EMERGENCY ACTION PLAN – SPLITYARD CREEK DAM
ISSUE: 13 Date: February 2020
Prepared by CS Energy/GHD Limited 1
Controlled Copy No:
Gated: No Manned: Yes 2
Type: Earth and rock-fill embankment Project: Splityard Creek Dam EAP File no.: F/19/1991 Rural no.: 683 Wivenhoe Somerset Road (Power Station) Location: Lat. -27.371944o (27°22'19"S) Lon. 152.640833o (152°38'27"E)
DISCLAIMER: This report has been produced by CleanCo to provide information for client use only. The information contained in this report is limited by the scope and the purpose of the study and should not be regarded as completely exhaustive. This report contains confidential information or information which may be commercially sensitive. If you wish to disclose this report to a third party, rely on any part of this report, use or quote information from this report in studies external to the Corporation, permission must first be obtained from the Chief Executive, CleanCo.
1 SunWater template 2 Monday to Friday Splityard Creek Dam - 2019/20 - i13
Emergency activation quick reference – Dam hazards
The Emergency Action Plan (EAP) for Splityard Creek Dam covers three emergency conditions evaluated within CleanCo’s Dam Safety Management Program. Use Table 1 to select the relevant section of the EAP that deals with the emergency condition. Note: The Incident Coordinator (IC) is responsible for activating the EAP unless otherwise directed by the Dam Safety Technical Decision Maker (DSTDM). Should the IC be unavailable, the Dam Duty Officer (DDO) is responsible. Table 1: Emergency activation quick reference – Dam hazards
Dam hazards and Activation levels for dam hazards section numbers Alert Lean Forward Stand Up Stand Down
Piping: embankment, • Increasing leakage through dam • Increasing leakage through an 1. Piping condition has been established • Risk assessment has determined that foundation or embankment, foundations or abutments embankment, the foundations or 2. Failure in progress or likely due to piping, and sufficient piping risk has reduced abutments abutments with cloudy water water in storage to create a dam failure hazard See section 5 • EAP activated Earthquake • Earthquake reported or felt in the area • Earthquake reported or felt in the area 1. Earthquake reported or felt in the area, and a possible • No change detected or no damage found failure path has been identified during the inspections, or See section 6 • Intensity less than 5 MM (using Modified • Intensity greater than or equal to 5 MM, or Mercalli Scale in Appendix H Figure 13 2. Failure in progress or likely due to earthquake, and • Intensity less than 5 MM and change • Risk assessment has determined that sufficient water in storage to create a dam failure detected during surveillance inspection failure risk has reduced to an acceptable hazard • EAP activated level • Repairs completed as necessary Terrorist threat / activity • Alert/brief received from QPS Security and Counter-Terrorism Command relevant to dam 1. Possible terrorist activity or suspicious behaviour noticed • No damage found during the inspections, or or high energy impact at the dam, threat received relevant to dam safety, and safety • EAP activated Risk assessment has determined that See section 7 failure risk has reduced 2. Large explosion heard/observed at the dam (e.g. bomb • Repairs completed as necessary explosion, aircraft hit), and damage observed on the dam 3. Failure in progress or likely due to impact or explosion, and sufficient water in storage to create a dam failure hazard
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Table of Contents Emergency activation quick reference – Dam hazards ...... ii Document control ...... viii Document revision history ...... ix Controlled document distribution list ...... x 1. References, abbreviations and definitions ...... 1 1.1 References/associated documents ...... 1 1.2 Abbreviations and acronyms ...... 3 1.3 Business terms and definitions ...... 2 2. Introduction ...... 5 2.1 Context ...... 5 2.2 Purpose ...... 6 2.3 Scope ...... 6 2.4 CleanCo provides training ...... 6 2.5 Dam emergency organisation within CleanCo ...... 7 2.6 Community information ...... 7 2.7 Lessons Learnt ...... 8 2.8 Downstream notification lists ...... 8 2.9 Comprehensive Risk Assessments ...... 8 3. Roles and responsibilities ...... 9 4. Dam details ...... 13 4.1 General dam information ...... 13 4.2 Population at risk ...... 14 4.3 Spillway adequacy and reservoir water releases ...... 14 4.4 General arrangement ...... 14 4.5 Emergency inspections and monitoring ...... 15 5. Dam hazard – Piping: embankment, foundation or abutments ...... 16 5.1 Overview ...... 16 5.2 Emergency Actions ...... 16 6. Dam hazard – Earthquake ...... 24 6.1 Overview ...... 24 6.2 Emergency Actions ...... 24 7. Dam hazard – Terrorist threat/activity or high energy impact ...... 32 7.1 Overview ...... 32
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7.2 Emergency Actions ...... 32 Notifications and communication lists ...... 39 Flood impact downstream and inundation maps...... 54 Routine and emergency access routes ...... 57 Machinery and equipment ...... 59 Technical information ...... 60 Summary of legal requirements ...... 68 Notices from local government and district groups including responses ..... 69 Emergency action plan – Toolkit ...... 72
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List of Tables Table 1: Emergency activation quick reference – Dam hazards Table 2: Splityard Creek Dam specifications Table 3: Piping: Embankment, foundation or abutments – DDO emergency action Table 4: Piping: Embankment, foundation or abutments – IC emergency action Table 5: Piping: Embankment, foundation or abutments – IC external communication plan Table 6: Piping: Embankment, foundation or abutments –DSTDM emergency action Table 7: Earthquake – DDO emergency action Table 8: Earthquake – IC emergency action Table 9: Earthquake – IC external communication plan Table 10: Earthquake –DSTDM emergency action Table 11: Terrorist threat/activity or high energy impact – DDO emergency action Table 12: Terrorist threat/activity or high energy impact – IC emergency action Table 13: Terrorist threat/activity or high energy impact – IC external communication plan Table 14: Terrorist threat/activity or high energy impact –DSTDM emergency action Table 15: List of machinery and equipment available during an emergency
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List of Figures Figure 1: CleanCo emergency response organisation Figure 2 Plan of the Splityard Creek Dam Figure 3: Dam hazard - Piping: embankment, foundation or abutments flowchart Figure 4: Dam hazard - Earthquake flowchart Figure 5: Terrorist threat/activity or high energy impact Figure 6: Emergency alert polygon Figure 7: Sunny Day Failure (SDF) flood extent and PAR property locations Figure 8 Emergency Alert Request form Figure 9: Modelled peak flood velocities Figure 10: Modelled peak flood depths Figure 11 Map of emergency access routes Figure 12: Local Government Notice Figure 13 Modified Mercalli Scale for Felt earthquake magnitude assessment
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Document control
Authorisation of document This document has been reviewed and accepted by the following:
Name Position/role Signature/date GHD Technical Director – Prepared for See B/D/19/21075 Submission GHD Senior Technical Director – Reviewer See B/D/19/21075
CS Energy Site Manager Wivenhoe – See B/D/19/21075 Prepared for submission CS Energy Lead Hydro Engineer – Reviewer See B/D/19/21075
CS Energy Manager Balance of Plant – See B/D/19/21075 Approver CS Energy Dam Safety – Approved for See B/D/19/21075 submission CleanCo Dam Safety – Approved for submission CleanCo Executive General Manager Transition - Approver 20/01/2020
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Document revision history
Version Date Prepared by Reason for change 1 19/01/2001 SunWater Initial Issue 2 20/02/2002 Revision of Pt 1, Pt 2, Pt 4 and Pt 6 3 26/03/2003 Notification list revised and formatted 4 08/04/2008 Document completely revised and various changes made 5 10/11/2010 Document revised and various changes made 6 20/12/2011 Document substantially revised to incorporate Qld Floods CS Energy Commission of Inquiry recommendations and to create Part 1 that contains Actions and Technical Data, and Part 2 that contains contact details only. 7 30/09/2013 SunWater Revised in accordance with amendments to the Water Supply (Safety and Reliability) Act 2008 and provisional guidelines for Emergency Action Planning for Referable Dams, June 2013 as issued by DEWS. [Incorporating Amendment No 1] 8 29/09/2017 SunWater Revised in accordance with amendments to the Water Supply Act 9 26/07/2019 GHD Document updated to incorporate dam hazard tables, activation triggers, communications plans and better align with the SunWater standard EAP. 9.1 28/11/19 CS Energy Minor updates to include change of ownership details. 10 21/01/20 CleanCo At the request of the Dam Safety Regulators office, a new version has been issued to more clearly identify the latest update to the EAP. Versions 9.1 and 10 comprise non- substantive changes, which primarily include the addition of CleanCo as the new Dam Owner, new contact details for CleanCo personnel roles within the EAP, a new figure for the Emergency Alert Polygon and corrections for minor formatting errors. 11 7/02/20 CleanCo Update the references and contact details for the CleanCo delegated EGMAM to , General Manager Asset Operations. Correct email addresses for the CEO and
12 27/02/20 CleanCo Somerset CEO and Local Disaster Coordinator contact details updated. 13 9/10/20 CleanCo Minor updates
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Controlled document distribution list
Copy Position Location no. 1 Site Manager Wivenhoe CleanCo, Wivenhoe Power Station 2 Civil Engineer - Asset Management CleanCo, Brisbane Office 3 Pool Trading Desk CleanCo, Brisbane Office 4 Director Dam Safety Department of Natural Resources, Mining and Energy, Brisbane 5 Local Disaster Coordinator – Local Disaster Management Somerset Regional Council, Esk Group (LDMG) 6 Officer in Charge Lowood Police Station 7 District Disaster Coordinator – Ipswich District Disaster Ipswich District Police Headquarters Management Group (DDMG) 8 Director Disaster Management Services State Disaster Coordination Centre – Queensland Fire and Emergency Services, Brisbane 9 CleanCo General Manager Asset Operations CleanCo, Brisbane Office Notes: Communication information for each ‘Controlled Copy Holder’ is attached in Appendix A
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1. References, abbreviations and definitions
1.1 References/associated documents
Ref. Document title Reference/location https://www.legislation.qld.gov.au/view/pdf/ A Water Supply (Safety and Reliability) Act 2008 2017-07-03/act-2008-034 Queensland Disaster Management Act 2003 https://www.legislation.qld.gov.au/view/pdf/i B nforce/current/act-2003-091 C Queensland Disaster Management Guidelines http://www.disaster.qld.gov.au Guidelines on Selection of Acceptable Flood ANCOLD D Capacity for Dams (ANCOLD, 2000) Queensland Dam Safety Management Guidelines https://www.dnrme.qld.gov.au/__data/assets E (DNRME 2002) /pdf_file/0007/78838/qnrm02013.pdf Australian Rainfall and Runoff (ARR) 2016 http://book.arr.org.au.s3-website-ap- F southeast-2.amazonaws.com/ Emergency action plan for referable dam guideline https://www.dnrme.qld.gov.au/__data/assets G (DNRME 2017) /pdf_file/0018/84015/eap-guideline.pdf Queensland State Disaster Management Plan 2016 Queensland-State-Disaster-Management-Plan H (Queensland’s Disaster Management Arrangements) Queensland Government arrangements for https://www.disaster.qld.gov.au/dmg/st/Doc I coordinating public information in a crisis uments/H1159-Public-Information-Crisis- Communication-Document.pdf Professional Engineers Act 2002 (RPEQ) https://www.legislation.qld.gov.au/view/pdf/i J nforce/2013-09-23/act-2002-054 Guidelines for the Development of Communication https://knowledge.aidr.org.au/media/1970/m Education, Awareness and Engagement Programs anual-45-guidelines-for-the-development-of- K (Australian Institute for Disaster Resilience 2002) communication-education-awareness-and- engagement-programs.pdf Queensland Emergency Alert Manual – M.1.174 https://www.disaster.qld.gov.au/dmg/st/Doc L uments/M1174-Queensland-Emergency- Alert-Manual.pdf Business Queensland—Map and list of emergency https://www.business.qld.gov.au/industries/ action plans for referable dams mining-energy-water/water/industry- M infrastructure/dams/emergency-action- plans/map N Procedure – REF - Crisis Management Plan REF Procedure – REF - Crisis Event Evaluation and REF O Escalation process P Splityard Creek Dam Safety Condition Schedule B/D/15/12897 Guidelines on Consequence Categories for Dams ANCOLD ISBN: 978-0-9808192-5-0 Q (ANCOLD, 2012)
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Guideline for Failure Impact Assessment of Water https://www.dews.qld.gov.au/__data/assets/ R Dams (DNRME 2018) pdf_file/0005/78836/guidelines-failure- impact-assessment.pdf CS Energy Splityard Creek Dam Failure Impact B/D/19/1591 S Assessment August 2017 CleanCo Splityard Creek Dam Comprehensive Risk Scheduled to be carried out in 2020 T Assessment Guidelines on Dam Safety Management (ANCOLD, ANCOLD ISBN: 0-731027620 U 2003) V CleanCo Inundation/Flooding of Public Roads Policy To be developed Queensland Rainfall and River Conditions (BOM- http://www.bom.gov.au/qld/flood/index.sht W Flood Warning) ml?ref=hdr X CleanCo Emergency Alert Protocol Appendix A Y SAP Incident Reporting & Management System SAP Procedure - WIV-MAN-13 - Incident Response W/D/12/1267 Z (Wivenhoe Power Station) Procedure - WIV-OPS-15 - High Rainfall High Dam W/D/11/111 AA Water Levels (Wivenhoe Power Station) Procedure - CS-TRAD-01 - Wivenhoe Power Station B/D/11/46292 BB Water Movement Notification to SEQWater (CS Energy) Procedure - WIV-COMMS-01 - Communications B/D/12/79098 CC Protocol with Seqwater - Water Movements (Splityard Creek Dam / Wivenhoe Dam) DD Standard Operating Procedures (Splityard Creek Dam) F/11/8636 (TRIM RM Folder) Water Act 2000 https://www.legislation.qld.gov.au/view/pdf/ EE 2017-07-03/act-2000-034 Manual - Operation and Maintenance (Splityard W/D/13/644 FF Creek Dam) Somerset Regional Council Local Disaster http://www.floodcommission.qld.gov.au/__d Management Plan v2 August 2009 ata/assets/pdf_file/0018/7713/QFCI_Exhibit_ GG 324_- _Somerset_Regional_Council_Local_Disaster_ Management_Plan.pdf Ipswich District Disaster Management Plan v1 https://www.police.qld.gov.au/RegionalPolici HH January 2019 ng/southern/Documents/IpswichDDMP.pdf
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1.2 Abbreviations and acronyms AEP Annual Exceedance Probability PMP Probable Maximum Precipitation AHD Australian Height Datum PMPDF Probable Maximum Precipitation AMTD Adopted Mean Thread Distance Design Flood ANCOLD Australian National Committee on PTD Physical Trading Desk Large Dams QDMC Queensland Disaster Management BOM Bureau of Meteorology Committee CE Civil Engineer QFES Queensland Fire & Emergency Services CEO Chief Executive Officer QPS Queensland Police Service CRA Comprehensive Risk Assessment RB Right Bank CSE CS Energy RDMG Relevant Disaster Management Group CSTN Counter Security & Terrorism Network RPEQ Registered Professional Engineer of D/S Downstream Queensland DCF Dam Crest Flood RSL Reduced Supply Level DCL Dam Crest Level SCTN Security & Counter Terrorism Network DDC District Disaster Coordinator SDCC State Disaster Coordination Centre DDMG District Disaster Management Group SDC State Disaster Coordinator DDMP District Disaster Management Plan SDCG State Disaster Coordination Group DDO Dam Duty Officer SDF Sunny Day Failure DDS Director Dam Safety SES State Emergency Service DNRME Department of Natural Resources, SMS Short Message Service Mines and Energy SO Standby Operator DSR Dam Safety Regulator SOP Standard Operating Procedure DSSP Dam Safety Services Provider SWL Storage Water Level DSTDM Dam Safety Technical Decision Maker U/S Upstream EAP Emergency Action Plan WHS Workplace Health & Safety EA Emergency Alert WQ Water Quality EER Emergency Event Report GMAO General Manager Asset Operations Wivenhoe Power Station EL Elevation Level HDO Hydro Duty Officer FCL Fixed Crest Level LEH Lead Engineer Hydro FSL Full Supply Level PS Production Supervisor IC Incident Coordinator SMW Site Manager Wivenhoe IFHC Incremental Flood Hazard Category WAM Wivenhoe Asset Management LB Left Bank WWE Wivenhoe Work Execution LDMG Local Disaster Management Group LDMP Local Disaster Management Plan Max. OL Maximum Operating Level HSEM Health Safety Environment Manager MM Modified Mercalli O&M Operation & Maintenance OB Observation Bore ORR Owners Regional Representative PAR Population at Risk PAM Portfolio Asset Manager PFRM Predictive Flood Routing Model PMF Probable Maximum Flood
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1.3 Business terms and definitions Terms used in this section have the meaning as set out in accordance with relevant legislation or as defined by operator requirements.
Term Definition Dam Hazard Means a reasonably foreseeable situation or condition that may: • cause or contribute to the failure of the dam, if the failure may cause harm to persons or property Dam Hazard Event Means an event arising from a dam hazard if: • persons or property may be harmed because of the event, AND • a coordinated response, involving the following relevant entities, is unlikely to be required; local group and district group for the EAP, local government chief executive, another entity the owner of the dam considers appropriate, AND • the event is not an emergency event. Disaster Management Of a district group or local government, means the group’s or local government’s Plan (DDMP or LDMP) disaster management plan under the Disaster Management Act 2003. District Group (DDMG) For an emergency action plan (EAP), means a district group established under the Disaster Management Act 2003, section 22 whose disaster district under that Act could, under the plan, be affected by a dam hazard. Emergency Event Means an event arising from a dam hazard if: • persons or property may be harmed because of the event, AND • any of the following apply: o a coordinated response, involving the following relevant entities, is likely to be required; local group and district group for the EAP, local government chief executive, another entity the owner of the dam considers appropriate, OR o the event may arise because of a disaster situation declared under the Disaster Management Act, OR o 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 Group (LDMG) For an EAP, means a local group established under the Disaster Management Act 2003, section 29 whose local government area could, under the plan, be affected by a dam hazard. Notice Response A dam owner’s written response to a notice following an assessment of an EAP by a local government or district group. Referable Dam A dam, or a proposed dam after its construction, will be a referable dam if: • a failure impact assessment of the dam, or the proposed dam, is carried out under the Act, AND • 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 • the chief executive has, under section 349 of the Act, accepted the assessment. Also, a dam is a referable dam if: • under section 342B of the Act, the owner of a dam is given a referable dam notice and, before the effective day for the notice, does not give the chief executive a failure impact assessment for the dam, AND
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Term Definition • the chief executive has not, under section 349 of the Act, accepted a failure impact assessment of the dam. Relevant Entity Means each of the following under the EAP for the dam: • 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, e.g. the owners of parcels of farm land adjacent to the dam or residents of a township • local group and district group for the EAP • local government whose local government area may be affected if a dam hazard event or emergency event were to happen • the chief executive • another entity the owner of the dam considers appropriate, e.g. the Queensland Police Service. Terms consistent with Queensland Disaster Management Arrangements (reference C) Activation Levels The four levels of EAP activation are: • Alert – A heightened level of vigilance due to the possibility of an event occurring. No further action may be required; however, the situation should be monitored by someone capable of assessing the potential of the threat. Moving to an Alert level indicates the dam owner is getting ready to activate the Lean Forward level of the EAP if the situation deteriorates. • Lean Forward – An operational state characterised by a heightened level of situational awareness of an impending disaster event and a state of operational readiness. Disaster coordination centres are on standby and prepared but not activated. • Stand Up – The operational state where resources are mobilised, personnel are activated, and operational activities commenced. Disaster coordination centres are activated. The dam owner needs to provide an ‘Emergency Event Report’ (EER) in accordance with the provision of the Act. • Stand Down – Transition from responding to an event back to normal core business and/or continuance of recovery operations. There is no longer a requirement to respond to the event and the threat is no longer present. Notes: The movement through these levels of activation is not necessarily sequential. It should be applied with flexibility and adaptability and be tailored to the location and event. Triggering one of these levels of activation may not necessarily mean a similar activation of the LDMG or DDMG. Dam Crest The lowest elevation of the non-overflow crest section of the dam excluding handrails, (reference D) parapets or wave walls that have not been designed to store water. Dam crest flood The lowest elevation of the non-overflow crest section of the dam excluding handrails, (reference D) parapets or wave walls that have not been designed to store water. Dam Failure Dam failure is the physical collapse of all or part of a dam or the uncontrolled release of any of its contents. Downstream releases Downstream releases are outflows from the dam made through appurtenant structures such as spillways or outlet works that are in accordance with the design of the dam.
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Term Definition
Earthquake A sudden release of energy in the Earth's crust or upper mantle, usually caused by movement along a fault plane or by volcanic activity, resulting in the generation of seismic waves that can be destructive. The potential consequences of an earthquake include: • settlement, sliding, or overturning of monoliths in the dam wall • initiation of seepage lines in the foundations or abutments that could lead to piping damage and potential inoperability of appurtenant works. Flood Release A flood release from a dam occurs when catchment inflows raise the storage level above the Full Supply Level (FSL) resulting in a discharge from the spillway of the dam. Piping Internal scour caused by the water flow and seepage that occurs through earth dams, dam foundations or dam abutments. The internal scour can lead to the formation of a pipe which can lead to a failure of the dam. Plane strike or other The impact of a plane, meteor or other high energy item on or in close vicinity of a impact dam could damage the dam structure or create a wave that could overtop the dam. Probable maximum The flood resulting from the probable maximum precipitation coupled with the worst flood (reference E) flood-producing catchment conditions that can be realistically expected in the prevailing meteorological conditions. Probable maximum The theoretical greatest depth of precipitation for a given duration that is physically precipitation possible over a particular drainage basin. (reference E) Probable maximum The flood resulting from the probable maximum precipitation coupled with typical precipitation design catchment conditions. flood (reference F) Stability, main High foundation pore pressure peaks may reduce the Factor of Safety against slip embankment dam circle failure to an unacceptable level. ‘Sunny day’ failure A failure that occurs at the FSL and there is no concurrent rain associated flooding. (SDF) Terrorist activity A deliberate attempt to damage, fail or contaminate a dam.
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2. Introduction
2.1 Context Under the Water Supply (Safety and Reliability) Act 2008 (the Act), the owner of a referable dam must have an approved EAP for the dam. Referable dams, by definition, would put lives at risk if they were to fail. This EAP has been prepared in accordance with Chapter 4 of the Act. The content requirements for EAPs are contained in section 352H of the Act.
Summary of legal requirements – Section 352H Section 352H(1) of the Act requires that the EAP must identify each dam hazard for the dam ; and for each of these dam hazard types (e.g., flood operations, or chemical spill/toxic conditions): 1. identify the area likely to be affected by a dam hazard event or emergency event arising from the dam hazard; and 2. identify each circumstance that indicates a material increase in the likelihood of the dam hazard event or emergency event happening; and 3. state when and how the owner of the dam plans to warn persons who may be harmed, or whose property may be harmed by an event caused by the dam hazard, if one happens, and/or there is a material increase in the likelihood of an occurrence, including the order of priority in which the persons or categories of persons are to be warned; and 4. state when and how the owner plans to notify the relevant entities for the dam, if a dam hazard event or emergency event happens or, there is a material increase in the likelihood of such an occurrence, including the order of priority in which the relevant entities are to be notified; and 5. state the actions the owner of the dam plans to take in response to a dam hazard event or emergency event. In accordance with section 352H(2) of the Act, the EAP may provide for the dam owner to make arrangements with a relevant entity for warnings to be given by the relevant entity on behalf of the dam owner in appropriate circumstances. Section 352HA of the Act states that before giving the chief executive an EAP, the owner of the dam must give a copy of the plan to each local government whose area may be affected by a dam hazard identified in the plan; and each district group for the plan. Section 352HB of the Act states that the local government must assess the EAP for consistency with its disaster management plan. In its assessment, the local government must consult with the local district group for the plan. Within 30 business days of receiving the EAP, the local government must give the owner of the dam a notice, which states whether it considers the plan is consistent with its disaster management plan; and if not, give reason why it considers the EAP is not consistent. The EAP must include any such notices, provided to the owner of the dam by a local government (or district group); and any responses which the owner gives to these notices. Section 352H(1) further stipulates that an EAP must include any other relevant matter prescribed by regulation. The local government whose area may be affected by a dam hazard for Splityard Creek Dam has been determined as Somerset Regional Council. CS Energy has provided the Somerset Regional Council with a copy of the draft EAP for assessment. Section 352HC of the Act states that a district group may review the EAP for consistency with its disaster management plan. The district group for Splityard Creek Dam is Ipswich DDMG. CS Energy has provided the
DDMG with a copy of the draft EAP for review.
Note: CS Energy has attempted to write the EAP to cope with all reasonably foreseeable emergencies. However, there is considerable uncertainty about how any emergency might develop and progress. Factors such as the weather, the location, the mechanics, and the rate and size of any actual failure can considerably affect any resulting flood discharges. Therefore, a significant number of assumptions have had to be made in compiling sections of the EAP. Some variation in outcome should be expected where the event differs from the assumed behaviour.
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2.2 Purpose The purpose of this EAP is - • to minimise the risk of harm to persons or property if a dam hazard event or emergency event for the dam happens • to identify dam hazards that could occur at Splityard Creek Dam and the area likely to be affected for each hazard • to prescribe emergency actions taken by the dam owners and operating personnel in identifying and responding to dam hazards and notifying relevant entities. It is possible for more than one dam hazard to exist at Splityard Creek Dam at the same time. In such a circumstance, it may be necessary to act on the procedures within separate sections simultaneously. The focus of this EAP is the management of dam hazards at Splityard Creek Dam by the owner of the dam and the communication and notification of dam hazards to the LDMG, DDMG and broader community. However, the EAP sits within the broader emergency response framework. This EAP has been assessed and considered to be consistent with a future inclusion in the Somerset LDMP.
2.3 Scope The Splityard Creek Dam EAP covers - • dam hazards evaluated within CleanCo’s Dam Safety Management Program • details about the dam that are relevant to a dam hazard • identification of circumstances that indicates a material increase in the likelihood of a dam hazard event or emergency event • triggers for activation of a tiered response to a dam hazard event or emergency event • roles and responsibilities in responding to a dam hazard event or emergency event • notification, warning, and communication protocols • inspection, monitoring, and reporting protocols during emergencies (reference I) • other relevant information that may assist with identifying the area affected by a dam hazard event or emergency event
2.4 CleanCo provides training Training of the use and implementation of this EAP document is carried out at various times throughout the year, but specific pre-wet season training is undertaken at Wivenhoe Power Station (or convenient location of stakeholders, i.e. Fernvale) in the months leading up to the wet season. EAP training that is carried out on-site includes walkthroughs of new changes, scenario (role play) and Q & A to check the knowledge and competency of all those who attended. This on-site training is presented to relevant CleanCo staff (DDOs and ICs) and disaster management stakeholders. DSTDM information sessions are carried out once a year with the same walkthrough of new changes and Q & A. New employees for EAP various roles will also have a walkthrough of the EAP to understand soon after commencing work with CleanCo. EAP training includes walkthroughs of new changes, scenario (role play) and Q & A to check the knowledge and competency of all those who attended. This training is presented to relevant CleanCo staff (DDOs and ICs) and disaster management stakeholders. DSTDM information sessions are carried out once a year with the same walkthrough of new changes and Q & A for the Dam. New employees to the EAP various roles will have a walkthrough and training on the EAP soon after they start work at CleanCo. CleanCo is also working towards carrying out an EAP exercise annually involving each local authority and disaster management stakeholders. This exercise would involve the SDCC and include the (non-live) testing of Emergency Alerts.
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2.5 Dam emergency organisation within CleanCo The CleanCo emergency management framework generally utilises the organisation’s hierarchy and in-house experts as illustrated in Figure 1 below. Figure 1: CleanCo emergency response organisation
Key aspects of the emergency management framework are: • Central to the framework is the role of IC for any dam hazard at a dam. The IC will maintain overall responsibility for a coordinated response to the dam hazard incident. • The IC is responsible for activating the EAP when the dam reaches an EAP activation level, unless instructed to activate by the DSTDM who has determined that it is reasonable likely that the dam could reach an EAP activation level. Should the IC be unavailable, the DDO is responsible for the activation. If the IC loses all communications during a dam hazard, then as a fail-safe position, the DDO will assume the duties and responsibilities of the IC. However, loss of communications could result in some communication processes defined in this EAP not being carried out. • CleanCo and/or its DSSP (includes DSTDM) and technical staff will provide technical advice to the IC and DDO on an as needs basis. The DSTDM will also make flood and dam engineering decisions during a dam hazard. These roles are filled by RPEQs (or by experienced engineers under the direct supervision of an RPEQ) and are suitably qualified professionals as defined in reference J. Such advice will be provided within an established framework of SOPs, models, standards and manuals.
2.6 Community information Applying reference K, CleanCo with the assistance of the local council will ensure community education around messaging and impacts of the EAP and its related events is undertaken and continually improved by incorporating actions from lessons learnt (Section 2.7).
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CleanCo provides information externally to customers, D/S residents and the community in a range of methods or channels in relation to Dam hazards and Emergencies. In future, individuals may be able to access information through Facebook, Twitter and the CleanCo web page. Immediately D/S residents are also provided information in text message/phone calls in the event of an activation of this EAP. In the event of an emergency event or when otherwise required, CleanCo and the affected Local Government will use the National Emergency Alert System to send a voice message and SMS in accordance with reference L. This service is provided by Telstra and managed by QFES at the SDCC. A copy of the CleanCo approved EAP is available to the public on the Business Queensland website, reference M. These copies are redacted to protect people’s personal details.
2.7 Lessons Learnt CleanCo will carry out Lessons Learnt workshops as part of its post event management. These Lessons Learnt can result in changes to the EAP. These will be captured and, if applicable to this document, will be implemented at the earliest opportunity and are made available in the next EAP update to the DSR as part of CleanCo’s continual improvement of its EAPs. The Lessons Learnt actions, if relevant, will be provided to stakeholders, such as the LDMG, DDMG, other dam owners and DNRME as appropriate. In addition, CleanCo requests any post event learnings be communicated regarding operational effectiveness and areas for improvement.
2.8 Downstream notification lists CleanCo has compiled the notification lists through an iterative process. At least annually, CleanCo confirms contact details for all landholders that are impacted in the downstream zones.
2.9 Comprehensive Risk Assessments A Comprehensive Risk Assessments (CRA) will be carried out on Splityard Creek Dam in the near future. This is a technical report that is utilised to ascertain risks for the dam as the basis for emergency triggers. The CRA will be made available to disaster management personnel whom require further assurance around the findings. To obtain a copy of a relevant CRA a request should be made in writing to CleanCo General Manager Asset Operations. It should detail the reason for the request and indicate who will be interpreting the data, i.e. engineering capability, for any unqualified personnel.
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3. Roles and responsibilities
Roles and responsibilities Position holder 3
Owner • Liaise with the Board and Minister CEO • Activate CleanCo Crisis Management Plan (reference N), if required GMAO • Ensure necessary resources are available to manage any event SMW • Maintain an up to date list of immediately D/S residents (Appendix A4 and Appendix A5) of Splityard Creek Dam. The flood extent is indicated in the drawing in Appendix A7 • At all times, aim to provide timely advice and support to the LDMG in the affected local government area and the DDMG in the affected disaster district • During a dam hazard event that occurs with little or no warning, undertake the following actions to ensure the community is informed as soon as possible: o notify the residents listed in Appendix A4 and Appendix A5 via SMS o contact SDCC Watch Desk to request an Emergency Alert campaign throughout the Splityard Creek Dam Emergency polygon o During a dam hazard event that occurs with adequate warning; notify the residents listed in Appendix A4 and Appendix A5 via SMS, unless otherwise agreed with the LDMG • Record communications, notifications and observations as required Owner’s Head Office Representative • Authorise the issuing of EAP, SOPs and O&M Manual and Amendments PAM • Facilitate Dam Safety Training Courses for CleanCo dam operations staff and other staff CE as appropriate, and ensure that all staff required to undertake Dam Safety work are trained and accredited • Ensure that risks identified in the CRA or other technical reports undertaken in relation to Dam Safety are Included in the EAP • Ensure visual inspections and instrumentation monitoring frequencies conform to ANCOLD Guidelines • Ensure all Dam Safety work orders, work instructions and lesson learned outcomes are fully implemented • Ensure requirements of the Dam Condition Schedule (reference P) are met • Ensure the work instructions are correct and the Log Books, SOPs, Data Books, and EAPs are reviewed annually as per reference P • Ensure the 5 yearly Comprehensive Inspections and their Reports are completed by suitably qualified personnel within the time specified in reference P and that work orders are created for recommendations and work is undertaken as required • Ensure Annual Inspections and their reports are completed by suitably qualified personnel within the time frames specified in reference P and that work orders are created for recommendations and work is undertaken as required • Ensure the Dam Safety Instrumentation Data is reviewed and evaluated by suitably qualified personnel to verify the structural integrity of the dams on a regular basis and maintain a spread sheet for verification for audit and quality control
3 May be undertaken by one person, or jointly between the following personnel, depending on availability and/or emergency event
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Roles and responsibilities Position holder 3 • Record communications, notifications and observations as required Owners Regional Representative (ORR) • Liaise with the Lead Engineer Hydro and Production Supervisor, WAM, WWE SMW • Arrange dam specific training and accreditation for relevant staff LEH • Ensure competent, trained and accredited personnel operate the storages PS • Undertake the role of IC as required: o Liaise with the Local Disaster Coordinator or proxy o Activate the EAP, when necessary o Ensure the EAP is implemented appropriately and carry out the IC role as required • Ensure all work orders, work instructions and lesson learned outcomes are fully implemented. • Record communications, notifications and observations as required Dam Safety Technical Decision Maker (DSTDM) • Analyse the situation and provide expert technical advice in relation to Dam Safety Various personnel • Discuss Dam Hazard with peers and other technical experts and make sound decisions as per DSTDM to mitigate the risk roster • Determine response to incidents and emerging issues • Issue warning on dam failure and advise on protective measures • Ensure the EAP is implemented appropriately and carry out the DSTDM role as required • Liaise with DSR as required • Record communications, notifications and observations as required CleanCo Media Team • Analyse sensitive issues, discuss with the Owner and issue media releases Various personnel • Handle public and customer comments (including social media) and advise the Owner as per Media if necessary Team roster • Liaise with the IC and update QDMC of flood events • Record communications, notifications and observations as required Incident Coordinator (IC) • Notify LDMGs, or councils if LDMGs not Stood Up, of intent to use the Emergency Alert SMW (EA) LEH • Activate the EAP, when necessary PS • Ensure the EAP is implemented appropriately and carry out the IC role as required • Arrange Situation Reports and determine frequency, as required • Record communications, notifications and observations as required Dam Duty Officer (DDO) • Complete accreditation to operate and maintain relevant storage Various personnel • Ensure the EAP is implemented appropriately and carry out the DDO role as required as per DDO roster • Take direction from the DSTDM and IC as requested • Arrange immediate site inspection and make informed assessment of the situation
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Roles and responsibilities Position holder 3 • Escalate any issue not covered in the EAP or where actions are not clear • Record communications, notifications and observations as required Council Councils have legislated local government functions, as per Section 80 of reference B. Somerset These include: Regional Council • Ensure it has a disaster response capability • Approve its local disaster management plan • Ensure information about an event or a disaster in its area is promptly given to the DDMG for the disaster district in which area it is situated • Perform other functions given to the local government under reference B Queensland Police Service (QPS) Manage the initial situation based on local operational procedures; including but not Local Police limited to: • Conduct emergency operations • Coordinate and support CleanCo during a declared emergency at the dam • Liaise with relevant organisations • Evacuation of persons if required • Control of essential traffic • Security of specific area Disaster Management Groups/Personnel – (In addition to requirements outlined in reference B) LDMG LDMG QFES • As per IGEM review recommendation; work together with CleanCo and the Council to DDMG ensure community education around messaging and impacts of EAP related events is undertaken and continually improves • Work with the Council and CleanCo to ensure the EAP is regularly exercised • Identify and coordinate the use of resources and support services that may be required for an EAP event, noting that for safety events unique to the dam, CleanCo will approach councils to initiate • During a dam hazard event, providing they are Stood Up, the LDMG in the affected local government area will take the lead role in notifying the broader community • Identify and provide advice to the relevant DDMG about support services required by the LDMG to manage an EAP event • Provide reports and make recommendations to the relevant DDMG about matters relating to EAP events QFES • Work with dam owner and LDMG to ensure Emergency Alert polygons are prepared, stored and tested at the State Watch Desk And as per Section 352HC of the Act: DDMG • May review the EAP for consistency with the DDMP
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Roles and responsibilities Position holder 3 Dam Safety Regulator (DSR) • Liaison with relevant Minister on necessary actions DSR • Approve this document as required under legislation • Liaise with chief executive as required in administering (regulating) the Act
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4. Dam details
4.1 General dam information Location: Splityard Creek Dam is located approximately 70 km northwest of Brisbane on the Pryde Creek at a distance of 8.6 km upstream from the confluence of Pryde Creek and the Brisbane River. Purpose: Splityard Creek Dam is owned and operated by CleanCo but was previously owned and operated by CS Energy. It is the upper storage pond for a pumped storage hydroelectric facility. Catchment: The catchment and upstream geography is only 3.6 km2 and is stable. Annual average rainfall is 1050 mm. Special consideration of upstream areas is not required. Construction: The earth and rockfill dam was constructed in 1983 as an off-stream storage. A small saddle dam is located on the northern side of the reservoir rim. Specification: Table 2 below lists general specifications of Splityard Creek Dam. Table 2: Splityard Creek Dam specifications Description Specification Dam type Zoned earth and rockfill embankment with central clay core Full Supply Level (FSL) EL 166.5 m Design Operating Range EL 133 m – EL 166.5 m Dam Crest Level (DCL) EL 168.0 m Storage capacity at FSL 28,700 ML Storage area (at FSL) 104 ha Maximum embankment height 76 m Total length 1,120 m Spillway type Open trapezoidal channel with a 1.0 m high concrete sill wall control structure Spillway crest level EL 166.5 m Spillway crest width 190.4 m Spillway Capacity at PMF (EL 167.6 m) 420 m3/s Outlet works 28 m high intake tower with 900 mm MSCL outlet pipe housed in a reinforced concrete outlet conduit Outlet control 450 mm & 200 mm butterfly valves housed in the valve house at the toe of main embankment Minimum draw down level through outlet EL 108.5 m works Saddle Dam type Zoned earth and rockfill embankment with central clay core Saddle Dam Crest Level EL 168.0 M Saddle Dam length 159 m Saddle Dam maximum height 10 m
All levels are to Australian Height Datum, AHD. Conversion from State Datum is AHD (in metres) = State Datum RL (in feet) x 0.3048 - 0.03 m
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4.2 Population at risk In accordance with references Q, R and S: • Splityard Creek Dam has a Category 1 Failure Impact Rating • the estimated maximum PAR for a Sunny Day Failure (SDF) of Splityard Creek Dam is 47
4.3 Spillway adequacy and reservoir water releases The spillway is not located near the dam wall. Water released via the spillway would only occur, if the hydroelectric power station control system failed to stop the pumps, or in an extreme rainfall event when water is not released through the Hydro Power Station. In these events, released water would be discharged into a gully that flows via Branch Creek into Wivenhoe Lake, not into the original watercourse. There is a road bridge and property along Branch Creek. However, a preliminary assessment indicated that the waterway area below the bridge contains adequate capacity to pass any discharge from the spillway, either by a Power Station pumping control failure or an extreme rainfall event. There are no buildings close to the waterway of Branch Creek; therefore, there is no population at risk (PAR) for spillway discharge only. Normal releases of water from the dam are through the power station into Wivenhoe Lake, not down the original watercourse. The outlet works consist of a 28 m high intake tower with a 900 mm MSCL outlet pipe housed in a reinforced concrete outlet conduit, which passes through the main embankment dam. Water released via the outlet works discharge pipe is not considered to constitute a credible hazard downstream, as the flow level in Pryde Creek would be only marginally increased.
4.4 General arrangement An aerial survey view of the dam is included in Figure 2. The general arrangement and other drawings are in Appendix E. Figure 2 Plan of the Splityard Creek Dam
Spillway
Saddle dam
Splityard Creek Dam storage
Wivenhoe Dam storage
Main dam Wivenhoe Hydro Power Station
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4.5 Emergency inspections and monitoring The Splityard Creek Dam has been designed to conform to modern design standards, so that its failure is highly unlikely. To maintain the dam in a safe condition and detect any dam hazard, as soon as it begins to develop, or becomes apparent, the following is applicable to the Dam. 4.5.1 Inspections • Routine Visual Inspection: Conducted as per reference FF or as directed by the DSTDM • Detailed Inspection: Conducted annually • Comprehensive Inspection: Conducted 5-yearly 4.5.2 Instrumentation and monitoring To confirm the structural behaviour and safety of the embankment, the following Instrumentation was installed, and is monitored, at Splityard Creek Dam: • Water Level and seepage measurement o 39 hydraulic piezometers to monitor pressure distribution through the embankment dam and its foundations. o 47 groundwater observation bores to monitor for any variations in the level of the phreatic surface. o 9 measuring weirs to monitor seepage from the embankment foundations and other parts of the dam. • Settlement/movement measurement o 35 movement points used to monitor the embankment surface both vertically (Z direction) and horizontally (X and Y directions). o 4 inclinometers to monitor any movement within the embankment dam and/or its foundation. o 8 extensometers installed in the core of the embankment where the axis deflects 37 degrees upstream and passes over a high knob in the topography. The purpose of these extensometers was to detect any movement of the embankment downstream, as well any transverse cracking caused by differential settlement of the embankment across the knob. The location of instrumentation and monitoring equipment is in the drawing in Appendix E.
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5. Dam hazard – Piping: embankment, foundation or abutments
5.1 Overview The emergency action described in this section relates to a potential dam failure hazard due to a piping condition through the main embankment dam, foundations or abutments. An early indicator of a piping condition can be an increase in seepage or a new area of seepage. If the seepage water is cloudy or has become cloudy this may indicate that material is being transported and a pipe is being established. If a pipe is established and progresses, then a dam failure may result. If a potential pipe is detected early remedial repairs maybe possible in the form of constructing a filter and weighting zone over the pipe exit if safe to do so. The area likely to be affected by this emergency event is described as: • if dam failure does not occur then there will not be any area affected • if dam failure does occur then the maximum area affected area is the level shown by the Sunny Day Failure (SDF) line on the maps in Appendix B.
5.2 Emergency Actions Table 3 to Table 6 specify emergency actions for the following roles: • DDO • IC • DSTDM
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Figure 3: Dam hazard - Piping: embankment, foundation or abutments flowchart
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Table 3: Piping: Embankment, foundation or abutments – DDO emergency action
Activation level Alert Lean Forward Stand Up 1 Stand Up 2 Stand Down Activation trigger • Increasing leakage through dam • Increasing leakage through an • Piping condition has been • Failure in progress or likely due to • Risk assessment has determined embankment, foundations, embankment, the foundations, established piping, and that piping risk has reduced abutments, v-notches and/or any abutments, v-notches and/or any new • Sufficient water in storage to create new area area with cloudy water a dam failure hazard • EAP activated Actions • Monitor and record flows every 6 • As per previous activation level, plus: • As per previous activation level, • As per previous activation level, • Forward information for EER to IC hours (or as otherwise instructed • Complete and send the Inspection plus: plus: • Log Book is to be updated by the DSTDM) until a decreasing Sheet to DSTDM following each • Support/supervise remedial works • Vacate the immediate vicinity of the • Return to routine activities trend is observable or as directed inspection as required, if safe to do so piping condition by the IC • Instruct others to lower the storage, • Instruct others to lower the storage, • Liaise with the DSTDM following if directed or considered necessary if not already instructed each inspection • Consider closing any affected roads, • Liaise with IC and DSTDM re • Maintain photographic record and if not already closed by others potential for evacuations send to DSTDM following each inspection • Notify SO • Log Book entry
Internal • DSTDM • As per previous activation level • As per previous activation level • As per previous activation level • As required Notifications • IC • SO External • Nil • Nil • Nil • Nil • Nil Notifications
ALL ACTION MUST BE TAKEN WHEN IT IS SAFE TO DO SO eg taking photographs/video, dam inspections, instrument readings. ALL PHOTOS MUST BE DATE STAMPED
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Table 4: Piping: Embankment, foundation or abutments – IC emergency action
Activation level Alert Lean Forward Stand Up 1 Stand Up 2 Stand Down Activation • Increasing leakage through dam • Increasing leakage through an • Piping condition has been • Failure in progress or likely due to • Risk assessment has determined trigger embankment, foundations, embankment, the foundations, established piping, and that piping risk has reduced abutments, v-notches and/or any abutments, v-notches and/or any • Sufficient water in storage to create new area new area with cloudy water a dam failure hazard • EAP activated Actions • Liaise with DDO and DSTDM re • As per pervious activation level, • As per previous activation level, plus • As per previous activation level, plus • Deactivate EAP situation plus: • Mobilise resources to undertake • Liaise with DDO, DSTDM, Police • Compile EER and organise delivery • Activate EAP remedial works, if directed by and LDMG re potential for to the Regulator within 30 days of the • Liaise with the Police and LDMG re DSTDM evacuations completion of the event situation • Liaise with Police and LDMG • Complete Situation Report (final) • Investigate availability of machinery regarding potential road/bridge • Return to routine activities and materials (if insufficient closures, if directed by DSTDM stockpiles available) • Send D/S Residents landline voice • Place machinery operators on and SMS messages standby if directed by DSTDM • Complete Emergency Alert Request • Complete Situation Report, unless Form and send to SDCC Watch otherwise directed Desk • Complete Incident and Near Miss • Follow up with phone call to SDCC Alert to ask that Splityard Creek Dam Emergency Polygon is activated
Internal • DDO • As per previous activation level, plus • As per previous activation level • As per previous activation level • Inform previous notifications of EAP Notifications • DSTDM • Incident and Near Miss Alert deactivation and stand down • CleanCo Communications Team External • As required • Police • As per previous activation level, plus • As per previous activation level • Inform previous notifications of EAP Notifications • LDMG • SDCC Watch Desk deactivation and stand down • D/S Residents
ALL ACTION MUST BE TAKEN WHEN IT IS SAFE TO DO SO eg taking photographs/video, dam inspections, instrument readings. ALL PHOTOS MUST BE DATE STAMPED
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Table 5: Piping: Embankment, foundation or abutments – IC external communication plan
Activation Trigger for communications Group to contact Method Message Message text level code • Increasing leakage through dam Internal communications only Alert embankment, foundations, abutments, v- notches and/or any new area • Increasing leakage through an 1. Police Phone & Piping 1 Describe current situation with Dam: embankment, the foundations or 2. LDMG Email What is the event (Dam safety risk - piping) abutments v-notches and/or any new What is the status (Unconfirmed piping/leakage – Investigation continues) area with cloudy water Advise EAP has been activated • EAP activated Advise current storage level Advise any issues you are aware of Lean Police and LDMG to standby for further advice Forward Incident and Near Miss Alert SAP System Splityard Creek Dam – Unconfirmed piping risk • Weekly update (if applicable) 1. Police Email Piping 1 CLEANCO EMERGENCY NOTIFICATION 2. LDMG DAM: SPLITYARD CREEK EVENT: DAM SAFETY RISK – PIPING STATUS: UNCONFIRMED PIPING / LEAKAGE – INVESTIGATION CONTINUES STORAGE WATER LEVEL: XXXX.XX m AHD ACTION: Standby for further advice • Piping condition has been established 1. D/S Residents Landline Piping 2 CLEANCO EMERGENCY NOTIFICATION Voice DAM: SPLITYARD CREEK Message & EVENT: DAM SAFETY RISK – PIPING SMS STATUS: CONFIRMED PIPING/LEAKAGE ACTION: POSSIBLE ISSUE AT DAM, LISTEN FOR FURTHER ADVICE • 2. Police Phone & Piping 2 Describe current situation with Dam: 3. LDMG Email What is the event (Dam safety risk - piping) Stand Up 1 What is the status (Confirmed piping/leakage) Advise current storage level and discuss any road/bridge closures Advise any issues you are aware of LDMG and Police to prepare for possible evacuations 4. SDCC Watch Desk Email & Piping 2 Complete Emergency Alert Request Form and send to SDCC Watch Desk Phone Follow up with phone call to ask that Splityard Creek Dam Emergency Polygon is activated Message as shown above for D/S Residents Incident and Near Miss Alert SAP System Splityard Creek Dam – Piping established. Failure possible but not in progress
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Table 5: Piping: Embankment, foundation or abutments – IC external communication plan
Activation Trigger for communications Group to contact Method Message Message text level code • Failure likely due to piping, and 1. D/S Residents Landline Piping 3 CLEANCO EMERGENCY NOTIFICATION – URGENT Voice • Sufficient water in storage to create a DAM: SPLITYARD CREEK Message & dam failure hazard SMS EVENT: DAM SAFETY RISK – PIPING STATUS: DAM FAILURE LIKELY ACTION: POSSIBLE EVACUATION, FOLLOW INSTRUCTIONS OF EMERGENCY SERVICES
2. Police Phone Piping 3 Describe current situation with Dam: 3. LDMG What is the event (Dam safety risk - piping) What is the status (Possible dam failure) Advise current storage level and discuss any road/bridge closures LDMG and Police to prepare coordinated evacuations
4. SDCC Watch Desk Email & Piping 3 Complete Emergency Alert Request Form and send to SDCC Watch Desk Phone Follow up with phone call to ask that Splityard Creek Dam Emergency Polygon is activated Message as shown above for D/S Residents
Stand Up 2 Incident and Near Miss Alert SAP System Splityard Creek Dam – Piping failure likely
• Dam failure in progress, and 1. D/S Residents Landline Piping 4 CLEANCO EMERGENCY NOTIFICATION – URGENT Voice • Sufficient water in storage to create a DAM: SPLITYARD CREEK Message & dam failure hazard SMS EVENT: DAM SAFETY RISK – PIPING STATUS: DAM FAILURE IN PROGRESS ACTION: MOVE TO HIGHER GROUND
2. Police Phone Piping 4 Describe current situation with Dam: 3. LDMG What is the event (Dam safety risk - piping) What is the status (Dam failure in progress) Advise current storage level LDMG and Police to coordinate evacuations of affected Downstream Residents
4. SDCC Watch Desk Email & Piping 4 Complete Emergency Alert Request Form in and send to SDCC Watch Desk Phone Follow up with phone call to ask that Splityard Creek Dam Emergency Polygon is activated Message as shown above for D/S Residents
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Table 5: Piping: Embankment, foundation or abutments – IC external communication plan
Activation Trigger for communications Group to contact Method Message Message text level code Incident and Near Miss Alert SAP System Splityard Creek Dam – Piping failure in progress
• Risk assessment has determined that 1. D/S Residents (If from Landline Piping 5 CLEANCO EMERGENCY NOTIFICATION piping risk has reduced Stand Up) Voice DAM: SPLITYARD CREEK Message & SMS EVENT: DAM SAFETY RISK - PIPING STATUS: EMERGENCY CONDITION STOOD DOWN Stand ACTION: NONE Down 2. Police Phone & Piping 5 Describe current situation with Dam: 3. LDMG Email What is the event (Dam safety risk - piping). What is the status (Emergency condition stood down) Advise risk assessment has determined that piping risk has reduced and EAP has been deactivated.
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Table 6: Piping: Embankment, foundation or abutments –DSTDM emergency action
Activation level Alert Lean Forward Stand Up 1 Stand Up 2 Stand Down Activation trigger • Increasing leakage through dam • Increasing leakage through an • Piping condition has been • Failure in progress or likely due to • Risk assessment has determined embankment, foundations, embankment, the foundations, established piping, and that piping risk has reduced abutments, v-notches and/or any abutments, v-notches and/or any • Sufficient water in storage to create new area new area with cloudy water a dam failure hazard • EAP activated Action • Arrange an inspection of the dam • As per previous activation level, • As per previous activation level, • As per previous activation level, plus: • Forward information for EER to IC and assess its condition as soon as plus: plus: • Liaise with DDO and advise the IC • Return to routine activities possible, when safe to do so. • Advise IC on potential machinery • Assess risk and determine if failure on need to recommend evacuations • Determine if piping condition has and materials that may be required likely or in progress been established to affect repairs • Determine if risks can be reduced • Liaise with DDO and IC by lowering storage and advise • Monitor situation and assess risks DDO • Determine if remedial repairs are practical and advise DDO and IC • Supervise* remedial repairs (if applicable) • Liaise with IC regarding road/bridge closures Internal • DDO • As per previous activation level • As per previous activation level, • As per previous activation level, plus: • As required Notifications • IC plus: • CleanCo Crisis Management Team External • Nil • Dam Safety Regulator • As per previous activation level • As per previous activation level • As required Notifications
* Supervise means provide technical oversight to the work. It does not necessarily mean onsite supervision.
ALL ACTION MUST BE TAKEN WHEN IT IS SAFE TO DO SO eg taking photographs/video, dam inspections, instrument readings. ALL PHOTOS MUST BE DATE STAMPED
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6. Dam hazard – Earthquake
6.1 Overview The emergency action described in this section relates to a potential dam failure hazard due to an earthquake causing damage to the main embankment dam, foundations or abutments. Damage could take the form of cracking or slumping of the embankment, deformation or landslip or increased seepage. If damage does occur then a dam failure may result. If damage is detected early, remedial repairs may be possible depending on the nature of the damage. The area likely to be affected by this emergency event is described as: • If dam failure does not occur then there will not be any area affected • If dam failure does occur then the maximum area affected area is the level shown by the SDF line on the maps in Appendix B.
6.2 Emergency Actions Table 7 to Table 10 specify emergency actions for the following roles: • DDO • IC • DSTDM
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Figure 4: Dam hazard - Earthquake flowchart
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Table 7: Earthquake – DDO emergency action
Activation level Alert Lean Forward Stand Up 1 Stand Up 2 Stand Down
Activation • Earthquake reported or felt in the • Earthquake reported or felt in the area • Earthquake reported or felt in the area, • Failure in progress or likely due to • No change detected or no damage trigger area and earthquake, and found during the inspections, or • Intensity greater than or equal to 5 MM, • Intensity less than 5 MM (using or • A possible failure path has been • Sufficient water in storage to create a • Risk assessment has determined that Modified Mercalli Scale) identified dam failure hazard failure risk has reduced to an • Intensity less than 5 MM and change acceptable level detected during surveillance inspection •Repairs completed as necessary • EAP activated Actions • Inspect the Dam wall, spillway • As per previous activation level, plus • As per previous activation level, plus • As per previous activation level, plus • Forward information for EER to IC structure, and abutments in daylight • Immediately inspect the Dam wall, • Support/supervise remedial works as • Vacate the immediate vicinity of the • Log Book is to be updated hours (if safe to do so) spillway structure, and abutments using required, if safe to do so earthquake condition • Return to routine activities •Check for leaks, deformation, torches if required (if safe to do so) • Instruct others to lower the storage if • Instruct others to lower the storage, if erosion, and concrete damage • Repeat the inspection as directed directed or considered necessary not already instructed •Liaise with the DSTDM following the • Complete and send the Inspection Sheet • Consider closing any affected roads, if • Liaise with IC and DSTDM re potential inspection to DSTDM following each inspection not already closed by others for evacuations • Maintain photographic record and send to DSTDM following the inspection • Notify SO • Log Book entry Internal • DSTDM • As per previous activation level • As per previous activation level • As per previous activation level • As required Notifications • IC • SO External • Nil • Nil • Nil • Nil • Nil Notifications
ALL ACTION MUST BE TAKEN WHEN IT IS SAFE TO DO SO eg taking photographs/video, dam inspections, instrument readings. ALL PHOTOS MUST BE DATE STAMPED
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Table 8: Earthquake – IC emergency action
Activation level Alert Lean Forward Stand Up 1 Stand Up 2 Stand Down
Activation • Earthquake reported or felt in the • Earthquake reported or felt in the area • Earthquake reported or felt in the • Failure in progress or likely due to • No change detected or no damage trigger area area, and earthquake, and found during the inspections, or • Intensity greater than or equal to 5 MM, • Intensity less than 5 MM (using or • A possible failure path has been • Sufficient water in storage to create • Risk assessment has determined Modified Mercalli Scale identified a dam failure hazard that failure risk has reduced to an • Intensity less than 5 MM and change acceptable level detected during surveillance inspection •Repairs completed as necessary • EAP activated Actions • Liaise with DDO and DSTDM re • As per pervious activation level, plus: • As per pervious activation level, • As per pervious activation level, • Deactivate EAP situation plus: plus: • Activate EAP • Compile EER and organise delivery •Mobilise resources to undertake •Liaise with DDO, DSTDM, Police to the Regulator within 30 days of • Liaise with Police and LDMG re remedial works, if directed by and LDMG re potential for the completion of the event situation DSTDM evacuations •Complete Situation Report (final) • Investigate availability of machinery and •Liaise with Police and LDMG materials (if insufficient stockpiles • Return to routine activities regarding potential road / bridge available) closures, if directed by DSTDM • Place machinery operators on standby •Send D/S Residents landline voice if directed by DSTDM and SMS messages • Complete Situation Report, unless •Complete Emergency Alert Request otherwise directed Form and send to SDCC Watch • Complete Incident and Near Miss Alert Desk • Follow up with phone call to SDCC to ask that Splityard Creek Dam Emergency Polygon is activated Internal • DDO • As per previous activation level, plus • As per previous activation level • As per previous activation level • Inform previous notifications of EAP Notifications deactivation and stand down • DSTDM • Incident and Near Miss Alert • CleanCo Communications Team External • Nil • Police • As per previous activation level, plus • As per previous activation level • Inform previous notifications of EAP Notifications deactivation and stand down • LDMG • D/S Residents • SDCC Watch Desk
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Table 9: Earthquake – IC external communication plan
Activation Message Trigger for communications Group to contact Method Message text level code
• Earthquake reported or felt in the area Internal communications only Alert • Intensity less than 5 MM
• Earthquake reported or felt in the area 1. Police Phone & Quake 1 Describe current situation with Dam: Email • Intensity greater than or equal to 5 MM, 2. LDMG What is the event (Dam safety risk – earthquake) or What is the status (Under investigation) Lean • Intensity less than 5 MM and change Advise EAP has been activated Forward detected during surveillance inspection Advise current storage level • EAP activated LDMG and Police to stand by for further information
Incident and Near Miss Alert SAP System Splityard Creek Dam – Earthquake reported in the area
• Earthquake reported or felt in the area, 1. D/S Residents Landline Quake 2 CLEANCO EMERGENCY NOTIFICATION and Voice DAM: SPLITYARD CREEK Message & • A possible failure path has been SMS EVENT: DAM SAFETY RISK – EARTHQUAKE identified STATUS: CONFIRMED EARTHQUAKE DAMAGE ACTION: POSSIBLE ISSUE AT DAM, LISTEN FOR FURTHER ADVICE 2. Police Phone & Quake 2 Describe current situation with Dam: 3. LDMG Email What is the event (Dam safety risk – earthquake felt or reported in area) Stand Up 1 What is the status (Possible earthquake damage to dam) Advise current storage level and discuss any necessary road/bridge closures LDMG and Police to prepare for possible evacuations 4. SDCC Watch Desk Email & Quake 2 Complete Emergency Alert Request Form and send to SDCC Watch Desk Phone Follow up with phone call to ask that Splityard Creek Dam Emergency Polygon is activated Message as shown above for D/S Residents Incident and Near Miss Alert SAP System Splityard Creek Dam – Failure possible but not in progress
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Table 9: Earthquake – IC external communication plan
Activation Message Trigger for communications Group to contact Method Message text level code
• Failure likely due to earthquake, and 1. D/S Residents Landline Quake 3 CLEANCO EMERGENCY NOTIFICATION – URGENT Voice • DAM: SPLITYARD CREEK Sufficient water in storage to create a Message & dam failure hazard SMS EVENT: DAM SAFETY RISK – EARTHQUAKE STATUS: DAM FAILURE LIKELY ACTION: POSSIBLE EVACUATION, FOLLOW INSTRUCTIONS OF EMERGENCY SERVICES 2. Police Phone Quake 3 Describe current situation with Dam: 3. LDMG What is the event (Dam safety risk – earthquake) What is the status (Dam failure likely) Advise current storage level and discuss any road/bridge closures LDMG and Police to prepare coordinated evacuation 4. SDCC Watch Desk Email & Quake 3 Complete Emergency Alert Request Form and send to SDCC Watch Desk Phone Follow up with phone call to ask that Splityard Creek Dam Emergency Polygon is activated Message as shown above for D/S Residents Incident and Near Miss Alert Splityard Creek Dam – Earthquake failure likely Stand Up 2 • Dam failure in progress, and 1. D/S Residents Landline Quake 4 CLEANCO EMERGENCY NOTIFICATION – URGENT Voice • Sufficient water in storage to create a DAM: SPLITYARD CREEK Message & dam failure hazard SMS EVENT: DAM SAFETY RISK – EARTHQUAKE STATUS: DAM FAILURE IN PROGRESS ACTION: MOVE TO HIGHER GROUND 2. Police Phone Quake 4 Describe current situation with Dam: 3. LDMG What is the event (Dam safety risk – earthquake) What is the status (Dam failure in progress) Advise current storage level LDMG and Police to coordinate evacuation of Downstream Residents 4. SDCC Watch Desk Email & Quake 4 Complete Emergency Alert Request Form and send to SDCC Watch Desk Phone Follow up with phone call to ask that Splityard Creek Dam Emergency Polygon is activated Message as shown above for D/S Residents Incident and Near Miss Alert Splityard Creek Dam – Earthquake failure in progress
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Table 9: Earthquake – IC external communication plan
Activation Message Trigger for communications Group to contact Method Message text level code
• No change detected or no damage found 1. D/S Residents (if from Landline Quake 5 CLEANCO EMERGENCY NOTIFICATION during the inspections, or Stand Up) Voice DAM: SPLITYARD CREEK Message & • Risk assessment has determined that EVENT: DAM SAFETY RISK - EARTHQUAKE failure risk has reduced to an acceptable SMS STATUS: EMERGENCY CONDITION STOOD DOWN level ACTION: NONE Stand • Repairs completed as necessary Down 2. Police Phone & Quake 5 Describe current situation with Dam: 3. LDMG Email What is the event (Dam safety risk – earthquake) What is the status (Emergency condition stood down) Advise risk assessment has been determined that failure risk has reduced and that EAP has been deactivated
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Table 10: Earthquake –DSTDM emergency action
Activation level Alert Lean Forward Stand Up 1 Stand Up 2 Stand Down
Activation • Earthquake reported or felt in the • Earthquake reported or felt in the area • Earthquake reported or felt in the area, • Failure in progress or likely due to • No change detected or no trigger area and earthquake, and damage found during the • Intensity greater than or equal to 5 MM, inspections, or • Intensity less than 5 MM (using or • A possible failure path has been identified • Sufficient water in storage to Modified Mercalli Scale create a dam failure hazard •Risk assessment has determined • Intensity less than 5 MM and change that failure risk has reduced to an detected during surveillance inspection acceptable level • EAP activated • Repairs completed as necessary Action • Monitor situation and assess risks • As per pervious activation level, plus: • As per pervious activation level, plus: • As per pervious activation level, • Forwaed information for EEC to plus: IC • Liaise with DDO and IC • Review DDO surveillance inspection of • Arrange an inspection of the dam and the dam and assess its condition as soon assess its condition as soon as possible, •Liaise with DDO and advise the IC •Return to routine activities • Record all communications as possible if safe to do so on need to recommend evacuations • Determine if there are possible failure • Assess risk and determine if failure likely paths from reported damage or in progress NOTE: An earthquake is ‘reported’ • • when an alert is received from Advise DDO on frequency of future Determine if remedial repairs are Geoscience Australia or other inspections practical and advise DDO and IC source. • Advise IC on potential machinery and • Determine if risks can be reduced by materials that may be required to affect lowering storage repairs • Supervise* remedial repairs (if applicable) • Liaise with IC regarding road/bridge closures Internal • DDO • As per previous activation level • As per previous activation level, plus • As per previous activation level • As required Notifications • IC • Crisis Management Team External • Nil • Dam Safety Regulator • As per previous activation level • As per previous activation level • As required Notifications
* Supervision means provide technical oversight to the work. It does not necessarily mean onsite supervision
ALL ACTION MUST BE TAKEN WHEN IT IS SAFE TO DO SO eg taking photographs/video, dam inspections, instrument readings. ALL PHOTOS MUST BE DATE STAMPED
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7. Dam hazard – Terrorist threat/activity or high energy impact
7.1 Overview The emergency action described in this section relates to a potential dam failure hazard due to a terrorist threat or activity or a high energy impact on the dam such as a plane crash or meteor. Advice from authorities of a specific risk to water infrastructure is a circumstance that could indicate increased likelihood a terrorist threat. If this were specific enough to name a dam, this circumstance would trigger Stand Up—1 activation level. However, the vulnerability of Splityard Creek Dam to a terrorist attack is low. The area likely to be affected by this emergency event is described as: • if dam failure does not occur then there will not be any area affected • if dam failure does occur then the maximum area affected is the level shown by the SDF line on the maps in Appendix B.
7.2 Emergency Actions Table 11 to Table 14 specify emergency actions for the following roles: • DDO • IC • DSTDM
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Figure 5: Terrorist threat/activity or high energy impact
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Table 11: Terrorist threat/activity or high energy impact – DDO emergency action
Activation Alert Lean Forward Stand Up 1 Stand Up 2 Stand Up 3 Stand Down level
Activation • Alert/brief received from QPS THREAT EVENT IN PROGRESS RESPONSE • No damage found during the trigger Security and Counter-Terrorism • Possible terrorist activity or suspicious • Large explosion heard/observed at the dam • Failure in progress or likely due to inspections, or Command relevant to dam safety behaviour noticed at the dam (e.g. bomb explosion, aircraft hit) impact or explosion, and • Risk assessment has determined • Threat received relevant to dam safety • Damage observed on the dam • Sufficient water in storage to create a that failure risk has reduced dam failure hazard • EAP activated • Repairs completed as necessary Actions • Continue routine activities and • Notify Police on 000 • As per previous activation level, plus: • As per previous activation level, plus: • Forward information for EER to IC inspections at the Dam, but with a • Inspect dam (if safe) and ensure all • Carry out inspections as directed by DSTDM • Vacate the immediate vicinity of the • Log book is to be updated heightened awareness to look for security measures in place (locked affected area any unusual activity at the Dam • Support/supervise remedial works as • Return to routine activities gates etc) required, if safe to do so • Instruct others to lower the storage, if •Liaise with the DSTDM and IC • Liaise with the DSTDM following the not already instructed and respond as directed • Instruct others to lower the storage, if inspection directed or considered necessary • Liaise with IC and DSTDM re potential •Maintain photographic record and send evacuations • Consider closing any affected roads, if not to DSTDM following the inspection already closed by others • Complete and send the Inspection Sheet to DSTDM following each inspection • Notify SO • Log Book entry • If Police appoint incident manager, support and follow instructions Internal • DSTDM • DSTDM • As per previous activation level • As per previous activation level • As required Notifications • IC • IC • SO External • Nil • Police (000) • Nil • Nil • Nil Notifications
ALL ACTION MUST BE TAKEN WHEN IT IS SAFE TO DO SO eg taking photographs/video, dam inspections, instrument readings. ALL PHOTOS MUST BE DATE STAMPED
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Table 12: Terrorist threat/activity or high energy impact – IC emergency action
Activation level Alert Lean Forward Stand Up 1 Stand Up 2 Stand Up 3 Stand Down
Activation • Alert/brief received from QPS Security THREAT EVENT IN PROGRESS RESPONSE • No damage found during the trigger and Counter-Terrorism Command • Possible terrorist activity or suspicious • Large explosion heard/observed at • Failure in progress or likely due to inspections, or relevant to dam safety behaviour noticed at the dam the dam (e.g. bomb explosion, aircraft impact or explosion, and • Risk assessment has determined that hit) • Threat received relevant to dam • Sufficient water in storage to create a failure risk has reduced safety • Damage observed on the dam dam failure hazard • Repairs completed as necessary • EAP activated Actions • Liaise with DDO and DSTDM re situation • Notify Police on 000 (if not completed • As per previous activation level, plus: • As per previous activation level, plus: • Deactivate EAP by DDO) • Assess appropriate response with • Mobilise resources to undertake • Liaise with DDO, DSTDM, Police and • Compile EER and organise delivery to CleanCo’s Crisis Management Team • Activate EAP remedial works if directed by DSTDM LDMG re potential for evacuations the Regulator within 30 days of the completion of the event • Liaise with Police and LDMG re • Liaise with Police and LDMG situation regarding potential road/bridge • Complete Situation Report (final) closures, if directed by DSTDM • Complete Situation Report, unless • •Return to routine activities otherwise directed • Send D/S Residents landline voice and SMS messages • If Police appoint incident manager, support and follow instructions • Complete Emergency Alert Request Form and send to SDCC Watch Desk • Monitor situation and assess risks • Follow up with phone call to SDCC to • Complete Incident and Near Miss ask that Splityard Creek Dam Alert Emergency Polygon is activated Internal • DDO • As per previous activation level, plus: • As per previous activation level • As per previous activation level • Inform previous notifications of EAP Notifications deactivation and stand down • DSTDM • Incident and Near Miss Alert • CleanCo Crisis Management Team • CleanCo Communications Team External • Nil • Police, if not completed by DDO • As per previous activation level, plus: • As per previous activation level • Inform previous notifications of EAP Notifications deactivation and stand down • LDMG • D/S Residents
• SDCC Watch Desk
ALL ACTION MUST BE TAKEN WHEN IT IS SAFE TO DO SO eg taking photographs/video, dam inspections, instrument readings. ALL PHOTOS MUST BE DATE STAMPED
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Table 13: Terrorist threat/activity or high energy impact – IC external communication plan
Activation Message Trigger for communications Group to contact Method Message text level code Alert • Alert/brief received from QPS Security and Counter-Terrorism Command Lean Internal communications only relevant to dam safety Forward
THREAT 1. Police on 000, if not 1. Phone Emergency 1 Describe current situation with Dam: completed by DDO • Possible terrorist activity or suspicious What is the event (Dam safety risk – suspicious behaviour /security threat, etc) behaviour noticed at the dam 2. LDMG 2. Phone & What is the status (Noticed suspicious behaviour at the dam /received terrorist threat) Stand Up 1 • Threat received relevant to dam safety email Police to activate emergency response • EAP activated Incident & Near Miss Alert SAP System Splityard Creek Dam – Possible terrorist activity / security threat
EVENT IN PROGRESS 1. D/S Residents Landline Emergency 2 CLEANCO EMERGENCY NOTIFICATION – URGENT Voice • Large explosion heard/observed at the DAM: SPLITYARD CREEK Message & dam (e.g. bomb explosion, aircraft hit) SMS EVENT: DAM SAFETY RISK - SECURITY THREAT • Damage observed on the dam STATUS: UNDER INVESTIGATION ACTION: POSSIBLE EVACUATION, FOLLOW INSTRUCTIONS OF EMERGENCY SERVICES
2. Police on 000 (if event 2. Phone Emergency 2 Describe current situation with Dam: commenced at Stand Up 2) Stand Up 2 What is the event (Dam safety risk – security threat /impact /explosion etc) 3. LDMG 3. Phone & What is the status (Under Investigation) email LDMG and Police to prepare coordinated evacuation
4. SDCC Watch Desk Email & Emergency 2 Complete Emergency Alert Request Form and send to SDCC Watch Desk Phone Follow up with phone call to ask that Splityard Creek Emergency Polygon is activated Message as shown above for D/S Residents
Incident and Near Miss Alert SAP System Splityard Creek Dam – Security event in progress
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Table 13: Terrorist threat/activity or high energy impact – IC external communication plan Activation Message Trigger for communications Group to contact Method Message text level code RESPONSE 1. D/S Residents Landline Emergency 3 CLEANCO EMERGENCY NOTIFICATION – URGENT Voice • Failure in progress or likely due to DAM: SPLITYARD CREEK Message & impact or explosion; and SMS EVENT: DAM SAFETY RISK - SECURITY THREAT • Sufficient water in storage to create a STATUS: DAM FAILURE LIKELY / IN PROGRESS dam failure hazard ACTION: MOVE TO HIGHER GROUND 2. Police 2. Phone Emergency 3 Describe current situation with Dam: Stand Up 3 3. LDMG 3. Phone & What is the event (Dam safety risk – Security threat/ impact/ explosion etc.).
email What is the status (Dam failure likely/ in progress) LDMG and Police to initiate evacuations 4. SDCC Watch Desk Email & Emergency 3 Complete Emergency Alert Request Form and send to SDCC Watch Desk Phone Follow up with phone call to ask that Splityard Creek Emergency Polygon is activated Message as shown above for D/S Residents Incident and Near Miss Alert SAP System Splityard Creek Dam – Security event in progress
• No damage found during the 1. D/S Residents Landline Emergency 3 CLEANCO EMERGENCY NOTIFICATION inspections, or Voice DAM: SPLITYARD CREEK Message & • Risk assessment has determined that SMS EVENT: DAM SAFETY RISK - SECURITY THREAT failure risk has reduced STATUS: EMERGENCY CONDITION STOOD DOWN Stand • Repairs completed as necessary ACTION: NONE Down 2. Police Phone & Describe current situation with Dam: 3. LDMG Email What is the event (Dam safety risk – Security threat/ impact/ explosion etc) What is the status (Emergency condition stood down) Advise that failure risk has been reduced and EAP has been deactivated
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Table 14: Terrorist threat/activity or high energy impact –DSTDM emergency action
Activation level Alert Lean Forward Stand Up 1 Stand Up 2 Stand Up 3 Stand Down Activation trigger • Alert/brief received from QPS Security THREAT EVENT IN PROGRESS RESPONSE • No damage found during the and Counter-Terrorism Command • Possible terrorist activity or • Large explosion heard/observed at the • Failure in progress or likely due to inspections, or relevant to dam safety suspicious behaviour noticed at dam (e.g. bomb explosion, aircraft hit) impact or explosion, and • Risk assessment has the dam • Damage observed on the dam • Sufficient water in storage to determined that failure risk has • Threat received relevant to dam create a dam failure hazard reduced safety • Repairs completed as necessary • EAP activated Action • Liaise with DDO and IC re situation • As per previous activation level, • As per previous activation level, plus: • As per previous activation level, • Forward information for EER to • Assess appropriate response with plus: • Arrange an inspection of the dam and plus: IC CleanCo’s Crisis Management Team • Liaise with the Dam Safety assess its condition as soon as possible, • Liaise with DDO and advise the IC • Return to routine activities Regulator if safe to do so on need to recommend • Assess risk and determine if failure likely evacuations or in progress • Determine if risks can be reduced by lowering storage and advise DDO • Determine if remedial repairs are practical and advise DDO and IC • Supervise* remedial repairs (if applicable) • Liaise with IC regarding road/bridge closures • Consider increasing the frequency of surveillance inspections and advise DDO
Internal • DDO • As per previous activation level • As per previous activation level • As per previous activation level • As required Notifications • IC • CleanCo Crisis Management Team
External • Nil • Dam Safety Regulator • As per previous activation level • As per previous activation level • As required Notifications
* Supervision means provide technical oversight to the work. It does not necessarily mean onsite supervision
ALL ACTION MUST BE TAKEN WHEN IT IS SAFE TO DO SO eg taking photographs/video, dam inspections, instrument readings. ALL PHOTOS MUST BE DATE STAMPED
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Notifications and communication lists
Appendix A1: Wivenhoe Power Station notifications list Appendix A2: Brisbane notifications list Appendix A3: External notifications list Appendix A4: D/S residents notifications list Appendix A5: Other D/S residents notifications list Appendix A6: Emergency alert polygon Appendix A7: Sunny Day Failure (SDF) flood extent and PAR property locations Appendix A8: Dam failure emergency alert request
Appendix A1 to A5 have been redacted
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: Emergency alert polygon Figure 6: Emergency alert polygon
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: Sunny Day Failure (SDF) flood extent and PAR property locations Figure 7: Sunny Day Failure (SDF) flood extent and PAR property locations
19 18
17
20
Dependent upon the progression of the failure mode and activation level, due to the close proximity of the PAR to Splityard Creek Dam and the short ‘travel times’ of a dam breach flood, notifications may be undertaken directly by Wivenhoe Power Station staff. Where there is time, CleanCo will arrange for notifications to be delivered through the SDCC.
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: Dam failure emergency alert request Queensland emergency alert request guidelines An Emergency Alert Request form should be completed, if required (see Sections 5, 6 and 7 for actions), and sent to the SDCC Watch Desk in order to activate the Splityard Creek Dam Emergency Alert Polygon. Instructions • This form is not to be used for Flood UNLESS a flood has triggered a dam hazard. • Print off the following QFES Emergency Alert Request form. • Telephone the SDCC Watch Desk on 07 3635 2387 or 0408 190 872 and tell them your intention to use the Emergency Alert for a dam hazard for Splityard Creek Dam. • A KML Polygon for this dam is stored in the “Splityard Creek Dam” area of the “Referable Dams” Folder. Ask the SDCC operative to locate the polygon. It is a KML file called “SplityardCkDam_Downstream.kml” Emergency Polygon. • Give them your phone number, confirm their name, and end the call after advising the form will be sent shortly. • IC and DSTDM will work together to craft a message relevant to the hazard and discuss with the LDMG (Council), if there is time. • Fill in the form and send to SDCC watch desk email: [email protected]. This form must come from the IC, DSTDM, or member of the Executive. • Phone back to check the message has been sent and ask for an email to confirm. • Send an internal Incident Alert to advise of completion. • This form MUST be sent from a CleanCo email address. If CleanCo email is not functional, they can confirm identification through the Regulator, if required. • Where relevant, use the text in the IC Communication Plans in the relevant dam hazard tables in Sections 5, 6 and 7 to complete the emergency alert request.
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Sample only, create a new file using template W/D/20/54
Figure 8 Emergency Alert Request form
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EMERGENCY ALERT REQUEST Location: Ipswich & Somerset LGAs Date: xx / xx / xx20 Time: xxxx hrs Requesting Officer: Name Telephone: 24/7 available mobile no.
Agency/Position: CleanCo Email: email address
Cyclone Storm Surge Flash Flood Flood Event Bushfire Fire Incident Smoke or Toxic Plume Chemical Spill Type Tsunami (NOTE Tsunami EA campaigns will be sent as Location Based Text Message ONLY)
Other (please specify): Dam Emergency
Message Severity Emergency Warning (NOTE activates the SEWS) Watch & Act Advice
Campaign Mode Voice SMS – Location Based SMS – Service Address Based
LDMG Advised YES NO DDMG Advised YES NO
Threat Direction Required? YES NO Note: Can only be used for Emergency Warnings. Indicate direction on map STEP 2. Filename: Use North Burnett LGA Boundary for EA STEP 1. EA Polygon Area: Use North Burnett LGA Boundary Campaign STEP 3. Spatial format: (Indicate the format used) STEP 4. Messaging/spatial data, is it supplied via KML *.kml (preferred format as per Spatial guidelines) DMportal - specify filenames below ESRI *.dbf, *.prj, *.shp, *.shx FTP - specify filenames below GML *.gml, *.xsd Email MapInfo TAB *.dat, *.id, *.map, *.tab Other (please specify) MapInfo Mid/Mif *. MIDI Sequence, *.mif Filename: SplityardCkDam_Downstream.kml (saved in OTHER the “Referable Dams” > ”Splityard Creek Dam” folder on the EA Portal
Type (please use capitals for clarity) or handwrite Voice message (Ideally message should be less than 450 characters).
This is a Dam Emergency message from Ipswich and Somerset Councils. There is a dam emergency occurring at the split yard creek dam. [more detailed warning information as required]. Residents downstream of the split yard creek dam should [action to take]. For more information, listen to local radio, or visit [website], or call [hotline]. In the case of a life threatening emergency, please dial triple zero immediately.
Type or handwrite SMS below (maximum of 160 characters including spaces)
Ipswich / Somerset Councils advise: Dam Emergency at the Splityard Creek Dam. [Action to take]. [Website / Hotline / Radio for more information]
SEND TO [email protected] and call 07 36352387 TO CONFIRM
FOR USE BY SDCC Requesting Officer: Signature / /20 Manual Transmission EMS Transmission EA User Name: Signature / /20 EA Campaign No. ______Authorising Officer Name: Signature / /20 EMS Report ID: ______
EA Manual and the Emergency Alert Request Form Template are available at: www.disaster.qld.gov.au
DO NOT SEND THIS PAGE GUIDE TO COMPLETE STEPS 1 – 4 EA Polygon Area (e.g. detailed description and location reference to allow positive identification of message area, including street names with cross street, areas of interest such as parks, rivers, dams, STEP 1. coastal areas) it is preferable to attach a map identifying the message area. If a Threat Direction has been requested, please clearly indicate it on the map.
STEP 2. Tick applicable box and note the file name.
Voice Message: type or handwritten the required message. As the message will be translated by a text-to-speech process it is important that words are not unintelligible when translated e.g. “qld” used in a web site address must be entered as “q l d”, similarly the word “dot” must be entered into STEP 3. a web address instead of a full stop. Voice Message ideally should have no more than 450 characters including spaces. Do not use special characters – refer to EA Manual for details. Warning message must start with “Emergency Emergency”
SMS Is restricted to a maximum of 160 characters including spaces and punctuation. Either type the STEP 4. message or handwrite the characters into the boxes.
Example: SMS Flash Flood Warning from SES for Opal Valley-immediate threat to life/property-Warn others-Leave area/prepare NOW or seek higher ground-Listen to local radio
If using template EA messages, please provide the appropriate variables that are in the template message guides. Refer to the Queensland Emergency Alert Manual for copies of the template message guides.
//RELEVANTAUTHORITY//
//DIRECTIONANDAREA//
//NAME//
//NUMBER//
//TIME//
//TIMEandDAY//
//DIRECTIONandPLACE//
//HOURSMINUTES//
//PLACE//
//PLACEPLACE//
//EXTERNAL/INTERNAL//
//SUBURBS//
//FireIncident//
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Flood impact downstream and inundation maps
Appendix B1: Modelled peak flood velocities Appendix B2: Modelled peak flood depths
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: Modelled peak flood velocities Peak flood velocities are predicted to occur along the length of Pryde Creek with maximum values exceeding 7m/s as shown in Figure 9. Velocities in this order are considered ‘extreme’ and any buildings experiencing velocities in this order are expected to be severely damaged or destroyed. Figure 9: Modelled peak flood velocities
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: Modelled peak flood depths Peak flood depths are predicted to exceed 4.5 m through much of Pryde Creek as shown in Figure 10. This is due to the ‘incised’ nature of the channel. Figure 10: Modelled peak flood depths
Note: Actual levels may differ from those shown in flood inundation maps due to variations in assumptions made in the models to actual flood events.
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Routine and emergency access routes
Normal access routes The dam and surrounds are accessed by way of the perimeter gates and the access tracks within the boundary fences. Keys to the gates are held in the key cabinet in the station office. The Wivenhoe 4-wheel drive vehicles are to be used for access to the Splityard Creek Dam tracks for inspections and observations. The normal access to Wivenhoe Power Station and Splityard Creek Dam is via the Brisbane Valley Highway, then Wivenhoe Somerset Road. Wivenhoe Somerset Road will become hazardous in the event of a catastrophic failure of Splityard Creek Dam. For levels of severity Stand Up–1 and Stand Up-2, Wivenhoe Somerset Road should only be used on the advice of personnel physically inspecting the condition of the dam for evaluating “possibility of failure” status. Emergency access routes In the event of Wivenhoe Somerset Road not being accessible from the Brisbane Valley Highway, other methods of access to Splityard Creek Dam are (not in priority order): Refer to Figure 11 for a map of the routes with indicative travel times.
Options Alternative Route 1 Boat access from Seqwater information centre at Wivenhoe Dam across the lake to Wivenhoe Power Station, with cooperation from Seqwater personnel. Access from Wivenhoe Power Station to Splityard Creek Dam is unlikely to be restricted. 2 Vehicle access north via Brisbane Valley Highway through Esk, then east via Esk Kilcoy Road to Somerset, then south via Wivenhoe Somerset Road to Splityard Creek Dam. 3 Vehicle access north-west via Samford Road to Samford, then west via Mt Glorious Road to Mt Glorious, then west via Mount Glorious Road continuing onto Northbrook Parkway to a tee intersection with Wivenhoe Somerset Road, then south via Wivenhoe Somerset Road to Splityard Creek Dam. 4 North from Brisbane via Bruce Highway to Caboolture, then west via D’Aguilar Highway to Kilcoy, then south via Esk Kilcoy Road to Somerset, then south via Wivenhoe Somerset Road to Splityard Creek Dam.
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Figure 11 Map of emergency access routes
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Machinery and equipment
Equipment required for undertaking inspections include: • Keys for access gates. Keys to the gates are held in the key cabinet in the Wivenhoe Power Station office. • Measuring tapes for V-notch leakage weirs – carried in the 4-wheel drive vehicles. • Dam inspection sheet and clipboard • V-notch spreadsheet located electronically in CleanCo’s record management system • Torches, if inspections are carried out at night, held in the Wivenhoe Power Station tool store. • 2-way radios for communications – carried by each individual Wivenhoe Power Station staff member. • Cameras for images of V-notch weir water colour, and any observed defects at the outlet works, the embankment, the abutments, or any other location – held in Wivenhoe Power Station office. Table 15: List of machinery and equipment available during an emergency
Name of equipment No Owner Contact number Location
Satellite phone 1 CleanCo 5427 1100 Wivenhoe Power Station Small front-end loader 1 CleanCo 5427 1100 Wivenhoe Power Station 4-wheel drive vehicles 3 CleanCo 5427 1100 Wivenhoe Power Station First aid & rope rescue access equipment CleanCo 5427 1100 Wivenhoe Power Station Office space for coordination of emergency 2 CleanCo 5427 1100 Wivenhoe Power Station
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Technical information
Appendix E1: DRAWING A3-73669 – SPLITYARD CREEK DAM – OPERATIONAL CURVES FOR MAXIMUM DRAWDOWN RATES Appendix E2: DRAWING A4-83876 – SPLITYARD CREEK DAM – SPILLWAY DISCHARGE CURVE Appendix E3: DRAWING S 46966 – SPLITYARD CREEK DAM – RESERVOIR STORAGE CURVES Appendix E4: MAP – SPILTYARD CREEK DAM – CATCHMENT AREA Appendix E5: DRAWING A1-48283E – SHEET 1 OF 2 – SPLITYARD CREEK DAM – EMBANKMENT, SECTION AND DETAILS Appendix E6: DRAWING A1-48284C – SHEET 2 OF 2 – SPLITYARD CREEK DAM – EMBANKMENT, SECTION AND DETAILS Appendix E7: DRAWING A3-243211B – SPLITYARD CREEK DAM – INSTRUMENTATION GROUNDWATER OBSERVATION HOLES AND MEASURING WEIRS
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: DRAWING A3-73669 – SPLITYARD CREEK DAM – OPERATIONAL CURVES FOR MAXIMUM DRAWDOWN RATES
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: DRAWING A4-83876 – SPLITYARD CREEK DAM – SPILLWAY DISCHARGE CURVE NOTE: Spillway discharges flow north into Branch Creek and return to Wivenhoe Lake. Spillway discharges do not enter the original watercourse south into Pryde Creek
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: DRAWING S 46966 – SPLITYARD CREEK DAM – RESERVOIR STORAGE CURVES
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: MAP – SPILTYARD CREEK DAM – CATCHMENT AREA
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: DRAWING A1-48283E – SHEET 1 OF 2 – SPLITYARD CREEK DAM – EMBANKMENT, SECTION AND DETAILS
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: DRAWING A1-48284C – SHEET 2 OF 2 – SPLITYARD CREEK DAM – EMBANKMENT, SECTION AND DETAILS
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: DRAWING A3-243211B – SPLITYARD CREEK DAM – INSTRUMENTATION GROUNDWATER OBSERVATION HOLES AND MEASURING WEIRS
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Summary of legal requirements
SUMMARY OF LEGAL REQUIREMENTS – SECTION 352H Section 352H(1) of the Act requires that the EAP must identify each dam hazard for the dam; and for each of these dam hazard types (e.g., flood operations, or chemical spill/toxic conditions): 1. identify the area likely to be affected by a dam hazard event or emergency event arising from the dam hazard; and 2. identify each circumstance that indicates a material increase in the likelihood of the dam hazard event or emergency event happening; and 3. state when and how the owner of the dam plans to warn persons who may be harmed, or whose property may be harmed by an event caused by the dam hazard, if one happens, and/or there is a material increase in the likelihood of an occurrence, including the order of priority in which the persons or categories of persons are to be warned; and 4. state when and how the owner plans to notify the relevant entities for the dam, if a dam hazard event or emergency event happens or, there is a material increase in the likelihood of such an occurrence, including the order of priority in which the relevant entities are to be notified; and 5. state the actions the owner of the dam plans to take in response to a dam hazard event or emergency event. In accordance with section 352H(2) of the Act, the EAP may provide for the dam owner to make arrangements with a relevant entity for warnings to be given by the relevant entity on behalf of the dam owner in appropriate circumstances. Section 352HA of the Act states that before giving the chief executive an EAP, the owner of the dam must give a copy of the plan to each local government whose area may be affected by a dam hazard identified in the plan; and each district group for the plan. Section 352HB of the Act states that the local government must assess the EAP for consistency with its disaster management plan. In its assessment, the local government must consult with the local district group for the plan. Within 30 business days of receiving the EAP, the local government must give the owner of the dam a notice, which states whether it considers the plan is consistent with its disaster management plan; and if not, give reason why it considers the EAP is not consistent. The EAP must include any such notices, provided to the owner of the dam by a local government (or district group); and any responses which the owner gives to these notices. Section 352H(1) further stipulates that an EAP must include any other relevant matter prescribed by regulation. The local government whose area may be affected by a dam hazard for Splityard Creek Dam has been assessed as Somerset Regional Council (SRC). CS Energy has provided the SRC with a copy of the draft EAP for assessment. Section 352HC of the Act states that a district group may review the EAP for consistency with its disaster management plan. The district group for Splityard Creek Dam is Ipswich District Disaster Management Group (DDMG). CS Energy has provided the DDMG with a copy of the draft EAP for review.
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Notices from local government and district groups including responses
Appendix G1: Local government consultation and interaction Appendix G2: District groups consultation and interaction
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: Local government consultation and interaction Workshops In preparation of this EAP version 9, workshops were undertaken as follows, with representatives from Local Government including the Local District Coordinator and the Disaster Management Officer from Somerset Regional Council. 1. Workshop to test the EAP version 8 on 21 May 2019. 2. Workshop to review a first draft of the EAP version 9 on 18 June 2019. Notices Figure 12: Local Government Notice
Responses No response required – not applicable.
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: District groups consultation and interaction Workshops In preparation of this EAP version 9, workshops were undertaken as follows, with representatives from the District Group including the DDMG, QPS (Ipswich District Police and Lowood Police Station), QFES and the Dam Safety Regulator. 1. Workshop to test the EAP version 8 on 21 May 2019. 2. Workshop to review a first draft of the EAP version 9 on 18 June 2019. Notices An email was received on Tuesday 16 July 2019, but no formal notice was provided. Responses No response required – not applicable.
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Emergency action plan – Toolkit
Appendix H1: Dam hazard emergency event recording sheets Appendix H2: Dam hazard specific forms
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: Dam hazard emergency event recording sheets
Dam Hazard Emergency Event Recording Sheets
This sub-appendix includes the following recording sheets: • Dam Hazard Emergency Event Record sheet • Record of Communication and Log of Events / Actions sheet
These sheets must be completed for all Dam Hazard Emergency Event Scenarios, and ** NOTE: included in the Emergency Event Report.
NOTE: The following sheets must be photocopied and completed during Dam Hazard Emergency Event Scenarios and be included in the Emergency Event Report (EER). This Report is to be completed within 30 business days following an event as specified in Clauses 352T, 352U and 352V of the Water Supply (Safety and Reliability) Act 2008.
1. Sheets filled in by hand are to be scanned and included in the final PDF copy of the completed Emergency Event Report.
2. Electronic data recording sheets may be compiled and used, and templates set up in relevant TRIM file location for EAP correspondence – TRIM folder F/14/1763
3. Once completed with data relating to the Emergency Event Report (EER) these sheets are to be saved in the above EAP correspondence location.
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DAM HAZARD EMERGENCY EVENT RECORD
COMPLETE THIS COVER SHEET AND ATTACH RELEVANT RECORDING SHEETS 1. NATURE OF THE EVENT (circle the event) Earthquake Piping Terrorist Activity/Hoax/Other
Commencing: Time ___:___am/pm; Date ___/___/______Finishing: Time ___:___am/pm; Date ___/___/______
2. DESCIPTION OF THE EVENT Attach relevant sheets from Appendix D 3. NOTIFICATION & STATISTICS
External entities to be Actual notification
notified, as per the EAP: provided:
Local Disaster Coordinator – Date: Phone Somerset Council
District Disaster Coordinator – Date: Phone Ipswich Police
Queensland Fire and Date: Phone Emergency Service – SDDC
Queensland Police Service - Date: Phone Lowood
Dam Safety Regulator Phone Date:
4. EVENT PROGRESS Attach copies of the Dam Water Level versus Time Graph, the Record of Communication, the Log of Events / Actions, and Rainfall during a Flood Event (Appendix D). 5. GENERAL COMMENTS Include in this section any observations or comments regarding the Event, such as equipment malfunctions, improved reporting, safety issues, or any suggestions which may improve monitoring of the Event.
6. DAMAGE REPORT Detail any damage to the Dam wall, Spillway, Abutments or Stream bank in the downstream area of the Dam. Attach photos.
Name: Signed: Designation: Date:
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SPLITYARD CREEK DAM – EMERGENCY ACTION PLAN RECORD OF COMMUNICATION AND LOG OF EVENTS / ACTIONS
Date Time Contact Person Phone No. Action Taken / Event Recorded / Message Sent or Received Call Sent By / Received By
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: Dam hazard specific forms
This sub-appendix includes the following forms: • Piping Inspection Sheet • Earthquake Inspection sheet • Terrorist Activity/ Threat/ Other Inspection Sheet
For condition specific forms shown in bold above, Show results of inspections as follows:-
• New NEW
• Significant increase (> 30%) or change in condition SG-INC
• Slight increase (> 10%) or change in condition INC
• NIL change of condition NIL
• Slight decrease (< 10%) or change in condition DEC
Significant Changes: Any changes which, in the opinion of the inspecting officer, are more than just slight changes must be advised to the DSTDM. The degree of urgency of this advice varies with the nature of the issue. Mark changes on a plan if appropriate.
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SPLITYARD CREEK DAM EAP Piping Inspection Sheet
Visual Inspection and Storage Report - REMEMBER: TAKE PHOTOS AND DATE STAMP THEM Date…………………..………..
Tick Day of the Week SUN MON TUE WED THU FRI SAT First Second Third Fourth VISUAL INSPECTION Inspection Inspection Inspection Inspection (Inspections should only be undertaken if / when it is safe to do so) (As directed) (As directed) (As directed) (As directed) (Walk or Drive at 10 km/hour. Write 'W' for walk and 'D' for Drive) Time Water Level – Max OL 166.5 m AHD (Spillway Level) Rainfall (mm) Location of new seepage point
Describe approximate location in words New seepage point Estimated flow L/s L/s L/s L/s Clear or turbid (tick for clear) Old seepage points Complete measuring weir sheet Main Embankment General condition/ Cracking Upstream Face (Use binoculars) General condition Displacement of riprap material Subsidence/ Slides/ Erosion Sign of seepage Downstream Face General condition Displacement of riprap material Subsidence/ Slides/ Erosion Sign of seepage Saddle Dam General condition Subsidence/ Slides/ Scouring/ Signs of seepage Details of significant changes. New occurrences and issues warranting further attention, Source of seepage (if known)
Sketch, locate, measure and photograph if possible. (sketch the problem area on the General Arrangement Plan) Inspecting Officer's initials * Fax/Email to Dam Safety Technical Decision Maker (tick if Faxed or Emailed) See Part 2 for Fax Number Incident Coordinator
* Original to be retained on site or in Area Office if no facility to store documents on site
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SPLITYARD CREEK DAM EAP Piping
** INSTRUCTIONS FOR COMPLETING SHEET - Piping
VISUAL INSPECTION (To be carried out when/if safe to do so)
STAGE 1 STAGE 2 STAGE 3 Frequency of visual inspection required is indicated by As directed As directed As directed
Additional Inspections should be made when: • New seepage which requires further action • When specifically requested
Show results of inspections as follows:-
• New seepage appeared NEW
• Significant increase (> 30%) or change in condition SG-INC
• Slight increase (> 10%) or change in condition INC
• NIL change of condition NIL
• Slight decrease (< 10%) or change in condition DEC
Significant Changes Any changes which, in the opinion of the inspecting officer, are more than just slight changes must be advised to the DSTDM. The degree of urgency of this advice varies with the nature of the issue. Mark changes on a plan if appropriate.
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SPLITYARD CREEK DAM EAP Earthquake Inspection Sheet
Visual Inspection and Storage Report - REMEMBER: TAKE PHOTOS AND THE DATE STAMP THEM Date…………………..………..
Tick Day of the Week SUN MON TUE WED THU FRI SAT Earthquake Intensity felt: ………………….MM First Second Third Fourth VISUAL INSPECTION Inspection Inspection Inspection Inspection (Inspection to be undertaken only when safe to do so) (As directed) (As directed) (As directed) (As directed) (Walk OR Drive at 10 km/hour. Write 'W' for walk and 'D' for Drive) Time Water Level – Max OL 166.5 m AHD (Spillway Level) Rainfall (mm) Main Embankment Upstream Face (Use binoculars) General condition Displacement of riprap material Subsidence/ Slides/ Erosion Sign of seepage Downstream Face General condition Displacement of riprap material Subsidence/ Slides/ Erosion Sign of seepage Spillway General condition Damage to concrete/ Movement/ Cracks Saddle Dam Upstream Face (Use binoculars) General condition Displacement of riprap material Subsidence/ Slides/ Erosion Sign of seepage Downstream Face General condition Displacement of riprap material Subsidence/ Slides/ Erosion Sign of seepage Spillway Channel General condition Scouring/ Damage to concrete structure Inlet Structure/ Outlet Works General condition Cracks/ Concrete deterioration Area Downstream of Dam General condition New seepage point Estimated flow L/s L/s L/s L/s Clear or turbid (tick for clear) Old seepage points Complete measuring weir sheet Details of significant changes. New occurrences and issues warranting further attention, additional records/inspections
New Cracks or Movements: Sketch, measure, photograph, and locate if possible. Sketch on the Plan (see over) Inspecting Officer's initials Fax/Email to * Original to be retained on site or in Dam Safety Technical Decision Maker (tick if Faxed or Emailed) Area Office if no facility to store See Part 2 for Fax Number Incident Coordinator
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SPLITYARD CREEK DAM EAP Earthquake
** INSTRUCTIONS FOR COMPLETING SHEET - Earthquake
VISUAL INSPECTION (To be carried out when/if safe to do so)
Earthquake less than Earthquake greater Alert Criteria, but felt than Alert Criteria: at the dam or in the COMPLETE ALL VISUAL Frequency of visual inspection required is indicated by: vicinity of the dam: INSPECTIONS (AND COMPLETE FIRST INSTRUMENTATION/ VISUAL INSPECTION SURVEY DATA IF ONLY APPLICABLE AS WELL)
Additional Inspections should be made when: • New cracks, settlements or sinkholes which requires further action • When specifically requested
Show results of inspections as follows:-
• New observation NEW
• Significant increase (> 30%) or change in condition SG-INC
• Slight increase (> 10%) or change in condition INC
• NIL change of condition NIL
• Slight decrease (< 10%) or change in condition DEC
Significant Changes Any changes which, in the opinion of the inspecting officer, are more than just slight changes must be advised to the DSTDM. The degree of urgency of this advice varies with the nature of the issue. Mark changes on a plan if appropriate.
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SPLITYARD CREEK DAM EAP Reported Earthquake
EARTHQUAKE / TREMOR INSTRUCTIONS The occurrence of a significant seismic event could endanger the integrity of the dam, and requires a specific emergency response. If an earthquake occurs which has a magnitude that meets or exceeds the alert criteria shown below, or has been reported to have occurred, then the Emergency Action Plans in Section 6 should be followed. REPORTED ALERT CRITERIA - Magnitude (Richter Scale) Magnitude >4.0 within 25 km radius of the dam Magnitude >5.0 within 50 km radius of the dam Magnitude >6.0 within 80 km radius of the dam Magnitude >7.0 within 125 km radius of the dam Magnitude >8.0 within 200 km radius of the dam
Detailed information on recent earthquakes in Australia and nearby regions is available at the Geoscience Australia website (Ref: http://www.ga.gov.au/earthquakes/). Reference should be made to the Geoscience Australia website to confirm magnitude and location of any earthquakes. The Modified Mercalli Scale is included at Figure 13 for understanding earthquake magnitude and contingency backup, if the Geoscience Australia website not accessible or not operating.
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SPLITYARD CREEK DAM EAP Felt Earthquake If any earthquake is felt at the dam or in the vicinity of the dam, which does not exceed the above criteria, then a routine inspection should be carried out by operating staff, and if any damage is observed, then the Emergency Action Plans in Section 6 should be followed. Figure 13 Modified Mercalli Scale for Felt earthquake magnitude assessment EARTHQUAKE ASSESSMENT (MODIFIED MERCALLI SCALE) MM 1 Not felt by humans, except in especially favourable circumstances, but birds and animals may be disturbed. Reported mainly from the upper floors of buildings more than 10 storeys high. Dizziness or nausea may be experienced. Branches of trees, chandeliers, doors and other suspended systems of long natural period may be seen to move slowly. Water in ponds, lakes reservoirs, etc. may be set into wave oscillation of short to long durations. MM 2 Felt by a few persons at rest indoors, especially by those on upper floors or otherwise favourably placed. The long-period effects listed under MM 1 may be more noticeable. MM 3 Felt indoors, but not identified as an earthquake by everyone. Vibration may be likened to passing of light traffic. It may be possible to estimate the duration, but not the direction. Hanging objects may swing slightly. Standing motorcars may rock slightly. MM 4 Generally noticed indoors, but not outside. Very light sleepers may be wakened. Vibration may be likened to the passing of heavy traffic, or to the jolt of a heavy object falling or striking the building. Walls and frame of buildings are heard to creak. Doors and windows rattle. Glassware and crockery rattles. Liquids in open vessels may be slightly disturbed. Standing motorcars may rock, and the shock can be felt by their occupants. MM 5 Generally felt outside, and by almost everyone indoors. Most sleepers awakened. A few people frightened. Direction of motion can be estimated. Small unstable objects are displaced or upset. Some glassware and crockery may be broken. Some windows cracked. A few earthenware toilet fixtures cracked. Hanging pictures move. Doors and shutters swing. Pendulum clocks stop, start, or change rate. MM 6 Felt by all. People and animals alarmed. Many run outside. Difficulty experienced in walking steadily. Some plaster cracks or falls. Isolated cases of chimney damage.
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EARTHQUAKE ASSESSMENT (MODIFIED MERCALLI SCALE) MM 7 General alarm. Difficulty experienced in standing. Noticed by drivers of motorcars. Trees and bushes strongly shaken. Large bells ring. A few instances of damage to masonry. Loose brickwork and tiles dislodged. Un-braced parapets and architectural ornaments may fall. Stone walls cracked. Weak chimneys broken, usually at the roof-line. Domestic water tanks burst. Concrete irrigation ditches damaged. Waves seen on ponds and lakes. Water made turbid by stirred-up mud. Small slips and caving-in of sand and gravel banks. MM 8 Alarm may approach panic. Steering of motorcars affected. Masonry damaged, with partial collapse. Chimneys, factory stacks, monuments, towers, and elevated tanks twisted or brought down. Panel walls thrown out of frame structures. Some brick veneers damaged. Decayed wooden piles broken. Frame houses not secured to the foundation may move. Cracks appear on steep slopes and in wet ground. Landslips in roadside cuttings and unsupported excavations. Some branches may be broken off. Changes in the flow or temperature of springs and wells may occur. Small earthquake fountains. MM 9 General Panic. Masonry heavily damaged, sometimes collapsing completely. Frame structures racked and distorted. Damage to foundations general. Frame houses not secured to the foundations shifted off. Brick veneers fall and expose frames. Cracking of the ground conspicuous. Minor damage to paths and roadways. Sand and mud ejected in alleviated areas, with the formation of earthquake fountains and sand craters. Underground pipes broken. Serious damage to reservoirs. MM Most masonry structures destroyed, together with their foundations. 10 Some well built wooden buildings and bridges seriously damaged. Dams, dykes and embankments seriously damaged. Railway lines slightly bent. Concrete and asphalt roads and pavements badly cracked or thrown into waves. Large landslides on river banks and steep coasts. Sand and mud on beaches and flat land moved horizontally. Large and spectacular sand and mud fountains. Water from rivers, lakes, and canals thrown up on the banks.
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SPLITYARD CREEK DAM EAP Terrorist Activity/ Threat/ Other Inspection Sheet (Circle Activity) Visual Inspection and Storage Report - REMEMBER: TAKE PHOTOS AND THE DATE STAMP THEM Date…………………..……….. Tick Day of the Week SUN MON TUE WED THU FRI SAT First Inspection Interim Inspection Final VISUAL INSPECTION (As directed) (As directed) Inspection Inspections should only be undertaken if / when it is safe to do so. (As directed)
(Walk OR Drive at 10 km/hour. Write 'W' for walk and 'D' for Drive) Time Water Level – Max OL 166.5 m AHD Rainfall (mm) Main Embankment General condition/ Damage Upstream Face (use binoculars) Settlement Displacement of riprap material or sink holes Downstream Face Sloughing Sign of seepage/ Subsidence/ Slides/ Erosion Area Downstream of Dam New seepage Increase in seepage Inlet Structure/ Outlet Works General condition Damage/ Cracking/ Spalling/ Construction joints Damage/ Deterioration of valves Spillway Channel scouring Damage to concrete Saddle Dam General condition/ Erosion/ Damage Seepage New seepage point Estimated flow L/s L/s L/s Clear or turbid (tick for clear) Old seepage points Complete measuring weir sheet Details of significant changes. New occurrences and issues warranting further attention
New Cracks or Movements: Sketch, measure, photograph, and locate if possible. Sketch on the Plan (see over) Inspecting Officer's initials * Fax/Email to Dam Safety Technical Decision Maker * Original to be retained on site or in Area Office if no facility to store (tick if Faxed or Emailed) Incident Coordinator documents on site See Part 2 for Fax Number
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SPLITYARD CREEK DAM EAP Terrorist Activity / Threat / Other
** INSTRUCTIONS FOR COMPLETING SHEET – Terrorist Activity / Threat / Other
VISUAL INSPECTION Frequency of visual inspection required is determined by the extent of damage AS DIRECTED
Additional Inspections should be made when • New cracks or breaching of dam is evident which require further action • When specifically requested
Show results of inspections as follows:-
• New observation NEW
• Significant increase (> 30%) or change in condition SG-INC
• Slight increase (> 10%) or change in condition INC
• NIL change of condition NIL
• Slight decrease (< 10%) or change in condition DEC
Significant Changes Any changes which, in the opinion of the inspecting officer, are more than just slight changes must be advised to the DSTDM. The degree of urgency of this advice varies with the nature of the issue. Mark changes on a plan if appropriate.
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MEASURING WEIR SEEPAGE MEASUREMENT READINGS SHEET Storage Date Time MW1 (mm) MW2 (mm) MW3 (mm) MW4 (mm) MW5 (mm) MW6 (mm) MW7 (mm) MW8 (mm) MW9 (mm) Level Clear / Clear / Clear / Clear / Clear / Clear / Clear / Clear / Clear / Clear / (m) Turbid 4 Turbid 2 Turbid 2 Turbid 2 Turbid 2 Turbid 2 Turbid 2 Turbid 2 Turbid 2 Turbid 2
4 Seepage water – Clear or Turbid (tick for clear)
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GROUND WATER BOREHOLE OBSERVATIONS SHEET
Date Observed ……………….. Res. Level at start ……………….. Time ………………..
Borehole No
PH52 OH64 ……………….. ……………….. PH51 OH59 ……………….. ……………….. PH27 OH58 ……………….. ……………….. PH28 OH65 ……………….. ……………….. PH24 OH66 ……………….. ……………….. PH25 OH67 ……………….. ……………….. PH56 PH48 ……………….. ……………….. PH57 PH31 ……………….. ……………….. WH143 PH49 ……………….. ……………….. PH33 PH50 ……………….. ……………….. PH34 OH70A ……………….. ……………….. PH46 OH71 ……………….. ……………….. PH47 OH78 ……………….. ……………….. OH62 OH79 ……………….. ……………….. OH63 OH83 ……………….. ……………….. OH61 OH84 ……………….. ……………….. OH60 OH85 ……………….. ……………….. OH74 OH86 ……………….. ……………….. OH73 PH87 ……………….. ……………….. OH75 PH89 ……………….. ……………….. OH72 PH90 ……………….. ……………….. OH76 PH91 ……………….. ……………….. OH69 PH92 ……………….. ……………….. OH68 ………………..
Res. Level at End ……………….. Time ………………..
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LOWER HUT PIEZOMETER READINGS SHEET
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UPPER HUT PIEZOMETER READINGS SHEET
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EXTENSOMETER READINGS SHEET
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