCE Update DDS on situation and status Email Down Pikes Crossing, Advise all involved that situation has Email / GAWB App / SMS 4 IM ONCE DS to North Coast Rail resolved DF Event Notification #2
Review Date – September 2020 84 Awoonga Dam Emergency Action Plan
Table 7.4 : Notification Table 3: Loss of Containment (Taragoola Bunds)
Activation Trigger Priority Notification Notification To Frequency Purpose Method Level From
1 IC LDMG ONCE Notify of situation and EAP Status Email Non-Flood Event Communications Sheet
Provide update on situation (e.g. 2 IC Taragoola Quarry As required remain on alert, repairs required or Phone/Email as appropriate Alert Alert commenced return to work is permitted)
3 IC Staff ONCE Notify of situation and EAP Status Email: Staff Event Notification #4
4 IC DDS DNRME ONCE Notify of situation and EAP Status Email
1 IM LDMG At least daily Notify of situation and EAP Status Email Non-Flood Event Communications Sheet
Lean 2 IM Taragoola Quarry As required Provide update on situation Phone/Email as appropriate Lean Forward commenced Forward 3 IC Staff ONCE Provide update of current situation Email: Staff Event Notification #4
4 IM DDS DNRME At least daily Notify of situation and EAP Status Email
At least 12 1 IM LDMG Notify of situation and EAP Status Email Non-Flood Event Communications Sheet hourly
2 IM Taragoola Quarry As required Provide update on situation Phone/Email as appropriate Stand up commenced 3 IC Staff ONCE Notify of situation and EAP Status Email: Staff Event Notification #4
Stand Up At least 12 4 IM DDS DNRME Notify of situation and EAP Status Email hourly
Taragoola embankment 1 IM Taragoola Quarry As required Evacuation of the quarry Phone/Other direct contact and abutments cannot be inspected OR bund failure 2 IM LDMG ONCE Notify of evacuation Email Non-Flood Event Communications Sheet expected.
1 IM LDMG ONCE Issue update on situation Email Non-Flood Event Communications Sheet
Stand 2 IC Staff ONCE Issue update on situation Email: Staff Event Notification #4 Stand Down commenced Down 3 IM DDS DNRME ONCE Update DDS on situation and status Email
4 IM Taragoola Quarry As required Advise that situation has resolved Phone/ Email
Review Date – September 2020 85 Awoonga Dam Emergency Action Plan
Table 7.5 : Notification Table 4: Earthquake / Structural Damage
Activation Trigger Priority Notification Notification To Frequency Purpose Method Level From
1 IC LDMG ONCE Notify of situation and EAP Status Email Non-Flood Event Communications Sheet
Provide update on situation (e.g. 2 IC Taragoola Quarry As required remain on alert, repairs required or Phone/Email as appropriate Alert Alert commenced return to work is permitted)
3 IC Staff ONCE Notify of situation and EAP Status Email: Staff Event Notification #4
4 IC DDS DNRME ONCE Notify of situation and EAP Status Email
1 IM LDMG At least daily Notify of situation and EAP Status Email Non-Flood Event Communications Sheet
Lean 2 IC Taragoola Quarry As required Provide update on situation Phone/Email as appropriate Lean Forward commenced Forward 3 IC Staff ONCE Provide update of current situation Email: Staff Event Notification #4
4 IM DDS DNRME At least daily Notify of situation and EAP Status Email
At least 12 1 IM LDMG Notify of situation and EAP Status Email Non-Flood Event Communications Sheet hourly
2 IC Taragoola Quarry As required Provide update on situation Phone/Email as appropriate
Email / GAWB App / SMS 3 IM Pikes Crossing (Group A) ONCE Notification of situation DF Event Notification #1 Stand up commenced DS to North Coast Rail Email / GAWB App / SMS 4 IM ONCE Notification of situation (Groups B, D, F, G, H) Stand Up DF Event Notification #1 5 IC Staff ONCE Notify of situation and EAP Status Email: Staff Event Notification #4
At least 12 6 IM DDS DNRME Notify of situation and EAP Status. Email hourly
Taragoola embankment 1 IC Taragoola Quarry As required Evacuation of the quarry Phone and abutments cannot be Phone / Direct Contact inspected OR bund failure 2 IM LDMG ONCE Notify of evacuation. expected. Email to confirm
Review Date – September 2020 86 Awoonga Dam Emergency Action Plan
Activation Trigger Priority Notification Notification To Frequency Purpose Method Level From
Stand Up (continued)
1 IM SDCC ONCE Evacuation of impact area Emergency Alert Polygon
Phone / Direct Contact 2 IM LDMG ONCE Evacuation of impact area Email to confirm
Dam breach anticipated Email / GAWB App / SMS 3 IM Pikes Crossing (Group A) ONCE Evacuation Stand Up DF Event Warning #1
DS to North Coast Rail Email / GAWB App / SMS 4 IM ONCE Evacuation (Groups B, D, F, G, H) DF Event Warning #1
Dam breach imminent. Order immediate evacuation of IM Emergency (000) ONCE Phone No prior warnings impact area
1 IM LDMG ONCE Issue update on situation Email Non-Flood Event Communications Sheet
2 IM Staff ONCE Issue update on situation Email: Staff Event Notification #4
Stand 3 IC DDS DNRME ONCE Update DDS on situation and status Email Stand Down commenced Down 4 IM Taragoola Quarry As required Advise that situation has resolved Phone/ Email
Pikes Crossing, Advise all involved that situation has Email / GAWB App / SMS 5 IM ONCE DS to North Coast Rail resolved DF Event Notification #2
Review Date – September 2020 87 Awoonga Dam Emergency Action Plan
Table 7.6 : Notification Table 5: Terrorism
Activation Trigger Priority Notification Notification To Frequency Purpose Method Level From
On receipt of threat and if Notify of observed or received threat 1 IM National Security Hotline Phone anything or change to threat changes
On receipt of Threat received or QPS Counter Terrorism threat and if Notify Police of observed or received 2 IM Phone observed Liaison Officer anything threat or change to threat changes Lean On receipt of Forward threat and if Notify Police of observed or received 3 IM Emergency (000) Phone anything threat or change to threat changes
1 IM LDMG At least daily Notify of situation and EAP Status Email Non-Flood Event Communications Sheet
Lean Forward Stage 2 IC Taragoola Quarry As required Provide update on situation Phone/ Email commenced 3 IC Staff ONCE Provide update of current situation Email: Staff Event Notification #4
4 IM DDS DNRME At least daily Notify of situation and EAP Status Email
If situation Notify of observed or received threat 1 IM National Security Hotline Phone changes or change to threat
QPS Counter Terrorism If situation Notify Police of observed or received Stand Up Notify of changed threat 2 IM Phone Liaison Officer changes threat or change to threat
If situation Notify Police of observed or received 3 IM Emergency (000) Phone changes threat or change to threat
Review Date – September 2020 88 Awoonga Dam Emergency Action Plan
Activation Trigger Priority Notification Notification To Frequency Purpose Method Level From
Stand Up (continued)
At least 12 1 IM LDMG Notify of situation and EAP Status Email Non-Flood Event Communications Sheet hourly
Provide update on situation (e.g. 2 IC Taragoola Quarry As required remain on alert, repairs required, Phone/ Email stop work)
Email / GAWB App / SMS Stand up Stage 3 IM Pikes Crossing (Group A) ONCE Notification of situation commenced DF Event Notification #1 DS to North Coast Rail Email / GAWB App / SMS 4 IM ONCE Notification of situation (Groups B, D, F, G, H) DF Event Notification #1
5 IC Staff ONCE Notify of situation and EAP Status Email: Staff Event Notification #4
At least 12 6 IM DDS DNRME Notify of situation and EAP Status Email hourly
Stand Up Taragoola embankment 1 IM Taragoola Quarry As required Evacuation of the quarry Phone and abutments cannot be Phone / Direct Contact inspected OR bund failure 2 IM LDMG ONCE Notify of evacuation expected. Email to confirm
1 IM SDCC ONCE Evacuation of impact area Emergency Alert Polygon
Phone / Direct Contact 2 IM LDMG ONCE Evacuation of impact area Email to confirm
Dam breach anticipated Email / GAWB App / SMS 3 IM Pikes Crossing (Group A) ONCE Evacuation DF Event Warning #1
DS to North Coast Rail Email / GAWB App / SMS 4 IM ONCE Evacuation (Groups B, D, F, G, H) DF Event Warning #1
Dam breach imminent. Order immediate evacuation of IM Emergency (000) ONCE Phone No prior warnings impact area
Review Date – September 2020 89 Awoonga Dam Emergency Action Plan
Activation Trigger Priority Notification Notification To Frequency Purpose Method Level From
1 IM LDMG ONCE Issue update on situation Email Non-Flood Event Communications Sheet
2 IC Staff ONCE Issue update on situation Email: Staff Event Notification #4
Stand 3 IM DDS DNRME ONCE Update DDS on situation and status Email Stand Down commenced Down 4 IC Taragoola Quarry As required Advise that situation has resolved. Phone/ Email
Pikes Crossing, Advise all involved that situation has Email / GAWB App / SMS 5 IM ONCE DS to North Coast Rail resolved DF Event Notification #2
Review Date – September 2020 90 Awoonga Dam Emergency Action Plan
Appendix A. Nominated and Delegated Officers
Table A.1 : Nominated Responsible Officers and Delegates
Role Nominated Officers Delegated Officers Notes
Incident Manager General Manager - Network Water Quality Specialist Can be delegated at any time. General Manager - Capital The same person should not undertake both the Incident Manager and Incident Coordinator Roles.
Incident Coordinator Water Quality Specialist Maintenance Manager Can be delegated at any time. Other staff on Incident Management Team as nominated by General Manager - Network
Dam Site Inspector Operational Asset and Dam Safety Grounds and Catchment Role can be delegated with Supervisor Supervisor Incident Coordinator consent. Fitters In a flood situation, access to the Water Treatment Manager dam may be restricted. This position may need to be fulfilled by Contractor & Security Supervisor other GAWB personnel who reside at Awoonga.
Dam Safety Non – GAWB person engaged or Must be suitably experienced and Consultant seconded to provide advice RPEQ qualified engineer
Flood Engineer 1 Civil Engineer – Dam Safety Graduate Engineer - Civil Civil Engineer
Flood Engineer 2 External Consultant (Offsite)
Table A.2 : Contact Details for Trained Nominated Officers and Delegates
GAWB Role Name Phone Incident Management Team Roles (trained for)
General Manager – Network Incident Manager
Incident Manager Water Quality Specialist Incident Coordinator
General Manager - Capital Incident Manager
Network Owner Incident Coordinator
Operational Asset and Dam Safety Supervisor Dam Site Inspector
Grounds and Catchment Supervisor Dam Site Inspector
Water Treatment Manager Dam Site Inspector
Contractor & Security Supervisor Dam Site Inspector
Civil Engineer – Dam Safety Flood Engineer
Graduate Engineer - Civil Flood Engineer
Review Date – September 2020 91 Awoonga Dam Emergency Action Plan
Appendix B. Emergency Communication Plan
(refer to the Emergency Communication Plan and Contact Lists located in GAWB Controlled Documents)
Review Date – September 2020 92
Gladstone Area Water Board
Emergency Communications Plan MPL-EXT-0026 Controlled Document
AUTHORISED BY: General Manager - Network DATE OF ISSUE: September 2020 MAINTAINED BY: Team Coordinator - Network CURRENT VERSION: Version 10 - Issue 10 REVIEW DATE: 12 months from ‘Date of Issue’ DOCUMENT TYPE Management Plan
Gladstone Area Water Board 136 Goondoon Street Phone: (07) 4976 3000 Gladstone Q 4680 Fax: (07) 4972 5632 www.gawb.qld.gov.au
Gladstone Area Water Board This document is and shall remain the property of Gladstone Area Water Board. The document may only be used for the purpose for which it was commissioned and in accordance with the Conditions of Appointment. Unauthorised use of this document in any form whatsoever is prohibited. MPL-INT- | Emergency Communications Plan Commercial in Confidence
Contents Controlled Copy Distribution ...... 1 Document Control Sheet ...... 1 Objectives ...... 4 Key Emergency Communications Staff...... 4 Communication Plan - Awoonga Dam Emergency Action Plan (EAP) ...... 5 Standard Email Templates ...... 1 Pre-Season Notifications...... 2 EAP Notification Tables Standard Email, SMS and GAWB App Messages ...... 5 General Public Notifications ...... 5 Dam Failure Notifications ...... 5 Pikes Crossing Properties ...... 7 Downstream to North Coast Rail Properties ...... 9 Boyne Valley Residents/ Agistees ...... 11 Recreation Area Lease Holders ...... 11 Other Notifications ...... 12 Communication Plan – Cyclone Action Plan (Staff) ...... 14 Cyclone Action Plan Email Message Templates ...... 14 Standard Staff Email Messages Action Plan 2 – (Cyclone Watch) ...... 14 Standard Staff Email Messages Action Plan 3 (Cyclone Warning)...... 15 Action Plan 4 Strike Imminent ...... 16 Action Plan 5 Clean Up ...... 16 Cyclone Action Plan Staff SMS Messages ...... 17 Action Plan 2 – Cyclone Warning Issued by BOM ...... 17 Action Plan 3 – Cyclone Warning Issued by BOM ...... 17 Action Plan 4 – Evacuation Issued ...... 17 Action Plan 5 – Clean Up ...... 17 Incident Control Team SMS Messages (All Cyclone Plan Recipients) ...... 17 Action Plan 2 ...... 17 Action Plan 3 ...... 17 Cyclone Action Plan Media Contacts and Message Information ...... 18 Action Plan 3 ...... 18
MPL-INT- | Emergency Communications Plan Commercial in Confidence
Official Statements (Media, website, social media) ...... 19 Radio Communications ...... 20 Emergency Communications Plan Appendix A - Downstream and Upstream Notification Maps ...... 1 Emergency Communications Plan Appendix B – Emergency Contacts List and Stakeholder Groups ...... 1 Emergency Communications Plan Appendix C – SDCC Emergency Alert Template and Procedures ...... 14 Emergency Communications Plan Appendix D - SMS Delivery System Procedure ...... 19 Emergency Communications Plan Appendix E - GAWB App (Skoolbag) Admin Console ...... 24 Emergency Communications Plan Appendix F – Website Update Procedure ...... 29 Emergency Communications Plan Appendix G – Industrial Contacts List ...... 29
MPL-INT- | Emergency Communications Plan Commercial in Confidence
Controlled Copy Distribution The following positions have been issued with a controlled copy of the Communications Plan:
Copy Position Name Location No.
Document Control Sheet
Revision Status
Revision No. Revision Description Revision Date
8 Review and changes to the EAP June 2018
9 Review and changes to the EMP August 2019
10 Changes to align with restructure June 2020
Authorisation This document (Revision 10) was reviewed and accepted by the members of the Incident Control Team. Endorsed:
……………………………………………… / / General Manager - Network
Approved:
……………………………………………… / / Chief Executive Officer Page 1 of 62
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Glossary of Key Terms/Abbreviations
Definition Meaning
activation level The ERP follows four activation levels based on the scale and urgency of the event. These are: • Alert – a heightened level of vigilance and preparedness to the possibility of an event • Lean Forward – operational state prior to ‘stand up’ • Stand Up – operational state following ‘lean forward’ • Stand Down – transition from responding to an event back to normal core business
dam hazard For a dam, a reasonably foreseeable situation or condition that may: a) cause or contribute to the failure of the dam, if the failure may cause harm to persons or property; or b) require an automatic or controlled release of water from the dam, if the release of the water may cause harm to persons or property.
dam hazard event For a dam, an event arising from a dam hazard if: a) persons or property may be harmed because of the event; and b) a coordinated response involving 2 or more relevant entities is unlikely to be required to respond to the event; and c) the event is not an emergency event.
District disaster A group established under the Disaster Management Act 2003, either local or district, where the management area covered by the group may be affected by a dam hazard. group
disaster A plan developed under the Disaster Management Act 2003, by a local or district disaster management plan management group.
emergency event For a dam, an event arising from a dam hazard if: a) persons or property may be harmed because of the event; and b) any of the following apply— i. a coordinated response involving 2 or more of the relevant entities mentioned in paragraphs (b) to (d) of the definition relevant entity is likely to be required to respond to the event; ii. the event may arise because of a disaster situation declared under the Disaster Management Act; iii. an entity performing functions under the State disaster management plan may, under that plan, require the owner of the dam to give the entity information about the event.
Local Disaster Local governments are primarily Management Group
Pikes Crossing Residents that reside upstream of Pikes Crossing Bridge, Pikes Crossing Road, Benaraby (PC)
Downstream to Residents that reside downstream of Pikes Crossing Bridge, with their properties being adjacent North Coast Rail to the Boyne River Properties (DS)
Evacuation The action of evacuating a person or a place
Warning A statement or event that warns of something or that serves as a cautionary example
Notification The act of notifying someone or something
GP General Public
DF Dam Failure
BV Boyne Valley
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Definition Meaning
RA Recreational Area
EAP Emergency Action Plan
AWD Awoonga Dam
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Introduction This communication plan outlines how the Gladstone Area Water Board (GAWB) Incident Control Team members will communicate to staff, members of the public and associated assembled disaster management teams during a number of different scenarios. These will include: 1. Spilling event at Awoonga Dam 2. Cyclonic Weather for the Gladstone region 3. Bushfires on and around GAWB land 4. Blue Green Algae (BGA) Notification This communication plan is part of the suite of plans under GAWB’s Disaster Management plan and is to be used in conjunction with the following plans; 1. Awoonga Dam - Emergency Action Plan 2. Cyclone Action Plan 3. Fire Management Plan 4. Security Risk Management Plan 5. AD SOP 034 Minor Flood Actions 6. Industrial Customers Contact List This plan also contains the specific contacts information for all of the abovementioned plans and the specific communications templates to enable clear concise and accurate communication at all times to the required people. The various forms of communication used within this plan are: • Email • Phone Standard Messaging Service (SMS) • GAWB App • Radio both commercial and via GAWB’s network • Social Media
Objectives • Support the Incident Management Team to prepare for and respond to emergency situations • Ensure communications are clear, timely and efficient • Outline communications roles and responsibilities in the event of an emergency
Key Emergency Communications Staff Name Position Mobile Email
1 Stakeholder Relations and Communications Advisor
2 Team Coordinator
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Communication Plan - Awoonga Dam Emergency Action Plan (EAP) In accordance with Section 6 Communications of the EAP, GAWB is required to provide advice to affected members of the public when the EAP is activated. Public notifications throughout activation of the EAP include: • Persons immediately downstream of the dam including: o Pikes Crossing Properties o Downstream to North Coast Rail Properties • Boyne Valley residents and persons affected by access to Gladstone-Monto Road, including GAWB Land Agistees • Recreation Area Lease Holders It is noted that GAWB provides notifications to the Local Disaster Management Group (LDMG) who are responsible for providing notifications and warnings to affected properties downstream of the North Coast Rail line. The triggers, frequency and priority of notifications and warnings are outlined in Section 7 of the EAP. The ECP identifies the procedures to send notifications and warnings, the standard messages to be used and the contact details of the affected parties. Notifications to the public will include standard email and email to text as per the templates contained within this document. Prior to activation of the EAP, initial notifications are provided to the Pikes Crossing Properties according to SOP 034. Table 1 provides a summary of each effected areas, stakeholder groups and properties (map/table Table 2 provides an overview of the notifications and warnings to be provided to each group. (notifications include: pre-season notifications, flood event notifications and warnings and dam failure warnings). In the event that the dam fails or dam breach is anticipated, the Emergency Alert Polygon will be activated. (Refer to Appendix C for further information)
Table 1: Effected Areas , Stakeholder Groups and Properties
Effected Areas Stakeholder Groups Properties (Map/Table ID)
Pikes Crossing A 001, 016, 014, 015, 013, 011, 039, 005, 257, 258, 232 B 254 Downstream to North D 003, 006, 009, 010, 008 and 012 Coast Rail F 017, 036, 025, and 024 G and H 255, 259, 260, 256, 251, 252, 253, 038 C 261 Boyne Valley E 262
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Table 2: Overview of Notification and Flood Level Triggers
Notification No Alert Level Brief Description Notification Flood Level Trigger Location Medium General Public Notifications
Advising all stakeholders of the All Effected Properties Pre-Season Notification Email N/A season forecast.
Advising all stakeholders that an Email Event Notification 1 Pre-Alert event is imminent – brief GAWB App 40.3mAHD description of situation SMS Downstream to North Coast Rail, Recreation Area Lease Holders Email Advising all stakeholders that Event Notification 2 Stand Down GAWB App the event has closed/finished. 40.3mAHD SMS
Dam Failure Stand Up Pikes Crossing Dam failure not Emergency event at AWD is Downstream to North Coast Rail Event Notification 1 SMS N/A currently expected/ occurring. in progress All landlines and mobiles within the Stand down Emergency event at AWD is no SDCC EA Emergency Alert Polygon. Event Notification 2 Emergency event N/A longer occurring SMS Pikes Crossing no longer occurring Downstream to North Coast Rail. Stand Up All landlines and mobiles within the Dam failure SDCC EA Emergency Alert Polygon. Event Warning 1 Failure anticipated. Evacuate. N/A expected/ in SMS Pikes Crossing progress Downstream to North Coast Rail.
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Notification No Alert Level Brief Description Notification Flood Level Trigger Stakeholders Medium Location - Pikes Crossing
Updating contacts list, advising Pikes Crossing - Pre-Season Formal letter Pikes Crossing residents of the NA Notification and Email season forecast. A rain fall event is occurring that may cause AWD levels to rise Email Pikes Crossing - Event Notification Dam level at time of Pre-Alert above 40.3mAHD. Spillway flows GAWB App 1 event are likely to increase, which will SMS result in closure of Pikes Crossing. Pikes Crossing expected to be Email Pikes Crossing - Event Notification Prediction > Alert (rising) inundated. Alternate access via GAWB App 2 40.3mAHD AWD has been opened. SMS The forecast rainfall results in dam Email Pikes Crossing - Event Notification Lean Forward level predictions exceeding safe Prediction GAWB App 3 (rising) levels for the alternate access at >42.5mAHD SMS 42.5mAHD. Confirmation of 42.5mAHD being Email Pikes Crossing - Group A Pikes Crossing - Event Notification Lean Forward reached and alternate access GAWB App 42.5mAHD 4 (rising) closed. SMS Confirmation of alternate access via Email Pikes Crossing - Event Notification Lean Forward Awoonga Dam being re-opened, GAWB App 42.5mAHD 5 (receding) levels below 42.5mAHD. SMS Email Pikes Crossing - Event Notification Lean Forward / Levels receding. GAWB will advise Dam level at time of GAWB App 6 Alert (receding) when Pikes Crossing reopened. event SMS Confirmation of reopening of Pikes Email Pikes Crossing - Event Notification Stand Down Crossing. Advice of alternate route GAWB App 40.3mAHD 7 (receding) closure. SMS Confirmation of 47.9mAHD being Email Stand Up reached and evacuation may be Event Warning 1 GAWB App 47.9mAHD (Evacuation) required. Suggest planning SMS evacuation to higher ground
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Notification No Alert Level Brief Description Notification Flood Level Stakeholders Medium Trigger Downstream to North Coast Rail Notifications
Email Stand Up Immediate evacuation Downstream Event Warning 1 GAWB App 44.7mAHD Downstream to North Coast Rail - Group B (Evacuation) recommended. SMS Downstream Event Warning 2 Downstream to North Coast Rail - Group D Email Downstream Event Warning 3 Stand Up Immediate evacuation Downstream to North Coast Rail - Group G GAWB App 47.9mAHD (Evacuation) recommended. Downstream Event Warning 4 SMS Downstream to North Coast Rail - Group H Downstream Event Warning 5 Downstream to North Coast Rail - Group F Boyne Valley/Agistees Lease Holders Updating contacts list, advising Boyne Valley - Pre-Season Boyne Valley residents of the Email N/A Notification season forecast. Current rainfall results in levels Email Boyne Valley - Event Notification 1 Alert (rising) expected to reach 41.5mAHD 41.5mAHD Boyne Valley Group C, E and Agistees GAWB App causing closure of Monto Road. Awoonga Dam level has fallen to Stand down Email Boyne Valley - Event Notification 2 41.5mAHD. The Monto Road is no 41.5mAHD (receding) GAWB App longer inundated by lake levels. Lean Forward Boyne Valley - Event Notification 3 (rising) and Stand Awoonga Dam is now closed Email 42.5mAHD Recreational Lease Holders down (receding) Stand Up Immediate evacuation Email 44.7mAHD Boyne Valley - Event Warning 1 Boyne Valley Group C, E and Agistees (Evacuation) recommended GAWB App 47.9mAHD Recreation Area Lease Holders Awoonga Dam will close at Recreational Area - Event Lean Forward 42.5mAHD. Awoonga Dam is now Email 42.5mAHD Recreation Area Lease Holders Notification 1 (rising) closed. Recreational Area - Event Stand down Awoonga Dam is now open/closed Email Dam level at time Recreation Area Lease Holders Notification 2 (receding)
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Notification No Alert Level Brief Description Notification Flood Level Location Medium Trigger Taragoola Quarry Manager or Security at Taragoola Query Phone/ email as Gladstone Water Treatment Plant Verbal notifications and discussions GWTP – Duty Operator required SunWater SunWater Contact (Callide Pipeline Operator) General public using camping facilities – Boynedale Bush Camp In person 41.5mAHD Boynedale Bush Camp
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Standard Email Templates All templates associated with the notifications listed in the tables above are available via outlook. To use an email message template, do the following: 1. On the Home tab, in the New group, click New Items, point to More Items, and then Choose Form. 2. In the Choose Form dialog box, in Look In, click User Templates in File System. 3. The default templates folder is opened. The folder location is as follows: Windows 8, Windows 7, and Windows Vista c:\users\username\appdata\roaming\microsoft\templates 4. If your template is saved in a different folder, click Browse, and then select the template. 5. Select the template, and then click Open.
At the beginning of any event a “sharepoint group” will be created for the purposes of capturing all event information and communications.
All members of the Incident Management Team will be made members of this group. Please ensure that all emails are sent via this communication method, ensuring that all members are kept updated and will assist with team communication and records management.
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Pre-Season Notifications Three pre-season notifications will be sent out notifying residents of the approaching wet season. • Notification One (1): is sent to residents in the affected areas of Downstream to North Coast Rail Line area, Agistees and Recreation Area Lease holders. • Notification Two (2): is sent to residents in the affected Pikes Crossing area. • Notification Three (3): is sent to residents in the affected Boyne Valley area. These notifications will advise them of the general outlook for the season in accordance with the forecast issued by the Bureau of Meteorology (BoM) and to make any necessary preparations. The residents at this time will be requested to review and advise any changes to names, contact details and vehicle registrations of permanent residents at the address in GAWB’s register. General Public Email Template: Downstream to North Coast Rail Properties & Recreation Area Lease Holders Dear Residents With the level of Lake Awoonga currently at [current lake level] (maximum height is 40m) we would like to inform residents that with the upcoming wet season/potential cyclone season there is a possibility for the lake to spill should there be enough rainfall to result in inflows and increase the current level. This is a courtesy email for information only and as part of GAWB preparedness for any spilling event that may occur as a result of rainfall in the upcoming wet season. We will communicate the levels of the lake as they increase in accordance with the emergency action plan and communication plans and advise all residents of the appropriate trigger points for inundation. We will continue to monitor the inflow and effect on lake levels as well as reviewing the weather forecasts for rainfall in the region and advise residents as necessary. “Remember staying safe this flood season is your responsibility.” For practical tips and general information for flood season preparation go to the Gladstone Regional Council Website – Emergencies and Disasters tab. If you have changed any contact details in the past year can you, please advise in writing via email to [email protected] , so that our records can be updated. Regards
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Pikes Crossing Email Template Pikes Crossing Properties Dear Residents With the level of Lake Awoonga currently at [current lake level] (maximum height is 40m) we would like to inform residents that with the upcoming wet season/potential cyclone season there is a possibility for the lake to spill should there be enough rainfall to result in inflows and increase the current level. We note that the levels that will affect you as residents of the Pikes Crossing area will be 40.3mAHD (at which time the alternate access arrangements via the dam spillway area will be activated) and then 42.5mAHD at which time the alternate access would then be closed. This is a courtesy email for information only and as part of GAWB preparedness for any spilling event that may occur as a result of rainfall in the upcoming wet season. As per the usual arrangements that have been agreed between GAWB and the Pikes Crossing residents, we will communicate the levels of the lake as they increase in accordance with the emergency action plan and communication plans and advise all residents of the appropriate trigger points for inundation of Pikes Crossing, commencement of alternate access points and if necessary the closure of the alternate access points. We will continue to monitor the inflow and effect on lake levels as well as reviewing the weather forecasts for rainfall in the region and advise residents as necessary. If you have changed any contact details in the past year can you, please advise in writing via email to [email protected], so that our records can be updated. We also remind you to download the GAWB App to your smartphone or other device and sign up to the Pikes Crossing Alerts. Simply go to the App Store on your Apple device or Google Play Apps on your android device and search “GAWB”. Please ensure you enable push notifications. Once you have downloaded the App, use the below details to access alerts specific to Pikes Crossing Residents.
“Remember staying safe this flood season is your responsibility.” For practical tips and general information for flood season preparation go to the Gladstone Regional Council Website – Emergencies and Disasters tab. We would like to take this opportunity to wish you all best for the festive season and hope you have a prosperous new year. Regards
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Boyne Valley Email Template Boyne Valley Properties & Agistees Dear Residents With the level of Lake Awoonga currently at [current lake level] (maximum height is 40m) we would like to inform residents/agistee’s that with the upcoming wet season/potential cyclone season there is a possibility for the lake to spill should there be enough rainfall to result in inflows and increase the current level. We note that the levels that will affect you as residents/agistees of the Boyne Valley area will be 41.5mAHD (at which time your access to/from Gladstone area will be closed) due to inundation of Monto Road as a result of water levels behind the dam wall/local flooding. This is a courtesy email for information only and as part of GAWB preparedness for any spilling event that may occur as a result of rainfall in the upcoming wet season. We will communicate the levels of the lake as they increase in accordance with the emergency action plan and communication plans. We will continue to monitor the inflow and effect on lake levels as well as reviewing the weather forecasts for rainfall in the region and advise residents as necessary. If you have changed any contact details in the past year can you, please advise in writing via email to [email protected], so that our records can be updated. We also remind you to download the GAWB App to your smartphone or other device and sign up to the Boyne Valley Crossing Alerts. Simply go to the App Store on your Apple device or Google Play Apps on your android device and search “GAWB”. Please ensure you enable push notifications. Once you have downloaded the App, use the below details to access alerts specific to Boyne Valley Residents.
“Remember staying safe this flood season is your responsibility.” For practical tips and general information for flood season preparation go to the Gladstone Regional Council Website – Emergencies and Disasters tab. We would like to take this opportunity to wish you all best for the festive season and hope you have a prosperous new year. Regards
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EAP Notification Tables Standard Email, SMS and GAWB App Messages Note: the below messages are linked to EAP Notification Tables however may not necessarily be required to be sent upon activation of this plan.
General Public Notifications Event Notification 1 – Alert (rising) (DS, BV, RA) Email and GAWB App A rainfall event is occurring that may cause Awoonga Dam levels to rise, above 40.3m. Spillway flows are likely to increase, which may result in flooding. GAWB will continue to monitor the situation and keep you updated. SMS Notification Awoonga Dam levels are predicted to rise above 40.3m. GAWB will notify you as the situation changes. GP Event Notification 2 – EAP Stand down (receding) (DS, RA) Email and GAWB App Lake Awoonga is currently at [insert lake level] and falling. With the current conditions and weather forecasts the dam is expected to remain below 40.3m. GAWB would like to thank you for your cooperation during this event. SMS Notification Lake Awoonga has receded below 40.3m and the event is no longer occurring.
Dam Failure Notifications Event Notification 1 – Stand Up (dam failure NOT expected/in progress) (Groups - A, B, D, F, G and H) Email and GAWB App An emergency event is occurring at Awoonga Dam which may result in flooding. GAWB will continue to monitor the situation and keep you updated SMS Notification An emergency event is occurring at Awoonga Dam. GAWB will continue to monitor the situation and keep you updated. Event Notification 2 – EAP Stand down (dam failure – no longer occurring) (Groups - A, B, D, F G and H) Email and GAWB App Emergency event at Awoonga Dam is no longer occurring. GAWB would like to thank you for your cooperation during this event.
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SMS Notification Lake Awoonga emergency event is no longer occurring. GAWB thanks you for your cooperation during this event. Event Warning 1 – Stand Up (dam failure expected/in progress) (Groups - A, B, D, F, G and H) Email and GAWB App Emergency. Emergency. AWOONGA Dam is expected to fail. Dam failure will result in dangerous downstream flooding in low lying areas near the Boyne River including BENARABY, BOYNE ISLAND and TANNUM SANDS. Residents need to act to protect life and move to high ground immediately. Do not delay. Follow any Queensland Police Service evacuation advice. SMS Notification Awoonga Dam is expected to fail. Take action to protect life and move to high ground immediately. Follow any QPS evacuation advice. Info on ABC radio.
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Pikes Crossing Properties Levels Rising Event Notification 1 – Pre-Alert (Group A) Email and GAWB App Notification A rainfall event is occurring that may cause Awoonga Dam levels to rise above 40.3m. Spillway flows are likely to increase, which will result in the closure of Pikes Crossing. Ensure you have your swipe card available to utilise the alternative access via Awoonga Dam and we take this opportunity to remind you of the access rules. GAWB will notify you once the swipe cards have been activated. If you have any questions or concerns, please contact GAWB on 49763000. SMS Notification A rain fall event is occurring and Pikes Crossing may be inundated. Ensure your swipe cards are available. Event Notification 2 – Alert (rising) (Group A) Email and GAWB App Notification Pikes Crossing Residents The current Awoonga Dam level is [insert lake level] (at [time]) and rising. Pikes Crossing is expected to become inundated [time/day]. Access via alternative route through Awoonga Dam is now open and swipe cards have been activated. See attached route map. (Attached map ref: 161704) SMS Notification Current dam level [insert lake level]. Alternative access is now open. Swipe cards are activated. Event Notification 3 – Lean Forward (rising) (Group A) Email and GAWB App Notification Current dam level [insert lake level] at [time]. Based on the current conditions the dam is rising. Access via alternative route through Awoonga Dam may be closed when levels reach 42.5m based on the weather forecast. GAWB will continue to monitor the situation and keep you updated. You must now choose to leave your property or take preparations to stay. SMS Notification Current dam level [insert lake level]. Alternative access maybe closed once reaching 42.5m.
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Event Notification 4 – Lean Forward (rising) (Group A) Email and GAWB App Notification Current dam level [insert lake level] at [time]. Access via alternative route through Awoonga Dam is now closed to vehicular traffic. SMS Notification Current dam level [insert lake level]. Alternative access is now closed. Event Warning 1 – Stand Up – Evacuation (Group A) Email and GAWB App Notification GAWB recommends immediate evacuation via Pikes Crossing Road to higher ground on or adjacent to Lot 2 RP615470, 320 Pikes Crossing Road SMS Notification GAWB recommends immediate evacuation to Lot2 RP615470, 320 Pikes Crossing Road Levels Receding Event Notification 5 – Lean Forward (receding) (Group A) Email and GAWB App Notification Current dam level [insert lake level]. Based on the current conditions the dam is receding. Dam level is now less than 42.5m. GAWB has inspected the alternative access route and advise it is safe to use and has been re-opened. SMS Notification Current dam level [insert lake level]. The alternate access route has been re- opened. Event Notification 6 – Alert (receding) (Group A) Email and GAWB App Notification Current dam level [insert lake level]. Based on the current conditions the dam level is falling. GAWB will advised when Pikes Crossing is no longer inundated. SMS Notification Current dam level [insert lake level]. GAWB will advised when Pikes Crossing is no longer inundated.
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Event Notification 7 – Stand down (receding) (Group A) Email and GAWB App Notification The current dam level is now less than 40.3m and the Gladstone Regional Council/Police have advised that Pikes Crossing is now safe to use. GAWB wishes to advise that the alternate access via Awoonga Dam will be closed in 24 hours from this notification and swipe cards will be deactivated. Please ensure all vehicles are removed from the Awoonga Dam site as the gates will be locked. SMS Notification Current dam level [insert lake level]. Alternate access will be closed in 24hrs and swipe cards deactivated. Please remove all vehicles from dam site.
Downstream to North Coast Rail Properties Levels Rising Event Warning 1 – EAP Stand Up – Evacuation (Group B) Email and GAWB App Notification Current dam level [insert lake level]. GAWB recommends evacuation to higher ground on property or leave your property prior to access being cut by flooding SMS Notification Current dam level [insert lake level]. GAWB recommends evacuation before access is cut by flooding Event Warning 2 – EAP Stand Up – Evacuation (Group D) Email and GAWB App Notification Current dam level [insert lake level]. GAWB recommends immediate evacuation via Pikes Crossing Road to higher ground near intersection of Pikes Crossing and Awoonga Dam Road SMS Notification Current dam level [insert lake level]. GAWB recommends immediate evacuation to the intersection of Pikes Crossing and Awoonga Dam Road. Event Warning 3 – EAP Stand Up – Evacuation (Group G) Email and GAWB App Notification Current dam level [insert lake level]. GAWB recommends immediate evacuation via Awoonga Dam Road, to higher ground on adjacent properties on Awoonga Dam Road. SMS Notification
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Current dam level [insert lake level]. GAWB recommends immediate evacuation to on adjacent properties on Awoonga Dam Road.
Event Warning 4 – EAP Stand Up – Evacuation (Group H) Email and GAWB App Notification Current dam level [insert lake level]. GAWB recommends immediate evacuation to higher ground on adjoining property L2 RP612900, 721 Awoonga Dam Road. SMS Notification Current dam level [insert lake level]. GAWB recommends immediate evacuation to L2 RP612900, 721 Awoonga Dam Road. Event Warning 5 – EAP Stand Up – Evacuation (Group F) Email and GAWB App Notification Current dam level [insert lake level]. GAWB recommends immediate evacuation to higher ground on property SMS Notification Current dam level [insert lake level]. GAWB recommends immediate evacuation to property higher ground on property.
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Boyne Valley Residents/ Agistees Levels Rising Event Notification 1 – EAP Alert (rising) Email and GAWB App Notification Current dam level [insert lake level] and rising. The current weather forecast has these conditions continuing in which case it is expected that the Monto Road could be inundated by Lake Awoonga. Event Warning 1 – EAP Stand Up (Group C and E) Email and GAWB App Notification Current dam level [insert lake level]. GAWB recommends immediate evacuation to higher ground on property.
Levels Receding Event Notification 2 – EAP Stand down (receding) Email and GAWB App Notification Current dam level is [insert lake level] and falling. The Monto Road is no longer inundated by lake levels. Please check Gladstone Regional Councils website for current road conditions.
Recreation Area Lease Holders Levels Rising Event Notification 1 – EAP Lean Forward (rising) Email Notification To ensure public safety the Recreational Area will be closed when the dam reaches 42.5m. Current dam level is (level) and the Recreation Area is open/closed. Levels Receding Event Notification 2 – EAP Stand down (receding) Email Notification Current dam level is (level) and the Recreation Area is now open/closed.
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Other Notifications Local Disaster Management Group Standard Emails Refer to Awoonga Dam “Spilling” or “Non-Flood” Event Communication Sheet (Refer Awoonga Dam EAP Appendix E “Forms”)
EAP Incident Management Team Standard Text Messages Urgent Notice Awoonga Dam Event [situation level] has been activated. Current lake level at [insert lake level]. Please confirm receipt of message by email or SMS.
Staff Standard Email Messages Email Notification Message 1 (Pre-Alert) Good morning staff A rain fall event is occurring that may cause AWD levels to rise. Lake Awoonga is currently sitting at [insert lake level] and rising. Please take care and drive to conditions. Follow any instructions given to you by your Manager/Supervisor. The Incident Management Team will continue to monitor the situation and further updates will be provided as conditions change. Email Notification Message 2 (Alert/ Lean Forward/ Stand Up) Good morning Staff Lake Awoonga is currently at [insert dam level] and rising/falling. With the current conditions and weather forecasts the dam is expected to rise/recede below [insert lake level]. Please take care and drive to conditions. Follow any instructions given to you by your Manager/Supervisor. The Incident Management Team will continue to monitor the situation and further updates will be provided as conditions change. Email Notification Message 3 (Stand Down) Good morning staff Lake Awoonga is currently sitting at [insert lake level] and falling. The Incident Management Team will continue to monitor the situation and further updates will be provided if conditions change.
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Email Notification Message 4 (Non-Flood) Good morning staff The Awoonga Dam EAP has been activated due to a [Loss of Containment/ Taragoola Bund / Unusual Instrumentation / Earthquake / Structural Damage / Terrorism] incident. Activation level is currently [insert activation level] The Incident Management Team will continue to monitor the situation and further updates will be provided as conditions change.
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Communication Plan – Cyclone Action Plan (Staff) In accordance with GAWB’s Cyclone Management Plan there will be a requirement to communicate to GAWB staff and the Local Disaster Management Group various information around cyclone preparedness with regard to the various actions plans. GAWB staff will be advised via three possible means being email, GAWB App and email to text. Any communications will be as per the templates set out within this document and in accordance with the requirements of the individual action plans.
Cyclone Action Plan Email Message Templates
Standard Staff Email Messages Action Plan 2 – (Cyclone Watch) Initial Message to all staff. Cyclone threat advised and possible increase All Staff, GAWB has activated its Cyclone Action Plan based on advice provided by BoM. The methods of communicating updates to staff on the situation will be as follows; • Internal Email initially – until staff are required to stay home • SMS via the number provided to GAWB as an urgent contact • GAWB App General sources of information include: • The GAWB website • The local radio stations • The BoM website GAWB will provide information and updates on the situation on all of these types of media. It is the responsibility of all GAWB staff to ensure they monitor these media forms and take notice of the advice provided within them. Below is a brief description of what each Action Plan status means and how GAWB is preparing. A reminder to all, please monitor your phones, the BoM and GAWB website for any updates during this event. Action Plan 1: Pre–Season Preparation (September / October) . Works to be undertaken to prepare GAWB facilities and assets for the approaching cyclone season. Action Plan 2: Cyclone Watch Issued by BoM (Cyclone expected within 48 to 24 hours) . BoM have issued a Cyclone Watch for the Gladstone area . Weather conditions have led to the development of a cyclone or tropical low depression that may impact on the coast in the vicinity of Gladstone; . Cyclone may arrive in the region within 48 hours
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Action Plan 3: Cyclone Warning Issued by BoM (Cyclone Expected Within 24 Hours) . BoM have issued a Cyclone Warning for the Gladstone Area . A cyclone has fully developed and is expected to impact on the coast in the vicinity of Gladstone within 24 hours; . Increasing wind strengths are imminent . GAWB Offices and Workplaces closed, staff sent home.
Action Plan 4: Evacuation Warning Issued Cyclone (severe weather conditions) expected at any time; . Increasing wind strengths and heavy rain falling. . Cyclone has struck the coast in the vicinity of Gladstone; Action Plan 5: Cyclone Recovery Period Period immediately after the cyclone has passed and weather conditions have improved. Regards
Standard Staff Email Messages Action Plan 3 (Cyclone Warning) Threat Increasing All Staff GAWB’s Cyclone Management Plan status has been escalated and is currently at Action Plan 3 (Cyclone Watch issued for the Gladstone Region) based on the latest advice from BoM of the risk posed by Cyclone ______currently. At this time staff are asked to complete final preparations in their offices or workplace for an impending cyclone and then all staff, excluding those involved in the Incident Management Team, are requested to cease work and proceed to their homes for safety. We will continue to monitor the developing situation and will review this decision when the next advice is provided by the BoM at _____ on the cyclone’s movements. Staff are reminded that the Gladstone region is under cyclone watch and should take care when travelling. If we decide that the situation has altered, we will post this information on the GAWB website and contact staff via SMS messaging. Staff are encouraged to actively monitor both the BoM, GAWB websites and your mobile phones for any updates on the situation. ______Threat Reducing All Staff The latest advice received from the BoM is that Gladstone is still under cyclone warning and therefore GAWB remains at Action Plan 3. Although a cyclone remains in the area we are being advised that the threat is reducing.
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Further updates will be provided as required. ______
All Staff, Current advice provided by BoM has the Gladstone region under cyclone WATCH. This advice has enabled GAWB to reduce the cyclone status to Action Plan 2. We will continue to monitor the cyclone for any changes in path and will update people as required. For information Action Plan 2 still leaves GAWB in a state of readiness but it takes the Incident Response Team off standby and relaxes some of our controls around pumping and reservoir levels. The situation will continue to be monitored and updates will be delivered to all staff. ______All Staff, Based on the advice provided by BoM Gladstone is no longer under cyclone WATCH. The cyclone status is now to be downgraded to Action Plan 1. Note: Action Plan 1 is the pre-season clean up stage, make your areas tidy. ______
Action Plan 4 Strike Imminent All Staff GAWB is preparing to increase its status to Action Plan 4, staff evacuation and formation of the Incident Team. Staff are reminded that Gladstone is under threat of a Cyclone and should minimise any movement around the region. Any updates will be posted on the GAWB Website and sent via SMS to all staff. Please monitor the BoM site, GAWB website and your phones for any updates provided on the situation as it develops. ______
Action Plan 5 Clean Up All Staff GAWB is currently assessing the damage sustained to infrastructure and determining if areas are safe for work to resume. Please do not attend work until advised to do so. Information will be posted on the GAWB Website, sent via SMS and if required announced over the radio. Staff are requested to monitor these for any information updates. ______
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Cyclone Action Plan Staff SMS Messages
Action Plan 2 – Cyclone Warning Issued by BOM Staff advice - GAWB is at Action Plan 2, the Office is open and staff are requested to attend their next scheduled shift.
Action Plan 3 – Cyclone Warning Issued by BOM Staff advice - GAWB is at Action Plan 3, the Office is now closed. Staff are requested to remain at home and monitor all forms of communication. If the cyclone warning is lifted by BoM then staff are to return for their next rostered shift. ______Staff advice – GAWB advises that the Cyclone Warning has been lifted and staff are requested to return to work for their next rostered shift.
Action Plan 4 – Evacuation Issued Office Closed……. IMT assembled.
Action Plan 5 – Clean Up Staff advice – GAWB is currently assessing the damage sustained, staff will be advised when it is safe to return to work. Please do not attend until instructed to do so, please monitor all media forms and mobile phones for updates. Staff advice – GAWB Office and plants are open, all staff are requested to return to work on their next scheduled shift.
Incident Control Team SMS Messages (All Cyclone Plan Recipients)
Action Plan 2 GAWB has moved to Action Plan 2 – Watch Issued, please complete your required Action Plan 2 actions as per the Cyclone Management Plan. Please report receipt of this message to Infrastructure Planning Manager.
Action Plan 3 GAWB has moved to Action Plan 3 – Warning Issued, please complete your required Action Plan 3 actions as per the Cyclone Management Plan. Please report receipt of this message to Infrastructure Planning Manager.
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Cyclone Action Plan Media Contacts and Message Information Script to Respond to Public Enquiries during an event: “If you have an emergency please hang up and call 000. For information on Awoonga Dam including dam levels please refer to our website www.gawb.qld.gov.au For updates on the current disaster please contact the Local Disaster Coordinator Centre on (07) 4977 6655. Contact SES for flood, storm and cyclone damage on 132 500. Thank you, Gladstone Area Water Board”
Action Plan 3 Issue relevant radio advertisements to the local radio stations (below) for public notice. Contact details for each station are listed below. Suggested media is:
4CC (Gladstone) – Direct Line – 07 49700 300
4RO (Rockhampton) Direct Line – 07 49202 000
4CC/4RO – General Manager
Triple M – Rockhampton and HitFM – Gladstone – Direct Line – 07 4923 5300
ABC Radio – Direct Line – 07 49 245 111
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Official Statements (Media, website, social media)
In the event of an emergency, official statements (primarily media releases) will be approved by the Incident Controller. Media Spokespeople include the Incident Controller and the Chief Executive Officer only.
During an emergency, the GAWB website and Facebook page will act as vital tools in communicating information to the public. All information about an emergency event needs to be approved by the Incident Controller prior to publication, with the exception of Bureau of Meteorology (BoM) updates, pre-approved key messages and content taken directly from approved media releases.
Facebook Message Structure When a media release is posted on the website, take the most important paragraph and post to the Facebook page with a hyperlink to see the full release on the site.
BoM Updates Post BoM updates as they come to hand and link back to the BoM website.
Replying to Facebook Enquiries If resources are available all efforts should he made to reply to customers if possible. Tips to assist: 1. Approvals: Before posting anything on the Facebook page, ensure the information is correct, is in plain language and has been sourced from a trusted source or pre-approved key messages. 2. Get it out as soon as possible: As soon as you get approval, publish. 3. Simple language: Use plain English and write to about a grade 8 reading standard. Under stress, people need simple, clear information. 4. Trusted sources: Share information from trusted agencies including the Local Disaster Management Group, Queensland Fire and Emergency Services, Queensland Police, the Bureau of Meteorology and utility providers. 5. Inappropriate content: Any inappropriate content must be removed from the site as soon as discovered. 6. Times and dates: Add a time and date on every Facebook post during an emergency. 7. Keep checking posts: keep checking your Facebook posts, even the old ones, as people will continue to comment and ask questions. 8. Correct wrong information respectfully: quote the source of your information if possible.
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Radio Communications
Radio Communications will be determined by the Incident Controller at the time of the event. The following diagram is the hierarchy of communications.1 Incident Manager
Incident Controller
Hatchery Manager HR Manager
LWT Plant RGE Operator Superintendent M&E Maintenance Supervisor Superintendent
GAWB also has a 2-way radio located at 367 Pikes Crossing Road, Benaraby.
GAWB Network Radio Frequencies The GAWB frequencies are outlined the table below.
Hierarchy Base or Car mounted unit Hand Held Radios Dam Repeater GAWB NET 1 Channel 43 Lady Larcom GAWB NET 2 Channel 44 Repeater East End Repeater GAWB NET 3 Channel 45 Mt Zussino Repeater GAWB NET 4
1 Call signs and networks will be confirmed by the Incident Controller at the time of the event 20 | Page
Gladstone Area Water Board Emergency Communications Plan 2020
Emergency Communications Plan Appendix A - Downstream and Upstream Notification Maps
1 | PAGE N o r th C o a s DOWN STREAM t L PROPERTIES in e
LOCALITY PLAN
BOYNE RIVER
Legend
Bridge
Evacuation Point
Structure Pikes Crossing Notification Group & Flood Level A Level
Down Stream to North Coast Rail Notification Group & Flood Level B Level 44.7 m-AHD
D Level 46.9 m-AHD R F Level 47.8 m-AHD E IV G & H Level 49.7 m-AHD R E N Y Property Boundary O B Railway Line
EMERGENCY ACTION PLAN APPENDIX "A" EMERGENCY CONTACT LIST DOWN STREAM NOTIFICATION GROUPS LAKE 000-G-MAP-9090_3 26/06/2018 AWOONGA
© Copyright Gladstone Area Water Board (GAWB). This map/drawing is the property of GAWB and must not be copied or reproduced without the authority of GAWB. No liability will be accepted for any loss or damage which may arise from the use of or reliance upon this information.
R
E
V
I
R
E
N
Y
O B UP STREAM PROPERTIES
LOCATION MAP
Legend Property Boundary
Up Stream Notification Group & Flood Level C - Level 44.7
E - Level 47.8
Railway Line
EMERGENCY ACTION PLAN EMERGENCY CONTACT LIST UP STREAM NOTIFICATION GROUPS APPENDIX B
000-G-MAP-9161_1 26/06/2018
© Copyright Gladstone Area Water Board (GAWB). This map/drawing is the property of GAWB and must not be copied or reproduced without the authority of GAWB. No liability will be accepted for any loss or damage which may arise from the use of or reliance upon this information. Gladstone Area Water Board Emergency Communications Plan 2019
Appendix B has been redacted Emergency Communications Plan Appendix C – SDCC Emergency Alert Template and Procedures ECP C.1 Emergency Alert Activation Procedures
In the event that the dam fails or dam breach is anticipated within four hours, GAWB can activate the Emergency Alert Polygon lodged with the SDCC. This triggers an SMS / text to speech message to all landlines and mobiles located within the lodged impact area polygon. This polygon includes the areas downstream of the dam anticipated to be impacted for a dam failure during a PMF event.
The procedures, contact details and forms to activate the Emergency Alert are included in the ECP and reproduced here: 1) Incident Manager makes the decision to warn via Emergency Alert based on: a) Is there a potential for loss of life and/or a major threat to a significant number of properties or the environment? b) Is the community required to take action or is urgent action required due to the time of the situation i.e. in the night? c) Is there adequate time available to process and approve the use of an EA to disseminate the community warning message? 2) Contact SDCC Watch Desk on 07 3635 2387 or 0408 190 872 a) Provide your name and contact phone number. Request and record name of SDCC Watch Desk officer. b) Advise your intention to use the Emergency Alert system for an Awoonga Dam Emergency Event. c) Request SDCC Watch Desk to locate GAWB’s pre-loaded polygon PMFevent_GAWB_01.kml d) If required, request verbal activation of Emergency Alert. Otherwise, advise Request Form will be emailed 3) Email completed Emergency Alert Template Request Form to SDCC Watch Desk at: [email protected] a) Check Emergency Alert Template Request Form, and complete any remaining elements - Pre-populated Word Document is located at: ECM (Ref#6124685) https://gaw.t1cloud.com/T1Default/CiAnywhere/Web/GAW/RedirectToFunction?sk.Docu mentSetId=6124685&f=%24EMC.DOC.PROP.MNT&suite=ECM&h=uTsRBaK7nY&t=BE077 46 b) Emergency Alert Polygon in .kml format if required PMFevent_GAWB_01.kml is located within the GAWB GIS Mapping System c) Form must be sent from a GAWB email address by Incident Manager, or CEO. 4) Contact SDCC Watch Desk to confirm receipt of Request Form. Request an email confirmation once message is sent. 5) Be ready to complete the Incident Coordinator Checklist to confirm the Polygon Area and Message Playback with SDCC Watch Desk if requested.
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Gladstone Area Water Board Emergency Communications Plan 2019
6) Continue with other warning mechanisms (direct notification, LDMG notification) according to the Event Notification Table. NOTES: 1) The Emergency Alert system is a National System with alerts processed based on level of severity. Warning requirements in other jurisdictions could affect the timing and efficiency of warnings sent via the Emergency Alert System, particularly during extreme weather events. 2) Based on testing, timing of phone alerts will take at least 20 minutes from issue and SMS alerts 2 minutes. 3) Once the SDCC Emergency Alert has been activated, warnings via other methods should be implemented.
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Gladstone Area Water Board Emergency Communications Plan 2019
ECP C.2 Emergency Template Pre-populated Word Document is located at: ECM (Ref#6124685) https://gaw.t1cloud.com/T1Default/CiAnywhere/Web/GAW/RedirectToFunction?sk.DocumentSetId=6124685&f=%24EMC.DOC.PR OP.MNT&suite=ECM&h=uTsRBaK7nY&t=BE07746 EMERGENCY ALERT REQUEST FORM
c Date Time Incident/Event: Awoonga Dam Failure
Requesting Officer: Contact Details: (name, contact number and email address, position. Local Government)
Chief Engineer, Gladstone Area Water Board
PO Box 466, Gladstone QLD 4680 EMERGENCY ALERT REQUEST
March 2015 Prepared By: Position:
Event Type Cyclone Flash Flood Flood Storm Surge Tsunami* Bushfire Chemical Spill Fire Incident Smoke or Toxic Plume Other (please specify): *NB. Tsunami EA campaigns will be sent as Location Based Text Message ONLY
Message Severity Emergency Warning** Watch & Act Advice **N.B. activates the SEWS
Campaign Mode Voice SMS – Location Based SMS – Service Address Based
LDMG Advised? YES NO (as per the Awoonga Dam Emergency Action Plan) DDC Advised? YES NO
Threat Direction Required? YES NO Note: Can only be used for Emergency Warnings. Indicate direction on map
1. EA Polygon Area: Map attached
2. Spatial format: Use only these file extensions: Indicate the format used: For spatial data, is it supplied via ESRI *.dbf, *.prj, *.shp, *.shx DMportal - specify filenames GML *.gml, *.xsd below KML *.kml FTP - specify filenames below MapInfo TAB *.dat, *.id, *.map, *.tab Email MapInfo Mid/Mif *.MIDI Sequence, *.mif Filename: Other (please specify) PMFevent_GAWB_01
3. Handwrite (please use capitals for clarity) or Type Voice message (Ideally message should be less than 450 characters) Emergency. Emergency. A-WONGA Dam is expected to fail. Dam failure will result in dangerous downstream flooding in low lying areas near the Boyne River including BEN-AR- A-BE, BOYNE ISLAND and TANNUM SANDS. Residents need to act to protect life, and move to high ground immediately. Do not delay. Follow any Queensland Police Service evacuation advice.
4. Type or handwrite SMS below (maximum of 160 characters including spaces) Awoonga Dam is expected to fail. Take action to protect life and move to high ground immediately. Follow any QPS evacuation advice. Info on ABC radio.
For use by SDCC Authorising Officer Name: Manual Transmission: EMS Transmission: EA User Name: EMS Report ID: ______
EA Guidelines and the Emergency Alert Request Form Template are available at: www.disaster.qld.gov.au
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Gladstone Area Water Board Emergency Communications Plan 2019
ECP C.3 Emergency Alert Polygon PMFevent_GAWB_01.kml is located within the GAWB GIS Mapping System
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Gladstone Area Water Board Emergency Communications Plan 2019
ECP C.4 Emergency Alert Requestor Checklist
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Gladstone Area Water Board Emergency Communications Plan 2019
Emergency Communications Plan Appendix D - SMS Delivery System Procedure In order to send an SMS (text) to multiple recipients the following procedure must be followed. Log onto your normal desktop, click start then run Type mstsc and ok
GAWBTOOLS is the name, click connect
Click Use another account
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Gladstone Area Water Board Emergency Communications Plan 2019
Fill in the details with your username and password and click ok.
When logged on start Xplorex.
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Gladstone Area Water Board Emergency Communications Plan 2019
Inbox Tab Click button Select Subscriber or Select Groups For numbers not in list manually type in field under select groups button and press select phone button
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Gladstone Area Water Board Emergency Communications Plan 2019
Select Subscriber or group and press add checked
Click templates Drop down arrow for pre-typed message or manually type in text box
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Gladstone Area Water Board Emergency Communications Plan 2019
Click on relevant message
Once everything is ok press send now
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Gladstone Area Water Board Emergency Communications Plan 2019
Emergency Communications Plan Appendix E - GAWB App (Skoolbag) Admin Console
The GAWB App has been introduced to enable communication with key customers, primarily during an emergency event. The benefit of the App is that it requires minimal phone coverage to send and receive messages as compared to emails, websites or social media such as Facebook and it is an app to app communication meaning it is almost immediate.
During an emergency event, it is likely that telecommunications coverage will be affected to some degree.
Logging into the Skoolbag Admin Console Open a web browser (e.g. Google Chrome, IE, Safari etc.) on a computer or tablet device.
Please note: If you are using Internet Explorer ensure that it is the newest version as some aspects of the admin console will not operate properly with old Explorer versions. (The best browser to use is Google Chrome). In the address bar in the web browser type in www.skoolbag.com.au and press enter, click on the member login link on the top right hand corner. Login using the login details that were emailed to you as an administrator.
Adding Entries/Alerts The menu on the left hand side of the page will display as below. You can add entries to any of the following: Public Alerts Boyne Valley Alerts Pikes Crossing Alerts Staff Notices Incident Management Team
Please note: Staff notices, Incident Management Team, Pikes Crossing and Boyne Valley categories require a password to be entered to see content in these areas. (ie. The general public will not be able to see what is posted in these alerts).
Click the hyperlink for ‘entries’ next to the category you want to update. A second menu will display on the right hand side of the screen. Click ‘add’ on the right hand side.
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Gladstone Area Water Board Emergency Communications Plan 2019
Enter the name of the alert. Select ‘Send Push Notification Alert’ and choose whether to send immediately or schedule for later. Select whether to ‘Send to all’ or to only a specific group of people (Pikes Crossing, Boyne valley, Staff, Incident Management Team).
Select email as well if required then the users you wish the detail to go to. Enter the description.
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Gladstone Area Water Board Emergency Communications Plan 2019
Add in any links, photos, PDF docs or maps if required. Once complete press ‘submit’.
This process applies to all entries, you have the capacity to choose most of the above. Just need to consider the audience you are sending too.
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Gladstone Area Water Board Emergency Communications Plan 2019
Updating Entries/Alerts Select ‘entries’ from the left hand side menu and ‘edit’ from beside the entry you wish to edit.
Deleting Entries/Alerts Select ‘entries’ from the left hand side menu and ‘edit’ from beside the entry you wish to edit.
Adding Admin Users Admin Users can be updated or added by the following staff only: Manager Safety and Compliance Communications Officer O & M Corporate Services Coordinator
Select ‘Admin Users’ under ‘Admin Stuff’. It is recommended to have approximately three staff with Admin Access at any time. Approval to add new Administrators should be given by the Incident Controller.
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Gladstone Area Water Board Emergency Communications Plan 2019
Select ‘Add’ from the right hand side.
Complete the ‘User Details’ on the left hand side, give permission to ‘Manage Entries’ only and then ‘Save’.
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Gladstone Area Water Board Emergency Communications Plan 2019
Emergency Communications Plan Appendix F – Website Update Procedure
To be developed once user guide available
Emergency Communications Plan Appendix G – Industrial Contacts List
Managed and maintained on the GAWB Intranet site (to be printed)
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Awoonga Dam Emergency Action Plan
Appendix C. SDCC Emergency Alert Template & Procedures
C.1 Emergency Alert Activation Procedures
In the event that the dam fails or dam breach is anticipated within four hours, GAWB can activate the Emergency Alert Polygon lodged with the SDCC. This triggers an SMS / text to speech message to all landlines and mobiles located within the lodged impact area polygon. This polygon includes the areas downstream of the dam anticipated to be impacted for a dam failure during a PMF event.
The procedures, contact details and forms to activate the Emergency Alert are included in the ECP and reproduced here: 1) Incident Manager makes the decision to warn via Emergency Alert based on: a) Is there a potential for loss of life and/or a major threat to a significant number of properties or the environment? b) Is the community required to take action or is urgent action required due to the time of the situation i.e. in the night? c) Is there adequate time available to process and approve the use of an EA to disseminate the community warning message? 2) Contact SDCC Watch Desk on 07 3635 2387 or 0408 190 872 a) Provide your name and contact phone number. Request and record name of SDCC Watch Desk officer. b) Advise your intention to use the Emergency Alert system for an Awoonga Dam Emergency Event. c) Request SDCC Watch Desk to locate GAWB’s pre-loaded polygon PM Fevent_GAWB_01.kml d) If required, request verbal activation of Emergency Alert. Otherwise, advise Request Form will be emailed 3) Email completed Emergency Alert Template Request Form to SDCC Watch Desk at: [email protected] a) Check Emergency Alert Template Request Form, and complete any remaining elements b) Pre-populated Word Document is located at: ECM (Ref#6124685) https://gaw.t1cloud.com/T1Default/CiAnywhere/Web/GAW/RedirectToFunction?sk.DocumentSetId=6124685&f= %24EMC.DOC.PROP.MNT&suite=ECM&h=uTsRBaK7nY&t=BE07746 c) Emergency Alert Polygon in .kml format if required PMFevent_GAWB_01.kml is located within the GAWB GIS Mapping System d) Form must be sent from a GAWB email address by Incident Manager, or CEO. 4) Contact SDCC Watch Desk to confirm receipt of Request Form. Request an email confirmation once message is sent. 5) Be ready to complete the Incident Coordinator Checklist to confirm the Polygon Area and Message Playback with SDCC Watch Desk if requested. 6) Continue with other warning mechanisms (direct notification, LDMG notification) according to the Event Notification Table. NOTES: 1) The Emergency Alert system is a National System with alerts processed based on level of severity. Warning requirements in other jurisdictions could affect the timing and efficiency of warnings sent via the Emergency Alert System, particularly during extreme weather events. 2) Based on testing, timing of phone alerts will take at least 20 minutes from issue and SMS alerts 2 minutes. 3) Once the SDCC Emergency Alert has been activated, warnings via other methods should be implemented.
Review Date – September 2020 93 Awoonga Dam Emergency Action Plan
C.2 Emergency Alert Template
Pre-populated Word Document is located at: ECM (Ref#6124685) https://gaw.t1cloud.com/T1Default/CiAnywhere/Web/GAW/RedirectToFunction?sk.DocumentSetId=6124685&f=%24EMC.D OC.PROP.MNT&suite=ECM&h=uTsRBaK7nY&t=BE07746
Review Date – September 2020 94 Awoonga Dam Emergency Action Plan
EMERGENCY ALERT REQUEST FORM
Date Time
Incident/Event: Awoonga Dam Failure
Requesting Officer: Contact Details: (name, contact number and email address, position. Local Government) Chief Engineer, Gladstone Area Water Board PO Box 466, Gladstone QLD 4680 EMERGENCY ALERT REQUEST
March 2015 Prepared By: Position:
Event Type Cyclone Flash Flood Flood Storm Surge Tsunami* Bushfire Chemical Spill Fire Incident Smoke or Toxic Plume Other (please specify): *NB. Tsunami EA campaigns will be sent as Location Based Text Message ONLY
Message Severity Emergency Warning** Watch & Act Advice **N.B. activates the SEWS
Campaign Mode Voice SMS – Location Based SMS – Service Address Based
LDMG Advised? YES NO (as per the Awoonga Dam Emergency Action DDC Advised? YES NO Plan)
Threat Direction Required? YES NO Note: Can only be used for Emergency Warnings. Indicate direction on map
1. EA Polygon Area: Map attached
2. Spatial format: Use only these file extensions: Indicate the format used: For spatial data, is it ESRI *.dbf, *.prj, *.shp, *.shx supplied via GML *.gml, *.xsd DMportal - specify filenames below KML *.kml FTP - specify MapInfo TAB *.dat, *.id, *.map, *.tab filenames below MapInfo Mid/Mif *.MIDI Sequence, *.mif Filename: Email PMFevent_GAWB_01 Other (please specify) 3. Handwrite (please use capitals for clarity) or Type Voice message (Ideally message should be less than 450 characters) Emergency. Emergency. A-WONGA Dam is expected to fail. Dam failure will result in dangerous downstream flooding in low lying areas near the Boyne River including BEN-AR-BE, BOYNE ISLAND and TANNUM SANDS. Residents need to act to protect life, and move to high ground immediately. Do not delay. Follow any Queensland Police Service evacuation advice.
4. Type or handwrite SMS below (maximum of 160 characters including spaces) Awoonga Dam is expected to fail. Take action to protect life and move to high ground immediately. Follow any QPS evacuation advice. Info on ABC radio.
For use by SDCC Authorising Officer Name: Manual Transmission: EMS Transmission: EA User Name: EMS Report ID: ______
EA Guidelines and the Emergency Alert Request Form Template are available at: www.disaster.qld.gov.au
Review Date – September 2020 95 Awoonga Dam Emergency Action Plan
Review Date – September 2020 96 Awoonga Dam Emergency Action Plan
C.3 Emergency Alert Polygon
PMFevent_GAWB_01.kml is located within the GAWB GIS system.
Review Date – September 2020 97 Awoonga Dam Emergency Action Plan
Figure C.1 : Emergency Alert Polygon
Review Date – September 2020 98 Awoonga Dam Emergency Action Plan
C.4 Emergency Alert Requestor Checklist
Review Date – September 2020 99 Awoonga Dam Emergency Action Plan
Appendix D. Drawings and Technical Information
D.1 General Arrangement: Drawing GN1002
D.2 Embankment Arrangement: Drawing EM1051
D.3 Embankment Arrangement: Drawing EM1052
D.4 Spillway Concrete: Drawing SP1151
D.5 Spillway Right Abutment: Drawing SR1251
D.6 Saddle Dam No.3: Drawing 100-C-00051 and 100-C-00059
D.7 Saddle No.6 Auxiliary Spillway: Drawing 100-C-00077 and 100-C-00079
D.8 Discharge Rating Curves
Review Date – September 2020 100
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GHD HAS PREPARED THESE DRAWINGS ON THE BASIS OF W INFORMATION PROVIDED BY: *GLADSTONE AREA WATER BOARD W *GOLDING CONTRACTORS WHICH GHD HAS NOT INDEPENDENTLY VERIFIED OR CHECKED ("UNVERIFIED INFORMATION") BEYOND THE AGREED SCOPE OF WORK. W GHD EXPRESSLY DISCLAIMS RESPONSIBILITY IN CONNECTION WITH THE UNVERIFIED INFORMATION, INCLUDING (BUT NOT LIMITED TO) ERRORS IN, OR OMISSIONS FROM, THE DRAWINGS, WHICH WERE W CAUSED OR CONTRIBUTED BY THE UNVERIFIED INFORMATION.
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7337400 325900 326000 326100 326200 326300 326400 326500 326600 AS BUILT Gladstone Area Water Board
145 Ann St Brisbane QLD 4000 Australia GPO Box 668 Brisbane QLD 4001 T 61 7 3316 3000 F 61 7 3316 3333 E [email protected] W www.ghd.com
Plot Date: 18 August 2015 - 9:24 AM Plotted by: Jeremy Wilmot Cad File No: G:\41\25884\CADD\Drawings\100-C-00051.dwg Plot Date: AS BUILTDISCLAIMER *GOLDING CONTRACTORS *GLADSTONE AREAWATERBOARD CAUSED ORCONTRIBUTEDBYTHEUNVERIFIED INFORMATION. ERRORS IN,OROMISSIONSFROM,THEDRAWINGS,WHICHWERE WITH THEUNVERIFIEDINFORMATION,INCLUDING(BUTNOTLIMITEDTO) GHD EXPRESSLYDISCLAIMSRESPONSIBILITYINCONNECTION ("UNVERIFIED INFORMATION")BEYONDTHEAGREEDSCOPEOFWORK. WHICH GHDHASNOTINDEPENDENTLYVERIFIEDORCHECKED INFORMATION PROVIDEDBY: GHD HASPREPAREDTHESEDRAWINGSONTHEBASISOF 18 August 2015 - 9:48 AM Plotted by: Jeremy Wilmot
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AS BUILT Gladstone Area Water Board
145 Ann St Brisbane QLD 4000 Australia GPO Box 668 Brisbane QLD 4001 T 61 7 3316 3000 F 61 7 3316 3333 E [email protected] W www.ghd.com
Plot Date: 18 August 2015 - 10:20 AM Plotted by: Jeremy Wilmot Cad File No: G:\41\25884\CADD\Drawings\100-C-00077.dwg AS BUILT DISCLAIMER GHD HAS PREPARED THESE DRAWINGS ON THE BASIS OF INFORMATION PROVIDED BY: *GLADSTONE AREA WATER BOARD *GOLDING CONTRACTORS WHICH GHD HAS NOT INDEPENDENTLY VERIFIED OR CHECKED ("UNVERIFIED INFORMATION") BEYOND THE AGREED SCOPE OF WORK. GHD EXPRESSLY DISCLAIMS RESPONSIBILITY IN CONNECTION WITH THE UNVERIFIED INFORMATION, INCLUDING (BUT NOT LIMITED TO) ERRORS IN, OR OMISSIONS FROM, THE DRAWINGS, WHICH WERE CAUSED OR CONTRIBUTED BY THE UNVERIFIED INFORMATION.
AS BUILT Gladstone Area Water Board
145 Ann St Brisbane QLD 4000 Australia GPO Box 668 Brisbane QLD 4001 T 61 7 3316 3000 F 61 7 3316 3333 E [email protected] W www.ghd.com
Plot Date: 18 August 2015 - 10:23 AM Plotted by: Jeremy Wilmot Cad File No: G:\41\25884\CADD\Drawings\100-C-00079.dwg Awoonga Dam Emergency Action Plan
D.8 Discharge Rating Curves
The discharge rating curve at Awoonga Dam is provided below. The curve shows the combined dam outflows for: • Stage 1: Main Spillway Outflow • Stage 2: Main Spillway + Auxiliary Spillway at Saddle 6 • Stage 3: Main Spillway + Auxiliary Spillway at Saddle 6 + overtopping of Saddle Dams 3 and 4.
Figure D.1 : Spillway Discharge Rating Curve (GHD, 2015) (these graphs provide outflows under three scenarios, not related to the upgrades)
Review Date – September 2020 101 Awoonga Dam Emergency Action Plan
Appendix E. Forms The following forms may be used during a dam hazard or emergency event:
• Awoonga Dam Spilling Event Communication Sheet • Awoonga Dam Non-Flood Event Communication Sheet • GAWB Incident-Emergency Running Log • GAWB Piezometer Seepage Readout Book • GAWB Awoonga Dam Emergency Event Inspection Checklist • Register of persons staying at Awoonga Dam Recreation Area during an emergency
(these documents can be found in GAWB Controlled Documents)
Review Date – September 2020 102 AWOONGA DAM EMERGENCY EVENT INSPECTION CHECKLIST
Date: Time: Inspected By:
Weather Conditions: Water Surface Level: Spillway Discharging? YES NO
DAM CREST Any depressions/cracks/changes YES NO Any deformation/movement/cracks/changes? YES NO UPSTREAM FACE Any deformations of crest etc. YES NO (CONCRETE/ Comments: SHOTCRETE) Any depressions/cracks of road surface YES NO
Comments: DOWNSTREAM Any unusual or changed features - YES NO FACE OF Evidence of movement, slumping, EMBANKMENT subsidence or new seepage? Any unusual or changed features - YES NO Comments: DAM ABUTMENT/ Evidence of movement, slumping, RETAINING subsidence or new seepage? WALLS Comments: SPILLWAY AND Any obstructions or damage to spillway? YES NO SPILLWAY GALLERY Is there any significant flow YES NO observed in the gallery drain? SPILLWAY Any obstructions or damage? YES NO CHUTE AND Any depressions/cracks/changes? YES NO Does the gallery instrumentation YES NO DOWNSTREAM indicate some significant changes CHANNEL Any deformation of retaining walls, etc. YES NO in the readings? Are there areas with significant seepage YES NO Any structural fatigue in gallery wall? YES NO through the concrete or seepage drains of the spillway? Comments: Comments:
V-NOTCH Are they working properly? YES NO WEIRS DOWNSTREAM Any obstructions or damage? YES NO Any new seepage? YES NO TOE Any depressions/slumps/changes? YES NO Comments: Any deformation, subsidence of ground sur- YES NO face? Read Rain Gauge: mm Any obstructions or damage? YES NO INTAKE TOWER/S Fish Observed: YES NO Qty: Any leaks/cracks/changes? YES NO INCIDENT LOG - Inspection Entered in Incident Log? YES NO Any deformation of concrete, pipes etc. YES NO www.gladstoneprinting.com.au
Inspected By: Comments:
Sign: Date: PIEZOMETER AND SEEPAGE READOUT SHEET
SEEPAGE READOUT PIEZOMETER READOUT For the recording of seepage weir depths during an For the recording of piezometer readouts during an emergency event only. emergency Not to be used for daily operations. event only. Not to be used for daily operations. Date Date Time
2A Time 2B Spillway Founda- 2C tion Drain V Notch Weir V1 3A Spillway Founda- 3B tion Drain V Notch Weir 3C V2 Spillway Founda- 4A tion Drain V Notch Weir 4B V3 4C Downstream 1 5A
5B Downstream 2 5C www.gladstoneprinting.com.au 6A
Inspected By: 6B
6C Signed: 7A
7B Date: Forward copies of the completed form or data to the Incident Coordinator, 7C Gladstone Area Water Board for further necessary action. GLADSTONE AREA WATER BOARD INCIDENT/EMERGENCY RUNNING LOG
INCIDENT TYPE
LOCATION
DATE/TIME
NAME
POSITION
Time Details Actioned www.gladstoneprinting.com.au Awoonga Dam Spilling Event Communication Sheet Advice No Date: Time of issue
Current situation
Measured Lake Level: Level Condition Time of record (eg rate of rise) Awoonga Dam
Measured Steam Level: Level Condition Time of record (eg rate of rise) Diglum Creek at Marlua
Boyne River at Milton
B.o.M. Forecast Rainfall: 24 hours 96 hours Time of Forecast
Catchment average rainfall over period (mm)
Predicted water levels Lake Awoonga
Scenario, based on Peak Water Time of Peak current situation and Level Water Level Recorded rainfall & no further rainfall Recorded rainfall & B.o.M. forecast rainfall
Next communication
24 hours
12 hours
6 hours
Other notes
ECM_154503_v2_Form Awoonga Dam Spilling Event Communication Sheet.docx Page 1 of 1
Awoonga Dam Non-Spilling Event Communication Sheet
Advice No Date: Time of issue
Current situation
Measured Lake Level Level Condition Time of record (eg rate of rise) Awoonga Dam
Short Description of issue: eg, earthquake measuring 3.5:
Information on dam status: (eg, stable) and assessment on likely outcomes
Advice for communication to public:
Recommendation
No Action
Evacuate
Next communication
24 hours
12 hours
6 hours
Other notes
Form Awoonga Dam Non Spilling Event Communication Sheet.docx Page 1 of 1
REGISTER OF PERSONS STAYING AT THE RECREATION AREA
Date ………………………………………………
Copy to be forwarded to Incident Records and Administration Officer when a “Cyclone Warning” is issued.
Emergency Contact Details1 Name of Person Adult / Youth / Infant Location Where Sheltering Name Contact Phone No.
Page ………………..
1 Person to be contacted in the event of an emergency or serious injury.
Emergency Contact Details2 Name of Person Adult / Youth / Infant Location Where Sheltering Name Contact Phone No.
2 Person to be contacted in the event of an emergency or serious injury. Awoonga Dam Emergency Action Plan
Appendix F. Equipment List
A series of items will be required by the IMT in order to manage the implementation of the EAP. A standing 6- monthly Work Order exists for a check of the availability and function of this equipment.
F.1 Personal items
Each member of the IMT will require the following: • Hard copy of the following plans: - Awoonga EAP - Emergency Communications Plan and Contacts List - GAWB Emergency Management Plan - Cyclone Action Plan - Business Recovery Plan • USB / CD loaded with PDF electronic copy of individual detailed flood distributed with Controlled Copy of Awoonga EAP. • Electronic keys to buildings • GAWB photo ID • IPad and smart phone with chargers • GAWB Radio sets • Notebook(s), pens and pencils • Torch and spare batteries • Personal Protective Equipment (PPE) - High Visibility Vest - Safety Boots - Hard hat - Long sleeved shirt, long pants - Rain coat or similar protective clothing
Review Date – September 2020 103 Awoonga Dam Emergency Action Plan
F.2 136 Goondoon St and Gladstone Water Treatment Plant
Below is a list of equipment required to be at both 136 Goondoon Street and the Gladstone Water Treatment Plant during an emergency. These items should be permanently located at the site. A standing 6-monthly Work Order exists for a check of the availability and function of this equipment. • Hard copy of the following plans: - Awoonga EAP - Emergency Communications Plan and Contacts List - GAWB Emergency Management Plan - Cyclone Action Plan - Business Recovery Plan • Hardcopy of the detailed flood mapping • Hard copies of forms included in Appendix E of the EAP • Satellite Phone (and charger) • Torch and spare battery • Laptop computer (2 of) with flood models preloaded and fully charged / power supply • GAWB magnetic vehicle signs • Telephone contact lists and telephone book • Hand held UHF radio (and charger and / or batteries) • Battery powered radio complete with spare batteries (listen to weather reports and warnings broadcast by the media) • Generator (136 Goondoon Street only) • Drone (136 Goondoon Street only) • Fuel Trailer (Gladstone Water Treatment Plant only)
F.3 Awoonga Dam Pump Station
Hard copies of the following documents should be permanently located at the Awoonga Dam Pump Station. A standing 6-monthly Work Order exists for a check of the availability of these plans. • Awoonga EAP • Emergency Communications Plan and Contacts List • GAWB Emergency Management Plan • Cyclone Action Plan • Business Recovery Plan • Hard copies of forms included in Appendix E of the EAP
Review Date – September 2020 104 Awoonga Dam Emergency Action Plan
F.4 Awoonga Dam Recreation Area Workshop
Below is a list of equipment required to be at the Awoonga Dam Recreation Area Workshop during an emergency. A number of these items should be permanently located at the site. A standing 6-monthly Work Order exists for a check of the availability and function of this equipment. • Hard copy of the following plans: - Awoonga EAP - Emergency Communications Plan and Contacts List - GAWB Emergency Management Plan - Cyclone Action Plan - Business Recovery Plan • Hard copies of forms included in Appendix E of the EAP • Notebook(s), pens and pencils • Satellite Phone (and charger) • Two torches and spare batteries • Backpack to allow hands free movement around the dam • Laptop computer (optional) • GAWB magnetic vehicle signs • Telephone contact lists and telephone book • Hand held UHF radio (and charger and / or batteries) • Battery powered radio complete with spare batteries (listen to weather reports and warnings broadcast by the media) • Telephone contact lists and telephone book • Binoculars • Water sufficient for at least 4 days • Candles and matches • A stock of non-perishable food and other essentials to sustain staff and 2 additional persons for up to 3 days if situation escalates • First aid kit, fully stocked with up to date items • Spare Personal Protective Equipment such as: - High Visibility Vest - Safety Boots - Hard hat - Long sleeved shirt, long pants - Rain coat or similar protective clothing
Review Date – September 2020 105 Awoonga Dam Emergency Action Plan
Appendix G. Affected Area Maps
The following overview maps of affected areas are provided in this Appendix: • Figure G.1 : Areas affected in 1 in 100 AEP event • Figure G.2 : Areas affected in Probable Maximum Flood with Saddle Dam 3 Failure • Figure G.3 : Upstream areas affected by flooding • Figure G.4 : Taragoola Quarry area
It is noted that the Sunny Day Failure and PMF Failure extent of inundation is very similar and Figure G.2 provides a reasonable representation of the area affected in the Sunny Day Failure event.
These maps are based on the most recent flood modelling undertaken for Awoonga Dam (GHD, 2015) and represent the best understanding of the area likely to be affected for each dam hazard event or emergency event.
Detailed flood mapping for a full range of flood levels, from the 1 in 100 AEP event to the PMF with Saddle Dam 3 Failure, is available on GIS at GAWB, and a copy provide to Gladstone Regional Council for LDMG.
A copy of this detailed mapping for the full range of events is also available on the GRC GIS system.
A paper copy of detailed flood mapping is kept at the following locations • GAWB Emergency Management Centre, Level One, 136 Goondoon Street • GAWB Main Building Gladstone Water Treatment Plant • GAWB Chief Engineers’ Office, Level 3, 136 Goondoon Street A PDF electronic copy of individual detailed flood maps available on the GAWB local area network at L:\GAWB DRAWINGS\000 - General\General\00001-00150\Vendor - Reference Dwg's\GHD\41-23871-26 GIS Flood inundation files, and distributed on USB or CD with main text per distribution list.
Table G.1 provides a full list of the events for which detailed GIS mapping is available.
Table G.1 : Full list of events available in detailed GIS
Event Lake Level (m AHD) Comment
1 in 50 AEP 44.7 EAP Stand Up. First evacuation.
1 in 100 AEP 45.4
1 in 1,000 AEP 47.8 Multiple evacuations Pikes Crossing. Top of clay liner Taragoola Quarry Bunds 47.9m.
1 in 2,000 AEP 48.4
1 in 10,000 AEP 50.4 Saddle 6 Auxiliary Spillway Active at 50.1m.
1 in 20,000 AEP 51.3
1 in 50,000 AEP 52.4 No Failure.
1 in 100,000 AEP 53.2 No Failure.
PMF 55.6 No Failure.
PMF with failure of Saddle Dam 3 55.4
Sunny Day Failure 40.0 No Flood. Infrastructure failure or massive earthquake.
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Figure G.1 : Areas affected in 1 in 100 AEP event
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Figure G.2 : Areas affected in Probable Maximum Flood with Saddle Dam 3 Failure
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Figure G.3 : Upstream areas affected by flooding
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Figure G.4 : Taragoola Quarry area
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Awoonga Dam Emergency Action Plan Emergency Event Report Start Date – End Date
Contents 1 Overview of Event ...... 3 2 Implementation of EAP ...... 3 2.1 EAP Activation ...... 3 EAP 55.X Alert ...... 3 EAP 5.X Lean Forward ...... 3 EAP 5.X Stand Up ...... 3 2.2 EAP Closure ...... 3 EAP 5.X Stand down ...... 3 3 Communications during EAP ...... 3 3.1 Notifications to Public ...... 3 Communication Group A (Pikes Crossing) ...... 3 Notifications to Communication Group B (Boyne Valley) ...... 3 Notifications to Communication Group X (XX) ...... 3 3.2 Department of Natural Resources, Mines and Energy ...... 3 3.3 Local Disaster Management Group ...... 4 3.4 Other Communications ...... 4 4 Monitoring during EAP...... 4 4.1 Flood Modelling ...... 4 4.2 Dam Infrastructure ...... 4 4.3 Recreational Areas ...... 5 5 Damage Assessment ...... 5 5.1 Dam Infrastructure ...... 5 5.2 Other Areas ...... 5 6 Assessment of EAP Effectiveness ...... 5 7 Recommended Improvements of EAP ...... 5 8 Other Matters Relevant to the Event ...... 5 9 Conclusions ...... 5 Appendix A Awoonga Dam Event Communication Notices ...... 6 Appendix B Register of External Communications ...... 7 Appendix C Awoonga Dam Emergency Event Inspection Checklists ...... 8 Appendix D Piezometer and Seepage Readout Sheets ...... 9
1 Overview of Event [Provide an overall summary of the event] The following report details the event and EAP actions undertaken.
2 Implementation of EAP 2.1 EAP Activation [Provide a summary of the implementation of each EAP Action Table and Activation Level implemented]
EAP 55.X Alert
EAP 5.X Lean Forward
EAP 5.X Stand Up
2.2 EAP Closure EAP 5.X Stand down
3 Communications during EAP 3.1 Notifications to Public [Summarise Notifications to each Communication Group listed in EAP X.X] Communication Group A (Pikes Crossing) GAWB notifies residents potentially affected by Awoonga Dam operations during an EAP event. This includes residents directly downstream of the dam wall, in the Pikes Crossing area, whose access becomes cut when Pikes Crossing becomes inundated by stream flows from the spilling dam. GAWB provides updates to the residents during an event and alternate access for these residents via the spillway bridge when the crossing becomes inundated. GAWB had X communications with Pike Crossing residents during this event. Notifications to Communication Group B (Boyne Valley) Lake level rise also inundates a low ‐lying section of the Gladstone to Monto Road in the Boyne Valley (at a level of around 41.5m). GAWB communicates level rises and likely inundation with Boyne Valley residents throughout the event. GAWB had X communications with Boyne Valley residents during this event. Notifications to Communication Group X (XX) 3.2 Department of Natural Resources, Mines and Energy [Summarise interactions with DNRME]
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Dam safety is regulated by the Department of Natural Resources, Mines and Energy (DNRME). During a Dam Emergency Event GAWB provides regular notification to DNRME of the weather conditions and model output for water level rise. DNRME was notified as per the Awoonga Dam EAP, with X email communications issued from the initiation of the EAP on DATE until its closure on DATE. Email notifications include a summary of flood modelling and relevant EAP actions and issues, such as communications to PAR and dam safety checks. They also include the latest Awoonga Dam Spilling Event Communication Sheet, which provides data on the current situation and the flood modelling predictions for the next time‐period relevant to the EAP level. 3.3 Local Disaster Management Group [Summarise interactions with LDMG] The Local Disaster Management Group (LDMG) stood up on DATE to deal with XX SITUATION. GAWB, as an advisory member, attended all the LDMG meetings until it stood down on DATE. As a Category 2 referable dam owner, GAWB’s role on the LDMG is to provide flooding and infrastructure advice related to the Awoonga Dam. GAWB attended all LDMG meetings and provided regular EAP updates both at meetings and via email. 3.4 Other Communications [Summarise any other communications] GAWB staff were kept informed about the event via email updates. GAWB kept the general community informed via social media and media releases made throughout the event.
4 Monitoring during EAP 4.1 Flood Modelling [Summarise flood modelling undertaken] The Flood Engineers undertake weather monitoring and flood modelling on a regular basis in the lead up to and during an event. The time‐period between modelling is dependent on the EAP level, with more frequent modelling undertaken as the EAP escalates. The Flood Engineers are responsible for the collection and interpretation of rainfall and predicted weather condition information for input into the Awoonga Water Level Prediction Model (WLPM), as well as technical assistance regarding the dam structure as required. Flood modelling was undertaken throughout the event at the frequency appropriate to the EAP level. X communication sheets were issued between DATE and DATE. Awoonga Dam Communications Sheet can be found in Appendix A. 4.2 Dam Infrastructure Dam safety checks are undertaken by the Dam Safety Inspector, who monitors the dam and appurtenant structures as per the EAP. Dam safety checks were undertaken as per the relevant EAP level. Awoonga Dam Emergency Event Inspection Checklist and Piezometer and Seepage Readout Sheets can be found in Appendix B. Raw data from the piezometers is provided in Appendix C.
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[Describe other actions taken relating to dam infrastructure ie isolation of HV connection to main intake tower] 4.3 Recreational Areas [Describe closure of Recreation Areas, and management of people who chose to remain] The Lake Awoonga Recreational Area and the Boynedale Bush Camp was closed to the public on DATE, as per Table 7.2: Notification Table 1: Flood Inflows of the Awoonga Dam Emergency Action Plan. Keys and access for the Caravan Park and house residents was provided through the main gates.
5 Damage Assessment 5.1 Dam Infrastructure [Describe any damage to dam infrastructure & related actions taken if] Table 1: Damage and Actions Taken Damage Action Taken
5.2 Other Areas [Describe any damage to any other areas & related actions taken, ie recreational areas]
Table 2: Damage and Actions Taken Damage Action Taken
6 Assessment of EAP Effectiveness [Provide an assessment of the effectiveness of the EAP as implemented.]
7 Recommended Improvements of EAP [Recommend any improvements to the EAP.]
8 Other Matters Relevant to the Event [Comment on any other relevant matters if necessary.]
9 Conclusions [Provide an overall conclusion on the event and EAP implementation]
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Appendix A Awoonga Dam Event Communication Notices
Appendix B Register of External Communications
Appendix C Awoonga Dam Emergency Event Inspection Checklists
Appendix D Piezometer and Seepage Readout Sheets
Awoonga Dam Emergency Action Plan
Appendix I. Notice
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