Koombooloomba Dam – Emergency Action Plan Document Number – CCQKAR-1075369619-12581

Business Procedure

Contents 1. RECORDS MANAGEMENT ...... 2 2. DISTRIBUTION LIST & COMMUNICATION PLAN ...... 4 3. REVIEW ...... 4 4. KOOMBOOLOOMBA DAM EAP - TELEPHONE NOTIFICATION LIST ...... 5 5. OBJECTIVE ...... 8 6. SCOPE ...... 8 7. DEFINITIONS ...... 10 8. ROLES & RESPONSIBILITIES ...... 13 9. PRINCIPAL FEATURES & PERTINENT INFORMATION ...... 14 10. FUNCTIONAL FLOWCHART ...... 16 11. AREA MAP ...... 17 12. STORAGE CATCHMENT AREA DRAWING ...... 18 13. DAM HAZARD ACTIVATION TABLES ...... 19 14. EVENT DATA ...... 44 15. LINKS AND REFERENCES ...... 50 APPENDIX A: DAM BREAK ANALYSIS ...... 51 APPENDIX B: DAM DATA ...... 62 APPENDIX C: SPILLWAY RATING CURVE ...... 67 APPENDIX D: KOOMBOOLOOMBA DAM STORAGE CAPACITY DATA ...... 68 APPENDIX E: STAGE HYDROGRAPHS AT KEY LOCATIONS ...... 69 APPENDIX F: INUNDATION PLOTS ...... 75 APPENDIX G: MODIFIED MERCALLI INTENSITY SCALE (EARTHQUAKE) ...... 99 APPENDIX H: POTENTIAL MATERIALS & EQUIPMENT SUPPLIERS ...... 101 APPENDIX I: KOOMBOOLOOMBA DAM EAP NOTIFICATION INFORMATION TEMPLATE ...... 102 APPENDIX J: KOOMBOOLOOMBA DAM EMERGENCY ALERT REQUEST FORM TEMPLATE ...... 103 APPENDIX K: KOOMBOOLOOMBA DAM EMERGENCY ALERT BOUNDARY POLYGON TEMPLATES ...... 105

UPDATED BY: ENODRSED BY: APPROVED BY:

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1.1 Document Control Sheet

CONTROLLED COPY NUMBER: 5

AUTHORISATION:

Approved by: Date: 1/11/2020

(Site Manager Kareeya Power Station, CleanCo Queensland)

REVISION STATUS: REVISION REVISION DESCRIPTION REVISION DATE 1 Initial Issue 14/06/95 2 Corporation Details and Phone Numbers Updated 08/07/98 3 Section on Dam Break Added 03/08/99 4 Updated to Current Format and Table of Contents Amended 17/08/01 5 Telephone Notification List Updated and Separate Revision 23/08/02 Position Title Updated in Emergency Events and Actions Pages Within Sections Numbered Independently 6 Telephone Notification List Updated and Separate Revision 22/11/04 Position Title Update in Emergency Events and Actions 7 Koombooloomba Dam Emergency Action Plan Reviewed and Amended 18/12/08 8 Communication Plan and Telephone Notification List Updated 04/02/09 9 Rubber Dam or Embankment Failure event scenario added and Telephone 14/12/09 Notification List Updated 10 Review carried out and copy included in Trim system 27/06/12 11 Reviewed & updated contacts list 1/01/14 12 Full review & rewrite; in accordance with format changes and regulator 30/06/14 recommendations 13 Reviewed & Updated contact list and actioned issues identified during approval 22/09/14 review 14 Reviewed and updated the contact list 23/09/15 15 Reviewed & Updated contact list and actioned issues identified during previous 23/08/16 approval review. Updated Emergency Event Action tables, included Storage capacity and Spillway rating curves and additional terms definitions. 16 Reviewed & Updated contact list and actioned issues identified and included in 20/06/17 ‘Schedule of Matters’ during previous approval review, updates in-line with (Dam Safety) Amendment Bill. 17 Reviewed & Updated contact list and actioned issues identified and included in 01/09/17 ‘Schedule of Matters’ during previous approval review, updates in-line with (Dam Safety) Amendment Bill. 18 Reviewed & Updated contact list as required 06/09/18 19 Reviewed & Updated contact list as required 19/09/19 20 Interim CleanCo transition version 1/11/2019 21 Minor updates 1/11/2020

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1.2 Telephone Notification List Control Sheet

CONTROLLED COPY NUMBER: 5

AUTHORISATION:

1/11/2020 Approved by: Date: (Site Manager Kareeya Power Station, (CleanCo Queensland)

This Control Sheet certifies that the Telephone Notification List of the Koombooloomba Dam Emergency Action Plan has been updated in accordance with the Standing Operating Procedure SOP07 to the authorities included in Section ‘Communication Plan’ of this Emergency Action Plan.

REVISION STATUS:

REVISION REVISION DESCRIPTION REVISION DATE 1 Initial Issue 23/08/02 2 Updated Contact Names and Numbers 22/11/04 3 Updated Contact Names and Numbers 22/05/06 4 Updated Contact Names and Numbers 17/12/08 5 Updated Contact Names and Numbers 04/02/09 6 Added SES All Areas Contact Number and Added 18/12/09 Embankment and Rubber Dam Failure Scenarios 7 Updated Contact Names and Numbers 24/02/10 8 Reviewed & updated Contact Names and Numbers 24/05/11 9 Reviewed Flood Commission Recommendations 25/12/11 10 Reviewed and updated contact names and Flood 25/06/12 Commission Recommendations 11 Updated with contacts list with comments from CCRC 1/01/14 and TRC LDMG’s and Sunwater 12 Updated contact list with the review for DNRME 30/06/14 13 Updated contact list for annual review 22/09/14 14 Updated contact list for annual review 23/09/15 15 Reviewed and updated information as required 23/08/16 16 Reviewed and updated information as required 20/06/17 17 Reviewed and updated information as required 01/09/17 18 Reviewed and updated as required 02/10/18 19 Reviewed and updated as required 19/09/19 20 Reviewed and updated as required 1/10/2020

Telephone Notification shall be approved by the Power Station Manager and certified separately in accordance with SOP’s and included following this section of this Emergency Action Plan.

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2. Distribution List & Communication Plan This procedure will be communicated in Controlled Copy Distribution as below:

Copy Position Location Number 1 Power Station Manager Kareeya Power Station 2 Kareeya On Call Officer Kareeya Power Station on-call Kit 3 Civil Engineer CleanCo Queensland 4 Chief Executive Officer CleanCo Queensland 5 Director Dam Safety Department of Natural Resources, Mines and Energy PO Box 15456, City East QLD 4002 6 District Disaster Co-ordinator Innisfail Police Station (Innisfail) P.O. Box 8, Innisfail 4860 7 Mareeba DDMG Executive Tablelands Patrol Group Headquarters. Officer (Mareeba) 178 Walsh Street, Mareeba 4880. or PO Box 1126, Mareeba 4880 8 Officer In Charge Tully Police Station 42 Bryant Street, TULLY QLD 4854 9 Officer In Charge Ravenshoe Police Station Grigg Street, RAVENSHOE QLD 4872 10 Local Disaster Coordinator Cassowary Coast Local Disaster Management Group PO Box 887, Innisfail QLD 4860 11 Local Disaster Coordinator Tablelands Local Disaster Management Group PO Box 573, Atherton QLD 4883 12 Watch Desk Officer, Disaster State Disaster Coordination Centre Management Services Unit - DMC Lvl 2, SDCC QFES C/O Watch Desk 125 Kedron Park Rd Kedron, 4031 13 Administration Officer Emergency Management, Queensland Fire and Emergency Services, Level 8, William McCormack Place, 5B Sheridan Street, Cairns QLD 4870 14 Cairns Police OIC Communications Centre Cairns Police Communications Centre, 5 Sheridan St, 4870 15 Koombooloomba Dam Copy Koombooloomba Dam Workshop 16 Corporate Communications CleanCo Queensland 17 Spot Market Manager CleanCo Queensland

3. Review

This Action Plan will be reviewed annually to comply with Water Supply (Safety and Reliability) Act 2008.

Section 4 has been redacted

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5. Objective To ensure personnel and public safety and safe management of the Koombooloomba infrastructure in emergency events.

6. Scope Ownership of Koombooloomba Dam was transferred to CCQ as of the 31st October 2019, and the dam was managed and operated under a transitional services agreement for CCQ by SCL until 31 August 2020. CCQ now own, manage and operate the dam. This EAP remains functionally unchanged.

This plan applies to CleanCo Queensland (CCQ) personnel, contractors, Emergency and Disaster Management Departments, Department of Natural Resources, Mines and Energy (DNRME) and Rafting companies operating on the Tully River. This EAP was developed in collaboration with the relevant LDMG’s, to confirm responsibilities, communication protocols and to ensure that this plan aligns with the LDMG plans and processes. This Emergency Action Plan will identify Emergency Events which are affected by or will affect Koombooloomba Dam or the downstream properties, providing actions and containing information to assist people involved with these actions. Itinerant river users immediately downstream of the dam who may be impacted by normal operational releases are warned of regular releases and varying river levels by signage at each river access point.

Six (6) Dam Hazards are identified for Koombooloomba Dam;

1 Heavy Rain in catchment area and rubber Dam inflated – May lead to uncontrolled discharge of water from spillway 2 Heavy Rain in catchment area and rubber Dam deflated – Uncontrolled discharge of water from spillway 3 Sudden deflation of rubber dam – Uncontrolled discharge of water from spillway

4 Increased leakage through embankment or embankment instability / failure – Extreme impact for downstream PAR *5 Earthquake – Possible spillway or embankment instability / failure, depending on location and magnitude. *6 Toxic or hazardous substance spill in catchment – Downstream impact on environment and river users

* Note: Acts of terrorism which could impact Koombooloomba Dam have been assessed as having Low probability, but to effectively control the unlikely event of a terrorist act the following scenarios have been identified as possible and actions considered as appropriate; - A terrorist threat is received by CCQ staff: CCQ response processes to Incidents and Crisis are detailed in the Emergency Response Guide – Kareeya Power Station (Red Folder) 13/1362524 and the Crisis Management Plan (ref). These documents clearly define the Roles and Responsibilities when a Crisis or Incident is declared. The Crisis Event Evaluation and Escalation process (ref) provides an outline of how these processes interact. - Attack on the dam spillway or embankment by explosive device, impact from aircraft or other airborne devices; this scenario has the possibility of causing spillway or embankment instability and will instigate a response action in line with Dam Hazard #5 for the dam – as above. - Attack on the dam reservoir by way of poisoning or contamination by toxic substance; this scenario will impact communities and environmental eco-systems downstream of the dam, this will instigate a response action in line with Dam Hazard #6 for the dam – as above. - Attack on the operating equipment or systems controlling the dam; this scenario will not instigate an emergency response as it will not impact downstream communities, but it will impact the operations of the Kareeya Power Station and may cause minor impact to the Electricity Network, this will be responded to in accordance with CCQ terrorism policy and procedures. In all instances where an act of terrorism is suspected or confirmed, the KPSM will contact the National Security Hotline, local counter-terrorism authority and GM Performance Risk and Finance to activate CCQ response.

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KPSM will act on advice from these authorities as appropriate for the situation, all actions will be undertaken only if / when it is safe to do so!

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7. Definitions 7.1 Acronyms;

AMTD: Adopted Middle Thread Distance, the distance in kilometres, measured along the middle of a watercourse that a specific point in the watercourse is from the watercourse’s mouth.

CC: Cassowary Coast (LDMG).

CCQ: CleanCo Queensland

CEO: Chief Executive Officer, CleanCo Queensland.

CleanCo: CleanCo Queensland (CCQ)

DDMG: District Disaster Management Group

EA: Emergency Alert – System used by Queensland Emergency Services to warn communities of impending emergency, the system uses telephone voice messages and mobile SMS messaging to reach all devices in a specific location bounded by formatted Polygons.

GM: General Manager, CleanCo Queensland.

EER: Emergency Event Report.

FSL: Full Supply Level.

KPSM: Kareeya Power Station Manager.

LDMG: Local Disaster Management Group.

OCO: On Call Officer.

O&MP: Operational and Maintenance Personnel.

PAR: Population at Risk – downstream residents who may be impacted by events from the dam. All PAR for Koombooloomba Dam are rural lots located within the Cassowary Coast Local Disaster Management Group area.

PMPDF: Probable Maximum Precipitation Design Flood – the theoretical greatest depth of precipitation for a given duration that is physically possible over a particular drainage system.

QPS: Queensland Police Service.

U/S: Upstream

SCL: Stanwell Corporation Limited

SDF: Sunny Day Failure – an unexpected failure of a dam not associated with flooding but may be initiated by natural disaster.

SMS: Short Message Service – text messaging service for mobile phone devices.

SOP: Standing Operating Procedure.

TRC: Tablelands Regional Council (LDMG).

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7.2 Terms and definitions

Terms set out in section 352A of the Water Supply (Safety and Reliability) Act 2008 (Qld)

Term Definition

Dam Hazard for a dam, means a reasonably foreseeable situation or condition that may; (a) Cause or contribute to the failure of the dam, if the failure may cause harm to persons or property; or (b) Require an automatic or controlled release of water from the dam, if the release of the water may cause harm to persons or property.

Dam hazard event for a dam, means an event arising from a dam hazard if; (a) persons or property may be harmed because of the event; and (b) a coordinated response involving 2 or more of the relevant entities mentioned in paragraphs (b) to (d) of the definition relevant entity is unlikely to be required to respond to the event; and (c) the event is not an emergency event.

Emergency event for a dam, means an event arising from a dam hazard if; (a) Persons or property may be harmed because of the event; and (b) Any of the following apply— (i) A coordinated response involving 2 or more of the relevant entities mentioned in paragraphs (b) to (d) of the definition relevant entity is likely to be required to respond to the event; (ii) The event may arise because of a disaster situation declared under the Disaster Management Act; (iii) An entity performing functions under the State disaster management plan may, under that plan, require the owner of the dam to give the entity information about the event.

Terms used with notifications;

Term Definition Advise To give advice or recommend particular actions or to give information. Notify To inform (someone) or to give or impart knowledge of a fact or circumstance. Warn To give a warning or to give notice, advice, or intimation to (a person, group, etc.) of danger.

7.3 Activation Levels This EAP is activated using an escalation model based on the following 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. Stand Up – The operational state where resources are mobilised, personnel are activated, and operational activities commenced. 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.

The triggering of one of these levels of activation may not necessarily mean a similar activation of Disaster Management Groups.

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7.4 Bureau of Meteorology Flood Level Classifications –

Minor Flooding: This causes inconvenience such as closing of minor roads and the submergence of low-level bridges and makes the removal of pumps located adjacent to the river necessary. Moderate Flooding: This causes the inundation of low-lying areas requiring the removal of stock and/or the evacuation of some houses. Main traffic bridges may be closed by flood waters. Major Flooding: This causes inundation of large areas, isolating towns and cities. Major disruptions occur to road and rail links. Evacuation of many houses and business premises may be required. In rural areas widespread flooding of farmland is likely

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8. Roles & Responsibilities 8.1 On-Call Officer • First point of contact during out-of-hours events, • Initiate contact with KPSM, • Monitor situation as per Emergency Event Table or as KPSM directs until hand over to Forward Commander, • Handover duties to Forward Commander when directed by KPSM

8.2 Forward Commander • Attendance at the dam for an emergency event, if safe to do so (e.g. prevented by flood waters) remote monitoring by CCTV and SCADA will be required if unable to attend site. • For an Earthquake event, assist KPSM to make an assessment of earthquake intensity using the Modified Mercalli Scale – attached as Appendix G, • Make inspections of dam infrastructure, • Report to KPSM. • Advise emergency services organizations if required, • Assist to notify recreational river users and campers as directed by KPSM, • Record data from the event and submit an emergency event report whenever an emergency event occurs,

8.3 Operational & Maintenance Personnel • Safely maintain KPS operations during event as directed by KPSM • Assist to notify recreational river users and campers as directed by KPSM, • Instigate any repairs to the dam as required.

8.4 Kareeya Power Station Manager • Responsible for initiating EAP activation at Alert Level, escalation of events and standing down following an event resolution • Forward copy of emergency event reports for all events as identified in this EAP where the EAP is activated, to the Director Dam Safety, DNRME within 30 days of an event. • Maintain contact with Forward Commander for duration of emergency event, • Advise Emergency Services organizations as required, • Advise CCQ, • Arrange materials and equipment to site if required for urgent repair work. A list of potential suppliers is attached as Appendix G, • Ensure maintenance and testing of emergency alarms in accordance with SOP’s, • Training of OCO, Forward Commander and assistant personnel in accordance with SOP’s, • Testing and exercising EAP in accordance with SOP’s.

8.5 LDMG’s • Maintain communication with KPSM, • Determine activation level for LDMG. • Liaise with Local authorities for notification actions. • Notify any affected downstream PAR as required, (Utilise Emergency Alert System.) • Initiate action plans for flood affected residence.

8.6 Local Authorities • Liaise with LDMG for downstream notification actions • Monitor actions at dam • Assist and advise KPSM & LDMG’s as required.

Note: CCQ response processes to Incidents and Crisis are detailed in the Emergency Response Guide – Kareeya Power Station (Red Folder) 13/1362524 and the Crisis Management Plan. These documents clearly define the Roles and Responsibilities when a Crisis or Incident is declared. The Crisis Event Evaluation and Escalation process provides an outline of how these processes interact.

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9. Principal Features & Pertinent Information

9.1 General Department of Energy and Water Supply Identification Number - 1510 Incremental Flood Hazard Category - High A Sunny Day Failure Hazard Category - High A Current Owner - CleanCo Queensland Current Operator - CleanCo Queensland Original Owner - Tully Falls Hydro Board Designer - Co-ordinator General’s Department Year Constructed - 1960 Purpose - Hydro-electric Power Station Water Storage Construction type - Central mass concrete spillway with flanking earth-rockfill embankments and two separate saddle dam embankments Location - 150 km southwest of Innisfail Stream - Tully River, AMTD 99.1 km Position - (Latitude / Longitude) 17°50´ S / 145°36´ E Access – Sealed and gravel road (Approx. 35Km) from Ravenshoe or Via cableway from Kareeya Power Station, then for 17 km by sealed & gravel road to the left abutment Emergency Power - Permanent Diesel Gen Set (82 KVA)

9.2 Storage Catchment Area - 163 km2 Full Supply Level (FSL) Low fixed concrete crest level - EL 740.36 m Full Supply Level (FSL) Rubber Dam inflated - EL 742.19 m Storage Capacity (FSL) - 216,600 ML Surface Area (FSL) - 1,600 ha

9.3 Main Embankment Type - Zoned earth and rockfill Crest level - EL 746.8 m Maximum height above natural ground - 40 m Crest Length (including spillway) - 393 m

9.4 Spillway Type - Concrete gravity ogee crest with water filled rubber dam Location - Centrally within main embankment Fixed Crest Level - Auxiliary flow section (14.3 m wide) - EL 740.664 m Main flow section (46 m wide) - EL 740.359 m Height above U/S bed level – 39 m Crest length - 60.3 m Discharge capacity at DCL (EL 746.8 m) - 2,120 m3/s* * Refer to Koombooloomba Dam Acceptable Flood Capacity Assessment – April 2010

9.5 Inflatable Rubber Dam Type - Water Filled Manufacturer - Trelleborg Qld. Rubber Date installed October 2001 Crest level (fully inflated) - EL 742.188 m Crest level (dry weather height) - EL 740.998 m Length - 60.3 m Maximum height - 1.83 m Wall thickness - 13 mm

9.6 Non-overflow Abutments Type - Concrete gravity monoliths Crest level - EL 746.8 m Maximum height above lowest foundation level - 46 m

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9.7 South Saddle Dam Type - Homogeneous earthfill embankment Crest level - EL 746.9 m Maximum height above foundation level - 17 m Crest length - 384 m

9.8 North Saddle Dam Type - Homogeneous rockfill embankment Crest level - EL 747.14 m Maximum height above foundation level - 2 m Crest length - 150 m

9.9 Appurtenant Works 9.9.1 Outlet Works Type - Outlet conduit through the Gate House Monolith with trashrack intake and fixed wheel baulks for emergency closure Location - Left abutment Control - 2 x 1.8 m diameter fixed cone dispersion valves, Emergency fixed-wheel bulkhead gate Minimum drawdown level - EL 710.6 m Maximum discharge capacity at FSL (both valves open) - 86 m3/s

9.9.2 Workshop Shed & Accommodation Amenities Emergency power – Permanent Diesel Genset (18KVA) Cyclone rated Accommodation and rations for 2 persons during EAP activation if required. Area for Helicopter evacuation if required.

9.10 Site Geology The site geology in the vicinity of the dam consists mainly of rhyolites and trachytes with granite outcrops. The foundation of the dam consists of continuous solid, unweathered rock in an undulating plane at approximately EL 701 m.

9.11 Communication Normal communication – CCQ PABX. Located in gatehouse and Koombooloomba Hydro (K5). Standby communication – Two-way VL4EC N/A. Base stations located in gatehouse and Dam workshop. Emergency Communication – Satellite phone, Vodaphone. Located at Kareeya Power Station. Satellite phone in each CCQ vehicle. Radio to Phone connection from all two-way radios.

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10. Functional Flowchart

Inputs Provide public awareness Routine Inspections Kareeya SCADA Inputs from BOM Remote alarms announcements.

CC LDMG & TRC LDMG- Liaise with KPSM & local Actions authorities, Actions IAW Event Activation Level Activation level table.

Forward Commander and assistant attend Local Authorities –Police, Fire, SES Event identified; Dam, assess situation, report to KPSM, fill EAP activated by KPSM- & DDMG’s 1, 2, 3, 4, 5, or 6, out Reservoir Level Data Sheet, Operate Monitor / Prepare Rubber Dam, Maintain log of actions / Alert, Activation Level communications. Downstream PAR & Recreational River users. OCO to notify GM Asset Operations if KPSM unavailable Forward Commander and assistant KPSM notifies appropriate Local Council Environmental teams Event Escalates; Lean monitor situation, report to KPSM, fill out Reservoir Level Data Sheet, assist notifying agencies. Actions IAW Event forward / Stand Up, river users, carry out preventative / Activation Level table CCQ Community and Stakeholder Activation Levels maintenance actions as directed, Maintain log of actions / communications. Engagement Team

KPSM notifies appropriate agencies. Compile and file all Director Dam Safety, DNRME Forward Commander and assistant to Event De-escalates; event communications and compile an Emergency Event Report reports, Forward EER to Director Stand Down, Activation forward to KPSM, check for damage, carry Dam Safety within 30 days Level out repairs as directed.

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11. Area Map

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12. Storage Catchment Area Drawing

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13. Dam Hazard Activation Tables

* Notes: 1. Ensure appropriate steps in section ’Action: Operation – Flood Condition’ of Koombooloomba Dam Operation and Maintenance Manual have been completed. 2. Operational releases from the Dam Regulators and Koombooloomba Hydro will only affect the river heights above Tully Falls Diversion Weir and would be contained within the banks of the river unless they are in conjunction with one of the below Dam Hazards / Emergency Events, signage warning of the regular water discharges and varying water levels are positioned at each river access point below the dam. 3. Release of water from the Spillway and Flood mitigation releases from the dam of both regulators and K5 at maximum discharge which can be up to half of the flow rate of Rubber dam breach are addressed in Dam Hazard Activation Tables 1,2 & 3. 4. Road conditions to access the Dam are a very significant factor to consider when deciding on mobilisation of a team to the dam. If able, the KPSM shall mobilise before road conditions prevent road access. 5. Contingency plans shall be established if attendance at the dam is inaccessible or unadvisable due to adverse weather / flooding or danger to KPS personnel. 6. Utilise ‘Notification Information Template’ at Appendix I, during all stakeholder notification communications to ensure continuity and accuracy of information. 7. Pre-approved EA Request forms (Appendix J) will be utilised for notification of downstream PAR with corresponding preformed notification polygons (Appendix K) 8. Acts of terrorism which could impact Koombooloomba Dam have been assessed as having Low probability, but to effectively control the unlikely event of a terrorist act the following scenarios have been identified as possible and actioned considered as appropriate; - A terrorist threat is received by CCQ staff: CCQ response processes to Incidents and Crisis are detailed in the Emergency Response Guide – Kareeya Power Station (Red Folder) 13/1362524 and the Crisis Management Plan (ref). These documents clearly define the Roles and Responsibilities when a Crisis or Incident is declared. The Crisis Event Evaluation and Escalation process (ref) provides an outline of how these processes interact. - Attack on the dam spillway or embankment by explosive device, impact from aircraft or other airborne devices; this scenario has the possibility of causing spillway or embankment instability and will instigate a response action in line with Dam Hazard #5 for the dam. - Attack on the dam reservoir by way of poisoning or contamination by toxic substance; this scenario will impact communities and environmental eco-systems downstream of the dam, this will instigate a response action in line with Dam Hazard #6 for the dam. - Attack on the operating equipment or systems controlling the dam; this scenario will not instigate an emergency response as it will not impact downstream communities but it will impact the operations of the Kareeya Power Station and may cause minor impact to the Electricity Network, this will be responded to in accordance with CCQ terrorism policy and procedures. - In all instances where an act of terrorism is suspected or confirmed, the KPSM will contact the National Security Hotline, Local Counter-Terrorism Authority and GM Performance Risk and Finance to activate CCQ response. KPSM will act on advice from these authorities as appropriate for the situation, all actions will be undertaken only if / when it is safe to do so.

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13.1 Dam Hazard Event - Heavy Rainfall in the Koombooloomba Dam Catchment with Rubber Dam Inflated Scenario Conditions – Storage exceeds full supply level of EL 742.19m (CCQ Datum 30.48m / 100%) i.e. top of the rubber dam fully inflated, and water level still rising. Note – This event is most likely to occur towards the end of the Tropical North Queensland wet season (February to May) as the dam level is drawn down throughout the year to very low level prior to the start of the wet season.

Activation Level Table Dam Hazard #1.

Inundation Map reference; TRC Area: F1 – Overview F3 – Inundation area CCRC Area: F2 – Overview F6 to F9 – Inundation Area

13.1.1. ALERT

Activation indicators and General Characteristics – Heavy inflows from rainfall event in the dam catchment area, Storage level at EL 740.998 (CCQ Datum 29.28m identified on Kareeya SCADA and confirmed by CCTV and physical measurement at Dam) top of the rubber dam dry weather height or above, and water level still rising with predicted further heavy rainfall.

ALERT Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Record the Reservoir level on the Reservoir Level • Discuss situation at dam with Forward Stakeholders. Data Sheet daily or as instructed by KPSM. Commander • No Action required. • Notify KPSM via radio / phone as requested or if • Calculate inflows / Outflows changes to situation occur. • Request weather forecast updates from BOM CCQ Emergency Incident team • All data to be entered on the Reservoir Level Data • Review current KPS operations, liaise with CCQ • Carry out internal notification as required Sheet. Duty Spot Market Trader • Follow the Rubber Dam Operation & Maintenance • Review KPS / dam staffing levels in view of Manual for the operation of the inflatable rubber possible condition escalation dam on top of the spillway as water level rises. • Contact via phone General Manager Asset • Inspect dam for signs of distress daily or as Operations or GM Performance Risk and instructed by KPSM, notify KPSM of any issues. Finance – Notify of EAP Activation

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Dam Hazard Event -– Heavy Rainfall in the Koombooloomba Dam Catchment with Rubber Dam Inflated

13.1.2 LEAN FORWARD

Activation indicators and General Characteristics – Continued heavy inflows from rainfall event in the dam catchment area, Storage Approaching full supply level of EL 742.19 (CCQ Datum 30.48m / 100%) top of the rubber dam fully inflated. KPS O&MP have followed rubber dam inflation with storage level rise. Note – if cyclone or heavy monsoon rain predicted, rubber dam will be lowered before reaching top of fully inflated

LEAN FORWARD Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Record the Reservoir level on the Reservoir Level • Discuss situation at dam with Forward Commander Stakeholders. Data Sheet daily or as instructed by KPSM. • Calculate inflows / Outflows LDMG’s • Follow the Rubber Dam Operation & Maintenance • Request weather forecast updates from BOM • Consider impact to downstream PAR of Manual for the operation of the inflatable rubber • Review current KPS operations, liaise with CCQ flood mitigation releases from dam, Notify dam on top of the spillway. Duty Spot Market Trader recreational river users as required, if • Notify KPSM of Rubber Dam inflation level at • Initiate actions to reduce pressure on Dam possible. each inflation operation. • Review KPS / dam staffing levels in view of possible • Activate appropriate LDMG agencies to 1. With direction from KPSM - Attempt to control condition escalation manage situation. rising reservoir levels with regulators and K5 • Move to Dam Hazard Activation Table # 3 -– S.13.3 Commercial River Operators • Move to Dam Hazard Activation Table # 3 -– if problems are identified with rubber dam. • Notify operations staff of situation and S.13.3 if problems are identified with rubber dam. • Make contact with LDMG of TRC and CC. review river emergency plans / actions. • Record all relevant data on the Emergency Action • Phone Commercial River operators and notify of Plan Event Data Information Sheets, Keep a daily Dam level and possible spillway releases. running record of all actions / events and • Phone / email CCQ CEO (or responsible GM if the telephone calls. CEO cannot be contacted) – Notify and update on • Inspect dam for signs of distress daily or as situation (and advise that LDMG agencies are instructed by KPSM, notify KPSM of any issues. being activated to manage the situation)

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Emergency Event - Heavy Rainfall in the Koombooloomba Dam Catchment with Rubber Dam Inflated

13.1.3 STAND UP

Activation indicators and General Characteristics – Dam storage has passed full supply level of EL 742.19m (CCQ Datum 30.48m / 100%) top of the rubber dam fully inflated and water level still rising.

STAND UP Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Record the Reservoir level on the Reservoir Level • Advise the following contacts daily via phone Stakeholders. Data Sheet twice daily or as instructed by KPSM. unless otherwise specified (use communication • Record correspondence with KPSM. • Advise the KPSM every 4 hours of the situation at template – Appendix I); or as often as requested, • Monitor situation at Dam. the dam if the Reservoir level continues to rise. of the Reservoir level as it continues to rise to it’s • CC LDMG initiate action plan for down Continue control measures to control rising reservoir peak and if any changes to the event stream PAR, Forward request for levels with regulators characteristics occur (or as otherwise agreed): Emergency Alert System from KPSM. • With consultation with KPSM shutdown K5 1 - Police Communications Centre Cairns • TRC LDMG initiate action plan for • Report any unusual findings immediately to the 2 - District Disaster Co-ordinator and LDMG, recreational river users below dam if KPSM. Cassowary Coast and Tablelands Regional Councils. required in consultation with KPSM and • If the Reservoir level reaches EL 742.49m (CCQ 3 – Request by email, use of EA system – utilise Police. Datum 30.78m) deflate the rubber dam, move to Template #1 with Polygon #1 (Appendix J1 & K1) • Review actions for flood affected Dam Hazard Activation Table #2 – S.13.2.2 Lean through CC LDMG for notification of downstream residence downstream. Forward Level, notify KPSM. PAR. • Activate appropriate LDMG agencies to • If an embankment failure occurs or is imminent move 4 - Dispatch staff to warn recreational river users and manage situation. immediately to Dam Hazard Activation Table #4 – campers above Tully River Bridge, S.13.4.3 Stand Up level, Notify KPSM 5 - Director Dam Safety (Water Supply), DNRME • Record all relevant data on the Emergency Action 6 - CCQ Community and Stakeholder Engagement Plan Event Data Information Sheets, Keep a daily Team (Corporate Communications) running record of all actions / events and telephone 7 – CCQ CEO (or responsible GM if the CEO cannot calls be contacted) – Update on situation • • Twice daily, inspect the embankment and South Shutdown K5 to avoid damage to plant, review Saddle Dam for springs, deformation and signs of KPS operations in view of current situation erosion. • Obtain rainfall forecast from the Bureau of Meteorology (BOM) and track progress and effects of flood. • If the Reservoir level reaches EL 742.49m (CCQ Datum 30.78m) deflate the rubber dam and move to Dam Hazard Activation Table #2 – S.13.2.2 Lean Forward Level. If an embankment failure occurs or is imminent move immediately to Dam Hazard Activation Table #4 – S.13.4.3 Stand Up level. Doc No: CCQKAR-1075369619-12581 Revision No: Revision Date: Page: 22 of 116 21 1/10/2020 THIS DOCUMENT IS UNCONTROLLED IN HARD COPY FORMAT

Emergency Event – Heavy Rainfall in the Koombooloomba Dam Catchment with Rubber Dam Inflated

13.1.4 STAND DOWN

Activation indicators and General Characteristics – Heavy rainfall in the dam catchment has ceased, Reservoir level drops to EL 742.19m (CCQ Datum 30.48m / 100%) top of the rubber dam fully inflated and river flood levels falling.

STAND DOWN Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Check for any damage to dam walls, banks and • Notify by phone or email the following personnel of Stakeholders. structures. the event conclusion; • If required undertake special inspection of dam as 1 - Police Communications Centre Cairns ALL per SOP 22. 2 - District Disaster Co-ordinator and LDMG, • Record correspondence with KPSM. • Compile an Emergency Event Report as detailed in Cassowary Coast and Tablelands Regional Councils. • Notify all previously contacted the Emergency Action Plan Event Data Information 3 - Director Dam Safety (Water Supply), DNRME downstream PAR of event conclusion. Sheet and forward a copy to KPSM 4 - CCQ Crisis Leader (if Crisis Leadership Team has • Review and record any actions taken • been activated) or Incident Manager (if Incident with flood affected residence Management Team has been activated) downstream.

• File the information in the relevant medium and forward copy of emergency event reports to the Director Dam Safety (Water Supply), DNRME within 30 days of event.

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13.2 Dam Hazard Event - Heavy Rainfall in the Koombooloomba Dam Catchment with Rubber Dam Deflated Scenario Conditions – Reservoir level at EL 742.00 (CCQ Datum 30.3m / 97%) with rubber dam deflated and rising to the Maximum previously recorded flood level of EL 742.51m on 27 February 2011, with rubber dam deflated and water level still rising. Note – This event is most likely to occur towards the end of the Tropical North Queensland wet season (February to May) as the dam level is drawn down throughout the year to very low level prior to the start of the wet season.

Activation Level Table Dam Hazard #2

Inundation Map reference; TRC Area: F1 – Overview F3 – Inundation area (Flood level up to EL742.49) F5 – Inundation Area (Flood level over EL742.49) CCRC Area: F2 – Overview F6 to F9 – Inundation Area (Flood level up to EL742.49) F16 to F23 – Inundation Area (Flood level over EL742.49)

13.2.1 ALERT

Activation indicators and General Characteristics – Heavy inflows from rainfall event in the dam catchment area, Reservoir level approaching EL 742.00 (CCQ Datum 30.3m / 97% identified on Kareeya SCADA and confirmed by CCTV and physical measurement at Dam) with rubber dam deflated and rising with further extreme weather events predicted for the dam catchment area. Decision is made not to inflate rubber dam due to predicted extreme weather.

ALERT Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Report as requested by KPSM or if changes to • Discuss situation at dam with Forward Commander Stakeholders. situation occur. • Calculate inflows / Outflows • No Action required. • Record the Reservoir level on the Reservoir Level • Request weather forecast updates from BOM Data Sheet daily or as instructed by KPSM. • Review current KPS operations, liaise with CCQ • Inspect dam daily for signs of distress, notify KPSM Duty Spot Market Trader CCQ Emergency Incident team of any issues. • Review KPS / dam staffing levels in view of • Carry out internal notification as required possible condition escalation • Contact via phone or email General Manager Asset Operations or GM Performance Risk and Finance – Notify of EAP Activation.

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13.2.2 LEAN FORWARD Emergency Event – Heavy Rainfall in the Koombooloomba Dam Catchment with Rubber Dam Deflated Activation indicators and General Characteristics – Continued heavy inflows from rainfall event in the dam catchment area, Reservoir level beyond EL 742.00 (CCQ Datum 30.3m / 97%), rubber dam deflated with level rising. Dam level rise not able to be controlled by use of Regulators.

LEAN FORWARD Actions and notifications in order of precedence Dam Site KPS External Agencies & CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Record the Reservoir level on the Reservoir Level • Discuss situation at dam with Forward Commander Stakeholders. Data Sheet twice daily or as instructed by KPSM. • Calculate inflows / Outflows / Spill volumes LDMG’s • Notify KPSM twice daily or as changes occur. • Request weather forecast updates from BOM • Consider impact to downstream PAR 2. With direction from KPSM - Attempt to control rising • Review current KPS operations including K5, liaise of flood mitigation releases from dam, reservoir levels with regulators and K5. with CCQ Duty Spot Market Trader Notify recreational river users as • Record all relevant data on the Emergency Action • Initiate actions to reduce pressure on Dam required, if possible. Plan Event Data Information Sheets, Keep a daily • Review KPS / dam staffing levels in view of possible • Activate appropriate LDMG agencies running record of all actions / events and telephone condition escalation to manage situation. calls. • Contact Commercial River operators, request • CC LDMG initiate action plan for • Inspect dam daily for signs of distress, notify KPSM numbers on river downstream PAR, Forward request for of any issues twice daily. • Contact via phone unless otherwise indicated, the Emergency Alert System from KPSM. following agencies in order of priority and advise of situation at Dam (use communication template – Commercial River Operators Appendix I); • Notify operations staff of situation and 1 - Police Communications Centre Cairns review river emergency plans / actions. 2 - District Disaster Co-ordinator and LDMG, Cassowary Coast and Tablelands Regional Councils. 3 – Request via email, use of EA system – utilise Template #1 with Polygon #1 (Appendix J1 & K1) through CC LDMG for notification of downstream PAR. 4 - Dispatch staff to notify recreational river users and campers above Tully River Bridge, 5 - Director Dam Safety (Water Supply), DNRME 6 - CCQ CEO (or responsible GM if the CEO cannot be contacted) – Notify and update on situation (and advise that LDMG agencies are being activated to manage the situation) • Maintain communication with stakeholders as requested by agencies or as changes occur at Dam

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Emergency Event - Heavy Rainfall in the Koombooloomba Dam Catchment with Rubber Dam Deflated

13.2.3 STAND UP

Activation indicators and General Characteristics – Reservoir level reaches Maximum previously recorded flood level of EL 742.51m i.e. EL 742.51m on 27 February 2011, with rubber dam deflated and water level still rising.

STAND UP Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Record the Reservoir level on the Reservoir Level • Contact the following agencies via phone unless Stakeholders. Data Sheet every 4 hours or as instructed by otherwise indicated, in order of priority and warn of • Record correspondence with KPSM. KPSM. situation at Dam (use communication template – • Monitor situation at Dam. • Advise the KPSM every 4 hours of the situation at Appendix I); • CC LDMG initiate action plan for the dam if the Reservoir level continues to rise. 1 - Police Communications Centre Cairns downstream PAR, Forward request for Continue control measures to control rising 2 - District Disaster Co-ordinator and LDMG, Cassowary Emergency Alert System from KPSM. reservoir levels with regulators Coast and Tablelands Regional Councils. • TRC LDMG Review / initiate action plan • With consultation with KPSM shutdown K5 3 - Request via email, use of EA system – utilise for recreational river users below dam as • If an embankment failure occurs move Template #1 with Polygon #3 (Appendix J1 & K1) required (if possible, “if it’s flooded forget immediately to Dam Hazard Activation Table #4 – through CC LDMG for notification of downstream PAR it”) in consultation with KPSM and S.13.4.3 Stand Up Level, Notify KPSM 4 - Dispatch staff to warn recreational river users and Police. • Record all relevant data on the Emergency Action campers above Tully River Bridge, • Review actions for flood affected Plan Event Data Information Sheets, Keep a daily 5 - Director Dam Safety (Water Supply), DNRME residence downstream. running record of all actions / events and telephone 6 - CCQ Community and Stakeholder Engagement Team • Activate appropriate LDMG agencies to calls (Corporate Communications) manage situation. • Twice daily, Inspect dam for signs of distress, 7 – CCQ CEO (or responsible GM if the CEO cannot be notify KPSM of any issues. contacted) – Update on situation • Report any unusual findings immediately to the • Shutdown K5 if not previously done to avoid damage KPSM. to plant, review KPS operations in view of current situation • Obtain rainfall forecast from the Bureau of Meteorology (BOM) and track progress and effects of flood. • If an embankment failure occurs or is imminent move immediately to Dam Hazard Activation Table #4 – S.13.4.3 Stand Up Level • Maintain communication with stakeholders as requested by agencies or as changes occur at Dam

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Emergency Event - Heavy Rainfall in the Koombooloomba Dam Catchment with Rubber Dam Deflated

13.2.4 STAND DOWN

Activation indicators and General Characteristics – Reservoir level drops to EL 742.00 (CCQ Datum 30.3m / 97%) with rubber dam deflated and falling.

STAND DOWN Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • If required undertake special inspection of dam as • Notify via phone / email the following agencies of Stakeholders. per SOP 22. the event conclusion; • Compile an Emergency Event Report as detailed in 1 - Police Communications Centre Cairns ALL the Emergency Action Plan Event Data Information 2 - District Disaster Co-ordinator and LDMG, • Record correspondence with KPSM. Sheet and forward a copy to the KPSM Cassowary Coast and Tablelands Regional Councils. • Notify all previously contacted • Inspect dam for signs of distress, notify KPSM of any 3 - State Emergency Services downstream PAR of event conclusion, issues. 4 - Director Dam Safety (Water Supply), DNRME make damage assessment. • Check for any damage to dam walls, banks and 5 – CCQ Crisis Leader (if Crisis Leadership Team has • Review and record any actions taken with structures. been activated) or Incident Manager (if Incident flood affected residence downstream. Management Team has been activated)

• File the information in the relevant medium and forward copy of emergency event reports to the Director Dam Safety (Water Supply), DNRME within 30 days of event. • Liaise with Principle Civil Engineer for any immediate repairs or structural damage of the dam

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13.3 Dam Hazard Event - Sudden Deflating of the Rubber Dam Scenario Conditions – Rubber dam suddenly deflates with level greater than EL 742.00 (CCQ Datum 30.3m / 97%). Note – This event is most likely to occur towards the end of the Tropical North Queensland wet season (February to May) when the dam is at it’s highest level for the year, as the dam level is drawn down throughout the year to very low level prior to the start of the wet season.

Activation Level Table Dam Hazard #3.

Inundation Map reference; TRC Area: F1 – Overview F3 – Inundation area CCRC Area: F2 – Overview F6 to F9 – Inundation Area

13.3.1 ALERT

Activation indicators and General Characteristics – Reservoir level at or above EL 742.00 (CCQ Datum 30.3m / 97% identified on Kareeya SCADA) with rubber dam inflated. Sudden drop in reservoir level noticed or fault in rubber dam identified.

ALERT Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team On Call Officer (First contact Out of Hours), Forward KPSM or Delegate LDMG’s, Local Authorities and External Commander & Assistant • Dispatch Forward Commander to review situation Stakeholders. • Immediately confirm an abnormality with water at Dam • No Action required. levels on KPS SCADA / PIMS and via the Closed • Discuss findings at dam with Forward Circuit Television (CCTV) at the Spillway. Commander • Report to KPSM via radio / phone, situation at dam. • Review current KPS operations, liaise with CCQ CCQ Emergency Incident team • All data to be entered on the Reservoir Level Data Duty Spot Market Trader • Carry out internal notification as required Sheet. • Review KPS / dam staffing levels in view of • . possible condition escalation • Contact General Manager Asset Operations or GM Performance Risk and Finance – Notify of EAP Activation.

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Emergency Event - Sudden Deflating of the Rubber Dam

13.3.2 LEAN FORWARD Activation indicators and General Characteristics – Confirmed breach of the Rubber Dam is in progress or imminent.

LEAN FORWARD Actions and notifications in order of precedence Dam Site KPS External Agencies & CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • IMMEDIATELY advise the KPSM that a failure of the • Discuss situation at dam with Forward Stakeholders. rubber dam is in progress or imminent and report the Commander LDMG’s storage level as often as requested to. • Review current KPS operations including K5, liaise • Consider impact to downstream PAR of • Warn recreational river users immediately below with CCQ Market Trading Team flood mitigation releases from dam, warn dam in person, and advise any watercraft on the • Initiate actions to reduce pressure on Dam recreational river users as required. dam of the situation where possible • Phone Commercial River operators, request • Activate appropriate LDMG agencies to • Record the Reservoir level on the Reservoir Level numbers on river manage situation. Data Sheet as instructed by KPSM. • Contact the following agencies via phone unless • CC LDMG initiate action plan for • Record all relevant data on the Emergency Action otherwise indicated, in order of priority and advise downstream PAR, Forward request for Plan Event Data Information Sheets, Keep a daily of situation at Dam (use communication template Emergency Alert System from KPSM. running record of all actions / events and telephone – Appendix I); • TRC LDMG Review / initiate action plan calls 1 - Police Communications Centre Cairns for recreational river users below dam as • Carry out actions to reduce pressure on the Rubber 2 - District Disaster Co-ordinator and LDMG, required (if possible, “if it’s flooded forget Dam, Open regulators. Cassowary Coast and Tablelands Regional Councils. it”) in consultation with KPSM and Police. • Begin to deflate Rubber Dam 3 – Request via email, use of EA system – utilise Template #1 with Polygon #1 (Appendix J1 & K1) Commercial River Operators through CC LDMG for notification of downstream PAR • Notify operations staff of situation and 4 - Dispatch staff to warn recreational river users and review river emergency plans / actions. campers above Tully River Bridge, 5 - Director Dam Safety (Water Supply), DNRME Police 6 - CCQ CEO (or responsible GM if the CEO cannot • Assist with warning recreational river be contacted) – Notify and update on situation (and users. advise that LDMG agencies are being activated to manage the situation) All • Maintain communications with KPSM. • Maintain communication with stakeholders as requested by agencies or as changes occur at Dam

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Emergency Event - Sudden Deflating of the Rubber Dam

13.3.3 STAND UP

Activation indicators and General Characteristics – Confirmed failure of the Rubber Dam and uncontrolled release of water over the spillway.

STAND UP Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Record the Reservoir level on the Reservoir Level • Contact the following agencies via phone unless Stakeholders. Data Sheet as instructed by KPSM. otherwise indicated, in order of priority and warn of • Record correspondence with KPSM. • Advise the KPSM every 4 hours of the situation at situation at Dam (use communication template – • Monitor situation at Dam. the dam. Continue control measures to reduce Appendix I); • Maintain communications with KPSM reservoir levels with regulators 1 - Police Communications Centre Cairns • With consultation with KPSM shutdown K5 2 - District Disaster Co-ordinator and LDMG, LDMG’s • Record all relevant data on the Emergency Action Cassowary Coast and Tablelands Regional Councils. • Consider impact to downstream PAR of Plan Event Data Information Sheets, Keep a daily 3 – When flooding over tops Tully Falls Weir, Re-issue flood mitigation releases from dam, warn running record of all actions / events and telephone request use of EA system – utilise Template #1 with recreational river users as required calls Polygon #1 (Appendix J1 & K1) through CC LDMG for • Activate appropriate LDMG agencies to • After the flood peak immediately below the dam notification of downstream PAR manage situation. has started to subside, re-deploy to the Weir to 3 - Maintain staff to warn recreational river users and • CC LDMG initiate action plan for follow the flood peak downstream. Maintain campers above Tully River Bridge as required, downstream PAR, Forward request for communication with KPSM and record observed 4 - Director Dam Safety (Water Supply), DNRME Emergency Alert System from KPSM. damage. 5 - CCQ Community and Stakeholder Engagement Team (Corporate Communications) Commercial River Operators 6 – CCQ CEO (or responsible GM if the CEO cannot be • Warn operations staff of situation and contacted) – Update on situation review river emergency plans / actions. • Shutdown K5 if not previously done to avoid damage to plant, review KPS operations in view of current Police situation. • Assist with warning recreational river • Review KPS operations with flood approaching users. Intake. • Instigate search for any missing persons • Maintain communication with stakeholders as requested by agencies or as changes occur at Dam. • Recall Forward Commander as the flood peak progresses downstream.

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Emergency Event - Sudden Deflating of the Rubber Dam

13.3.4 STAND DOWN

Activation indicators and General Characteristics – Flood water is no longer coming over spillway crest and flood peak has progressed past Tully River Bridge.

STAND DOWN Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Compile an Emergency Event Report as detailed in • Notify via phone / email the following agencies of Stakeholders. the Emergency Action Plan Event Data Information the event conclusion; Sheet and forward a copy to KPSM 1 - Police Communications Centre Cairns ALL • When flood peak has progressed past the Tully Falls 2 - District Disaster Co-ordinator and LDMG, • Record correspondence with KPSM. Weir, check for any damage to Dam and Weir walls, Cassowary Coast and Tablelands Regional Councils. • Notify all previously contacted banks and structures and Intake structure, notify 3 - Director Dam Safety (Water Supply), DNRME downstream PAR of event conclusion, KPSM of any issues. 4 – CCQ Crisis Leader (if Crisis Leadership Team has make damage assessment. been activated) or Incident Manager (if Incident • Review and record any actions taken with Management Team has been activated) flood affected residence downstream.

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13.4 Dam Hazard Event - Increased leakage through embankment or embankment instability / failure – Extreme impact for downstream PAR

Scenario Conditions – An embankment failure occurs to the Main dam wall or South Saddle dam due to piping or excessive leaking through dam wall. Note – This event will have the greatest impact if it occurs towards the end of the Tropical North Queensland wet season (February to May) when the dam is at its highest level for the year, as the dam level is drawn down throughout the year the impact will be reduced.

Activation Level Table Dam Hazard #4.

Inundation Map reference; TRC Area: F1 – Overview F4 – Inundation area (Sunny Day Failure – No Rain event Flood) F5 – Inundation Area (Failure during Flooding Event) CCRC Area: F2 – Overview F10 to F15 – Inundation Area (Sunny Day Failure – No Rain event Flood) F16 to F23 – Inundation Area (Failure during Flooding Event)

13.4.1 ALERT

Activation indicators and General Characteristics – Unexpected increased leakage through the embankment at seepage measuring points, additional seepage points located or cloudy discharge in the outlets. This will generally be detected during routine inspections of the dam.

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Emergency Event - Increased leakage through embankment or embankment instability / failure – Extreme impact for downstream PAR

13.4.2 LEAN FORWARD Activation indicators and General Characteristics – Increasing flows through embankment with very cloudy water. Flows significant enough to carry silt and move small debris.

LEAN FORWARD Actions and notifications in order of precedence Dam Site KPS External Agencies & CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Report observations immediately by radio or • Discuss situation at dam with Forward Stakeholders. phone to KPSM for evaluation. Commander, advise Principle Civil Engineer LDMG’s • Monitor and record the flows four (4) hourly until a • Review current KPS operations including K5, liaise • CC LDMG initiate action plan for decreasing trend is observable or as directed with CCQ Duty Spot Market Trader downstream PAR, Forward request for otherwise by KPSM at the time of the event (use • Initiate actions to reduce pressure on Dam Emergency Alert System from KPSM, photographs and descriptive terms to describe • Phone Commercial River operators, request Warn recreational river users as required. flows i.e. flowing, fast flowing, gushing) numbers on river inform of situation • TRC LDMG Review / initiate action plan • Twice daily, Inspect all dam structures including • Contact the following agencies via phone unless for recreational river users below dam as spillway, main embankment, south saddle dam otherwise indicated, in order of priority and advise required (if possible, “if it’s flooded forget and appurtenant structures, notify KPSM of any of situation at Dam (use communication template it”) in consultation with KPSM and Police. issues. – Appendix I); • Activate appropriate LDMG agencies to • Reduce pressure on embankment and reduce 1 - Police Communications Centre Cairns manage situation. storage volume – open both Discharge Regulators 2 - District Disaster Co-ordinator and LDMG, to the fully open position (refer to the Cassowary Coast and Tablelands Regional Councils. Commercial River Operators Koombooloomba Dam Operation and 3 – Request via email, use of EA system – utilise • Warn operations staff of situation and Maintenance Manual) Template #1 with Polygon #2 (Appendix J1 & K2) review river emergency plans / actions. • Dam level to be entered on the Reservoir Level through CC LDMG for notification of downstream PAR Data Sheet. 4 - Dispatch staff to warn recreational river users and Police • Assist with warning Recreational river users of campers above Tully River Bridge, • Assist with warning recreational river event and advise any watercraft on the dam of the 5 - Director Dam Safety (Water Supply), DNRME users. situation where possible. 6 – CCQ CEO (or responsible GM if the CEO cannot be contacted) – Notify and update on situation (and All advise that LDMG agencies are being activated to • Maintain communications with KPSM. manage the situation)

• Maintain communication with stakeholders as requested by agencies or as changes occur at Dam

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Emergency Event - Increased leakage through embankment or embankment instability / failure – Extreme impact for downstream PAR

13.4.3 STAND UP

Activation indicators and General Characteristics – An embankment failure occurs or is imminent due excessive piping or embankment instability.

STAND UP Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Immediately confirm an abnormality and water • Contact the following agencies in order of priority Stakeholders. levels. and warn of situation at Dam (use communication • Record correspondence with KPSM. • IMMEDIATELY advise KPSM that a failure of the template – Appendix I); • Monitor situation at Dam. embankment has occurred or is imminent and 1 - Police Communications Centre Cairns • Maintain communications with KPSM report the storage level and condition of 2 - District Disaster Co-ordinator and LDMG, LDMG’s embankment 2 hourly or as often as requested by Cassowary Coast and Tablelands Regional Councils. • CC LDMG initiate action plan for KPSM. 3 – When flooding has reached Tully Falls Weir – downstream PAR, Forward request for • Record the Reservoir level on the Reservoir Level Request via email, use of EA system – utilise Template Emergency Alert System from KPSM, Data Sheet. #2 with Polygon #2 or 3 (as appropriate) (Appendix J2 Warn recreational river users as required. • Record all relevant data on the Emergency Action & K2 or 3) through CC LDMG for notification of • TRC LDMG Review / initiate action plan Plan Event Data Information Sheets, Keep a daily downstream PAR for recreational river users below dam as running record of all actions / events and telephone 4 - Maintain staff to warning recreational river users and required (if possible, “if it’s flooded forget calls campers above Tully River Bridge as required, it”) in consultation with KPSM and Police. • Assist with warning Recreational river users of 5 - Director Dam Safety (Water Supply), DNRME • Activate appropriate LDMG agencies to event and advise any watercraft on the dam of the 6 - CCQ Community and Stakeholder Engagement manage situation. situation where possible. Team (Corporate Communications) Commercial River Operators • Shutdown K5 if not previously done to avoid 7 - Contact CCQ CEO (or responsible GM if the CEO • Warn operations staff of situation and damage to plant. cannot be contacted) – Update on situation review river emergency plans / actions. • Follow the progress of the flood downstream and • Shutdown K5 if not previously done to avoid damage Police report damage if possible. to plant, review KPS operations in view of current • Assist with warning recreational river situation. users. • Review KPS operations with respect to shutting Instigate search for any missing persons down Generation units. as appropriate. • Maintain communication with stakeholders as requested by agencies or as changes occur at Dam and progress of flood waters. • Advise Principle Civil Engineer of embankment failure.

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Emergency Event - Increased leakage through embankment or embankment instability / failure – Extreme impact for downstream PAR

13.4.4 STAND DOWN

Activation indicators and General Characteristics – Water escaping from the dam is contained within the riverbanks downstream of the dam with minimal effects on normal river flows.

STAND DOWN Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • If required undertake special inspection of dam as • Notify the following agencies of the event Stakeholders. per SOP 22. conclusion; • Compile an Emergency Event Report as detailed in 1 - Police Communications Centre Cairns ALL the Emergency Action Plan Event Data Information 2 - District Disaster Co-ordinator and LDMG, • Record correspondence with KPSM. Sheet and forward a copy to KPSM Cassowary Coast and Tablelands Regional Councils. • Notify all previously contacted • Inspect dam for all damage to dam walls, banks and 3 - Director Dam Safety (Water Supply), DNRME downstream PAR of event conclusion, structures. 4 – CCQ Crisis Leader (if Crisis Leadership Team has make damage assessment. been activated) or Incident Manager (if Incident • Review and record any actions taken with Management Team has been activated) flood affected residence downstream.

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13.5 Dam Hazard Event - Earthquake felt in area

Scenario Conditions – An earthquake occurs in the vicinity of the Dam which leads to instability of the dam wall

Note – This event will have the greatest impact if it occurs towards the end of the Tropical North Queensland wet season (February to May) when the dam is at its highest level for the year, as the dam level is drawn down throughout the year the impact will be reduced.

Activation Level Table Dam Hazard #5. Inundation Map reference; TRC Area: F1 – Overview F4 – Inundation area (Sunny Day Failure – No Flood) F5 – Inundation Area (Failure during Flooding Event) CCRC Area: F2 – Overview F10 to F15 – Inundation Area (Sunny Day Failure – No Flood) F16 to F23 – Inundation Area (Failure during Flooding Event) 13.5.1 ALERT

Activation indicators and General Characteristics – Earthquake felt in area within 50km of dam and possible anomalies detected at the dam site.

ALERT Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team O&M Personnel / Forward Commander KPSM or Delegate LDMG’s, Local Authorities and External • Inspect all dam structures including spillway, main • Dispatch Forward Commander to review situation Stakeholders. embankment, south saddle dam and appurtenant at Dam • Report any external impacts of the structures for signs of distress or damage, notify • Investigate intensity of earthquake using the earthquake to KPSM to assist with KPSM of any issues. Modified Mercalli Intensity Scale (found at evaluating intensity. • Measure and document flows and observations from APPENDIX E) seepage points and drains. • Phone impacted LDMG for information to assist • Report observations to KPSM. with evaluating intensity. CCQ Emergency Incident team • Discuss findings at dam with Principle Civil • Carry out internal notification as required Engineer • Review current KPS operations, liaise with CCQ Duty Spot Market Trader • Review KPS / dam staffing levels in view of possible condition escalation • Phone / email General Manager Asset Operations or GM Performance Risk and Finance – Notify of EAP Activation. • Email Director Dam Safety (Water Supply), DNRME

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Emergency Event -– Earthquake felt in area

13.5.2 LEAN FORWARD

Activation indicators and General Characteristics – Large increasing flows through embankment with very cloudy water. Flows significant enough to carry silt and move small debris.

LEAN FORWARD Actions and notifications in order of precedence Dam Site KPS External Agencies & CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Report observations immediately to KPSM for • Discuss situation at dam with Forward Stakeholders. evaluation. Commander, advise Principle Civil Engineer • monitor and record the flows four (4) hourly until a • Review current KPS operations including K5, liaise LDMG’s decreasing trend is observable or as directed with CCQ Market Trading Team • CC LDMG initiate action plan for otherwise by KPSM at the time of the event (use • Initiate actions to reduce pressure on Dam downstream PAR, Forward request for photographs and descriptive terms to describe • Phone Commercial River operators, request Emergency Alert System from KPSM, flows i.e. flowing, fast flowing, gushing). numbers on river inform of situation Warn recreational river users as required. • Twice daily, Inspect all dam structures including • Contact the following agencies via phone unless • TRC LDMG Review / initiate action plan spillway, main embankment, south saddle dam and otherwise indicated, in order of priority and advise for recreational river users below dam as appurtenant structures for additional signs of of situation at Dam (use communication template required (if possible, “if it’s flooded forget distress, notify KPSM of any issues. – Appendix I); it”) in consultation with KPSM and Police. 1. Reduce pressure on embankment and reduce 1 - Police Communications Centre Cairns • Activate appropriate LDMG agencies to storage volume - open both Discharge 2 - District Disaster Co-ordinator and LDMG, manage situation. Regulators to the fully open position (refer to the Cassowary Coast and Tablelands Regional Councils. Koombooloomba Dam Operation and 3 – Request via email, use of EA system utilise Commercial River Operators Maintenance Manual Template #1 with Polygon #2 (Appendix J1 & K2) • warn operations staff of situation and • Dam level to be entered on the Reservoir Level through CC LDMG for notification of downstream PAR review river emergency plans / actions. Data Sheet. 4 - Dispatch staff to warn recreational river users and • Assist with warning Recreational river users of campers above Tully River Bridge, Police event and warn any watercraft on the dam of the 5 - Director Dam Safety (Water Supply), DNRME • Assist with warning recreational river situation where possible. 6 - CCQ CEO (or responsible GM if the CEO cannot users. be contacted) – Notify and update on situation (and advise that LDMG agencies are being activated to All manage the situation) • Maintain communications with KPSM. • Maintain communication with stakeholders as requested by agencies or as changes occur at Dam

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Emergency Event -– Earthquake felt in area

13.5.3 STAND UP

Activation indicators and General Characteristics – An embankment failure occurs or is imminent due excessive piping or embankment instability.

STAND UP Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Immediately confirm an abnormality and water • Contact the following agencies via phone unless Stakeholders. levels. otherwise indicated, in order of priority and warn of • Record correspondence with KPSM. • IMMEDIATELY advise KPSM by radio / phone, situation at Dam (use communication template – • Monitor situation at Dam. that a failure of the embankment has occurred Appendix I); • Maintain communications with KPSM or is imminent and report the storage level and 1 - Police Communications Centre Cairns condition of embankment 2 hourly or as often 2 - District Disaster Co-ordinator and LDMG, Cassowary LDMG’s as requested by KPSM. Coast and Tablelands Regional Councils. • CC LDMG initiate action plan for • Record the Reservoir level on the Reservoir 3 – Request via email, the use of EA system – utilise downstream PAR, Forward request for Level Data Sheet. Template #2 with Polygon #2(Appendix J2 & K2) through Emergency Alert System from KPSM, • Record all relevant data on the Emergency CC LDMG for notification of downstream PAR Warn recreational river users as required. Action Plan Event Data Information Sheets, 4 - Maintain staff to warn recreational river users and • TRC LDMG Review / initiate action plan Keep a daily running record of all actions / campers above Tully River Bridge as required, for recreational river users below dam as events and telephone calls 5 - Director Dam Safety (Water Supply), DNRME required (if possible, “if it’s flooded forget • Assist with warning Recreational river users of 6 - CCQ Community and Stakeholder Engagement Team it”) in consultation with KPSM and Police. event and advise any watercraft on the dam of (Corporate Communications) • Activate appropriate LDMG agencies to the situation where possible. 7 - CCQ CEO (or responsible GM if the CEO cannot be manage situation. • Shutdown K5 if not previously done to avoid contacted) – Update on situation damage to plant. • Shutdown K5 if not previously done to avoid damage to Commercial River Operators • Follow the progress of the flood downstream plant, review KPS operations in view of current • Warn operations staff of situation and and report damage. situation. review river emergency plans / actions. • Review KPS operations with respect to shutting down Generation units. Police • Maintain communication with stakeholders as • Assist with warning recreational river requested by agencies or as changes occur at Dam and users. progress of flood waters. • Instigate search for any missing persons • Advise Principle Civil Engineer by phone of embankment failure.

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Emergency Event - Earthquake felt in area

13.5.4 STAND DOWN

Activation indicators and General Characteristics – Water escaping from the dam is contained within the riverbanks downstream of the dam with minimal effects on normal river flows.

STAND DOWN Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • If required undertake special inspection of dam as • Notify via email the following agencies of the event Stakeholders. per SOP 22. conclusion; • Compile an Emergency Event Report as detailed in 1 - Police Communications Centre Cairns ALL the Emergency Action Plan Event Data Information 2 - District Disaster Co-ordinator and LDMG, • Record correspondence with KPSM. Sheet and forward a copy to KPSM Cassowary Coast and Tablelands Regional Councils. • Notify all previously contacted • Inspect dam for all damage to dam walls, banks and 3 - Director Dam Safety (Water Supply), DNRME downstream PAR of event conclusion, structures. 4 – CCQ Crisis Leader (if Crisis Leadership Team has make damage assessment. been activated) or Incident Manager (if Incident • Review and record any actions taken with Management Team has been activated) flood affected residence downstream.

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13.6 Dam Hazard Event - Toxic or hazardous substances spill within the Water Storage Area

Scenario Conditions – On detection or notification of a toxic or hazardous substance contaminating the catchment or storage, the appropriate response is detailed below:

Activation Level Table Dam Hazard #6.

13.6.1 ALERT

Activation indicators and General Characteristics – Suspect contamination by Toxic or Hazardous substance within catchment area. This will generally be detected during the twice weekly routine inspection of the facilities or reported by a member of the public.

ALERT Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team O&M Personnel / Forward Commander KPSM or Delegate LDMG’s, Local Authorities and External • Investigate to confirm the water storage for • Dispatch Forward commander to reported Stakeholders. contamination. contamination. • No action required at this stage • Report observations immediately to KPSM for • Monitor reports from water storage. evaluation. • Review information, liaise with CCQ Northern • All data to be entered on the Emergency Action Region Environmental Advisor. Plan Event Data Information Sheet • Contact General Manager Asset Operations or GM Performance Risk and Finance – Notify of EAP Activation.

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Dam Hazard Event - Toxic or hazardous substances spill within the Water Storage Area

13.6.2 LEAN FORWARD Activation indicators and General Characteristics – Visual confirmation of contamination from suspected Toxic or Hazardous substance within catchment.

LEAN FORWARD Actions and notifications in order of precedence Dam Site KPS External Agencies & CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Identify the location of the contamination. • Review reported information, liaise with CCQ Stakeholders. • Investigate to identify the substance if safe to do Northern Region Environmental Advisor. Review so. environmental notification requirements LDMG’s • If possible, identify the source of the • Shut off all water releases from Dam, Weir and • Initiate action plans for downstream PAR contamination and isolate it if safe to do so. Kareeya Power Station. and advise of contamination and no • Report observations immediately to KPSM for • Liaise with CCQ Duty Spot Market Trader releases from dam, Notify recreational evaluation. regarding KPS operations including K5 river users as required. • Shut off all water releases from Dam, Weir and • Contact the following agencies via phone unless • Activate appropriate LDMG agencies to Kareeya Power Station. otherwise indicated in priority order and advise of manage situation i.e. Fire Service • Instigate actions to control the spread of the the hazard conditions (use communication template contamination. – Appendix I) as often as requested to and or if Commercial River Operators • All data to be entered on the Emergency Action any changes to the event characteristics occur, • Notify operations staff of situation and Plan Event Data Information Sheet twice daily as a minimum (or as otherwise agreed): review river emergency plans / actions. • Assist with warning Recreational river users of 1 - Police Communications Centre Cairns event and advise any watercraft on the water 2 - LDMG, Cassowary Coast and Tablelands Regional Police storage of the situation where possible. Councils. • Assist with notifying recreational river 3 - Cassowary Coast and Tablelands Regional users. Councils environmental team. 4 - Commercial River operators, request numbers on All river, inform of situation. • Maintain communications with KPSM. 5 - Dispatch staff to warn recreational river users and campers above Tully River Bridge 6 - Director Dam Safety (Water Supply), 7 - CCQ CEO (or responsible GM if the CEO cannot be contacted) – Notify and update on situation (and advise that LDMG agencies are being activated to manage the situation) • Maintain communication with stakeholders as requested by agencies or as changes occur at Incident location

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Dam Hazard Event - Toxic or hazardous substances spill within the Water Storage Area

13.6.3 STAND UP

Activation indicators and General Characteristics – Confirmation the contamination is of a toxic or Hazardous substance in the water storage.

STAND UP Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • IMMEDIATELY advise KPSM of the size and • Maintain communication with CCQ Northern Stakeholders. location of the contamination. Region Environmental Advisor • Record correspondence with KPSM. • Continue to investigate to identify the substance if • Contact the following agencies via phone unless • Monitor situation at Incident location. safe to do so. otherwise indicated, in order of priority and warn • Maintain communications with KPSM • Maintain efforts to identify the source of the of situation at Dam (use communication template contamination and isolate it if safe to do so. – Appendix I); LDMG’s • Maintain actions to control the spread of the 1 - Police Communications Centre Cairns • Warn downstream PAR of contamination of contamination. 2 - District Disaster Co-ordinator and LDMG, waterways if not contained, Warn • Record all relevant data on the Emergency Action Cassowary Coast and Tablelands Regional recreational river users as required. Plan Event Data Information Sheets, Keep a daily Councils. • Activate appropriate LDMG agencies to running record of all actions / events and telephone 3 - Director Dam Safety (Water Supply), DNRME manage situation. calls 4 - Dispatch staff to warn recreational river users • Assist with warning Recreational river users of event and campers above Tully River Bridge Police and advise any watercraft on the water storage of 5 - CCQ Community and Stakeholder Engagement • Assist with warning recreational river users. the situation where possible. Team (Corporate Communications) • Assist to control incident location. 6 - Contact CCQ CEO (or responsible GM if the CEO cannot be contacted) – Update on situation Fire Service • Maintain communication with stakeholders as • Assist with control and clean-up of requested by agencies or as changes occur at contamination. incident location. • Assist to control incident location.

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Dam Hazard Event - Toxic or hazardous substances spill within the Water Storage Area

13.6.4 STAND DOWN

Activation indicators and General Characteristics – Contamination has been contained and cleaned away or confirmation the contamination was not of a Toxic or Hazardous substance.

STAND DOWN Actions and notifications in order of precedence Dam Site KPS External Agencies CCQ Emergency team Forward Commander & Assistant KPSM or Delegate LDMG’s, Local Authorities and External • Compile an Emergency Event Report as detailed • Notify the following agencies of the event Stakeholders. in the Emergency Action Plan Event Data conclusion; Information Sheet and forward a copy to KPSM 1 - Police Communications Centre Cairns ALL • Remove contaminated material from site as per 2 - District Disaster Co-ordinator and LDMG, • Record correspondence with KPSM. approved procedures Cassowary Coast and Tablelands Regional Councils. • Notify all previously contacted downstream • Reinstate all spill kits and clean all equipment used 3 - Director Dam Safety (Water Supply), DNRME PAR of event conclusion, make damage during event. 4 – CCQ Crisis Leader (if Crisis Leadership Team has assessment. been activated) or Incident Manager (if Incident • Review and record any actions taken with Management Team has been activated) affected residence downstream.

• File the information in the relevant medium and forward copy of emergency event reports to the Director Dam Safety (Water Supply), DNRME within 30 days of event. • Liaise with CCQ Northern Region Environmental Advisor on follow up action for site environmental management.

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14. Event Data

14.1 Lake Level – Table and Graph

DATE TIME LAKE LEVEL LAKE LEVEL (PROBE) (SCADA)

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Dam Level

Dam HeightDam 20

0 0:00 1:00 2:00 3:00 4:00 5:00 6:00 7:00 8:00 9:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00 20:00 21:00 22:00 23:00 1/08/2006 Date / Time Dam Level (Scada) Dam Level (Probe)

Note: Data for illustration purposes only. Not actual data.

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14.2 Log of Events LOG OF EVENTS

DATE TIME EVENT DESCRIPTION / ACTION CARRIED OUT RECORD ENTERED BY

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14.3 Record of Communication RECORD OF COMMUNICATION PHONE CONTACT DATE TIME MESSAGE SENT / RECEIVED CALL RECEIVED BY NUMBER PERSON

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14.4 Koombooloomba Dam - Emergency Event Report

Type of Event: (e.g. Embankment leakage, Earthquake) Commencing: …..:….hrs …./…./…… Finishing: …..:….hrs .../.../…… Description of Event: (Describe the lead up to and progress of the event Weather conditions / Rainfall in catchment Rate of rise in Reservoir: When spillway overflowed: Peak level: Describe any immediate downstream damage: Any other relevant information: Statistics: Total Inflow: Mega litres Total Discharge: Mega litres Capacity / volume of Reservoir prior to event: % Volume prior to inflow Mega litres Maximum Inflow: Mega litres per day Maximum Discharge Mega litres per day Event Progress: (Briefly describe daily rate of rise, time to peak level and weather conditions. Attach copies of the Reservoir Level Data Sheet)

General Comments: (Include any observations or comments regarding the event such as Areas inspected, type of monitoring carried out, equipment malfunctions and safety issues.

Damage Report: (Detail any tail water damage to the embankment or stream bank damage in the immediate area of the dam. Attach photos) Include location of areas affected.

Attachments: (List photos, video of the event, Spillway Level versus Time Graph, Communication Record Sheet, Log of Events / Action Sheet)

Signed: Designation: Date:

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, …………………………... …./…./…….

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14.4 Koombooloomba Dam - Emergency Event Report (cont.)

Review of Event Actions / Activities Describe the effectiveness of the communication during the event;

List any Improvements that have been identified for Communications during an Event;

Describe the effectiveness of the actions taken in response to the event;

List any Improvements that have been identified for actions taken in response to the event;

Assessment of whether and to what extent the Emergency Action Plan effectively dealt with the Event;

Recommend any changes to the Emergency Action Plan that would allow the plan to deal with a similar event more effectively;

Any other relevant matters to the emergency condition and how it was dealt;

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15. Links and References

13/2428386 - Revised dam failure analysis for Koombooloomba dam - Feb2010 13/2428442 - Final Report from Sunwater for Acceptable Flood Capacity Assessment for Koombooloomba Dam, April2010 13/1678011 - Emergency Action Plan Event Data Information 13/1668737 - Manual Koombooloomba Dam Operation and Maintenance 13/1668520 - Rubber Dam Operation and Maintenance Manual 13/2172550 - Standing Operating Procedures (SOP's) for Koombooloomba Dam 13/1678011 - Emergency Action Plan Event Data Information 17/88634 - Koombooloomba Dam TEMPLATE #1 - QFES Emergency Alert Request Form 1 17/109395 - Koombooloomba Dam TEMPLATE #2 - QFES Emergency Alert Request Form 2 17/88632 - Koombooloomba Dam Emergency Event Communication Template

Return to Top

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APPENDIX A: Dam Break Analysis

STANWELL CORPORATION LTD

KAREEYA POWER STATION

Extract of Report on

Koombooloomba Dam Tully River AMTD 99.1 km Revised Dam Failure Analysis (HB#1420360)

Prepared by

SUNWATER INFRASTRUCTURE DEVELOPMENT

February 2010

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A-1 -Table 5.1: Peak Discharge from Koombooloomba Dam

Time to Peak Discharge (hr) Scenario Peak Discharge (m³/s)* After Breach After Rain Onset Rubber Dam -SDF 250 0.2 n/a Rubber Dam -Overtopping Failure 330 0.2 n/a Main Dam -SDF 13,510 2.9 n/a Main Dam -PMPDF Failure 22,250 2.9 38.1 Main Dam -PMPDF No Failure 2,580 n/a 39.9 * The peak discharge shown is the combined dam and spillway discharge

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A-2 – Peak inundation level and flood depth

Base Stream river Bag Key Bed EL Site EL height Bag Failure PMPDF PMPDF locatio AMTD (m (m EL (m Failure – – – – No n # Location (km) AHD) AHD) AHD) SDF Flood SDF Failure Failure Legend 1 Picnic Area 98.6 702.0 703.1 703.1 EL 705.0 EL EL EL EL 713.3 m AHD D/S Dam - (1.9m) 705.5 725.4 730.4 (10.2m) Flood level at Site Site location is 1.9m (1.4m) (22.3m) (27.3m) 10.2m Flood level above Base river 0.0m above 1.4m 22.3m 27.3m Flow base river height

2 Tully Falls 89.0 662.0 672.08 666.1 EL 667.3 EL EL EL EL 674.0 m AHD Diversion Non (-4.8m) 667.6 683.5 689.3 (1.9m) Flood level at Site Weir - over 1.2m (-4.5m) (11.4m) (17.2m) 7.9m Flood level above Base river Site location is flow 1.8m 17.4m 23.2m Flow 6.0m above spillway base river height

3 U/S Tully 88.3 660.5 n/a 661.5 EL 663.4 EL EL EL EL 670.8 m AHD Falls - (n/a) 663.8 679.3 684.0 (n/a) Flood level at Site Site location 1.9m (n/a) (n/a) (n/a) 9.3m Flood level above Base river EL is unknown 2.3m 17.8m 22.5m Flow

4 Kareeya PS 85.0 198.0 213.0 200.8 EL 202.2 EL EL EL EL 204.7 m AHD - West - (-10.8m) 202.4 210.7 214.8 (-8.3m) Flood level at Site Site location is 1.4m (- (-2.3m) (1.8m) 3.9m Flood level above Base river 12.2m above 10.6m) 9.9m 14.0m Flow base river 1.6m height

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Base Stream river Bag Key Bed EL Site EL height Bag Failure PMPDF PMPDF locatio AMTD (m (m EL (m Failure – – – – No n # Location (km) AHD) AHD) AHD) SDF Flood SDF Failure Failure Legend 5 Kareeya PS 84.8 198.0 213.0 197.3 EL 198.2 EL EL EL EL 204.7 m AHD - East - (-14.8m) 198.4 210.7 214.8 (-8.3m) Flood level at Site Site location is 0.9m (- (-2.3m) (1.8m) 7.4m Flood level above Base river 15.7m above 14.6m) 13.4m 17.5m Flow base river 1.1m height

6 Picnic / 74.3 73.0 80.0 73.7 EL 74.8 EL 75.1 EL 85.3 EL 89.8 EL 80.2 m AHD Camping (-5.2m) (-4.9m) (5.3m) (9.8m) (0.2m) Flood level at Site Ground - 1.1m 1.4m 12.0m 16.1m 6.5m Flood level above Base river Site location is Flow 6.3m above base river height

7 Tully River 70.4 46.2 60.0 55.4 EL 56.2 EL 56.4 EL 63.9 EL 67.3 EL 59.9 m AHD Bridge - (-3.8m) (-3.6m) (3.9m) (7.3m) (-0.1) Flood level at Site Site location is 0.8m 1.0m 8.6m 11.9m 4.5m Flood level above Base river 4.6m above Flow base river height

8 Road 57.5 15.0 n/a 17.6 EL 19.4 EL 19.8 EL 26.2 EL 28.4 EL 24.3 m AHD Crossing - (n/a) (n/a) (n/a) (n/a) (n/a) Flood level at Site Site location 1.8m 2.2m 8.2m 10.8m 6.7m Flood level above Base river EL is Unknown Flow

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Base Stream river Bag Key Bed EL Site EL height Bag Failure PMPDF PMPDF locatio AMTD (m (m EL (m Failure – – – – No n # Location (km) AHD) AHD) AHD) SDF Flood SDF Failure Failure Legend 9 Weary Pocket 54.5 11.6 16.0 15.6 EL 17.8 EL 18.4 EL 23.3 EL 25.8 EL 22.0 m AHD - (1.8m) (2.4m) (7.3m) (9.8m) (6.0m) Flood level at Site Site location is 2.2m 2.8 8.1m 10.2m 6.4m Flood level above Base river 0.4m above Flow base river height

10 Jarra Creek 30.9 5.6 14.0 7.6 EL 9.5 EL 10.0 EL 13.0 EL 14.2 EL 13.3 m AHD Junction - (-4.5m) (-4.0m) (-1.0m) (0.2m) (-0.7m) Flood level at Site Site location is 1.9m 2.4m 6.1m 6.6m 5.7m Flood level above Base river 6.4m above Flow base river height

11 Bruce 17.5 1.5 10.0 2.1 EL 3.7 EL 4.3 EL 8.2 EL 9.9 EL 9.1 m AHD Highway, (-6.3m) (-5.7m) (-1.8m) (-0.1m) (-0.9m) Flood level at Site Euramo - 1.6m 2.2m 5.2m 7.8m 7.0m Flood level above Base river Site location is Flow 7.9m above base river height

Source – Koombooloomba Dam Failure Analysis 2010

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A-3 – Flood Levels

740

730

720

U/S Tully Falls Tully U/S 710 Picnic Area D/S Dam Koombooloomba Dam

Tully Falls Diversion Weir 700

690 Elevation (m AHD) (m Elevation

680

Rubber Dam_SDF Rubber Dam_Overtopping Failure Main Dam - SDF 670 Main Dam DCF - Failure Main Dam DCF - No Failure Main Dam PMPDF - Failure Main Dam PMPDF - No Failure 660 Stream Bed

650 100 99 98 97 96 95 94 93 92 91 90 89 88 AMTD (km)

Figure 5.3: Peak Flood Levels in Profile – Above Falls Model

260 250 240 230 220 210 200 190 180 170 Weary Pocket Road CrossingRoad 160 Tully River Bridge

JarraCreek Junction 150 Bruce Highway, Euramo

Picnic/Camping Ground 140 130 Kareeya Power Station East - Kareeya Power Station West - 120 110

100 AHD) (m Elevation 90 Rubber Dam_SDF Rubber Dam_Overtopping Failure 80 Main Dam - SDF 70 Main Dam DCF - Failure Main Dam DCF - No Failure 60 Main Dam PMPDF - Failure 50 Main Dam PMPDF - No Failure 40 Stream Bed 30 20 10 0 88 86 84 82 80 78 76 74 72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 AMTD (km)

Figure 5.4: Peak Flood Levels in Profile – Below Falls Model

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A-4 – Flood Timing 5.1 FLOOD TIMING The tables below summarise the flood timings at key locations for the various scenarios. As can be seen from the values below, the flood peak takes between 24 and 56 hours to travel from Koombooloomba Dam to Euramo for the various scenarios. The attenuation effects also can be observed in the hydrographs in Appendix C and Appendix D.

Table 5.4: Flood Timing for Sunny Day Failure of Rubber Dam Flooding Flooding AMTD Start of Rise Peak Location Starts Stops (km) (dd:hh:mm)¹ (dd:hh:mm)¹ (dd:hh:mm)¹ (dd:hh:mm)¹ 98.6 Picnic Area D/S Dam 00:00:00 00:00:00 00:00:40 02:13:40 89.0 Tully Falls Diversion Weir2 00:01:30 Not Flooded 00:03:25 Not Flooded 88.3 U/S Tully Falls 00:01:35 n/a 00:03:30 n/a 85.0 Kareeya PS - West 00:01:40 Not Flooded 00:03:30 Not Flooded 84.8 Kareeya PS - East 00:01:40 Not Flooded 00:03:30 Not Flooded 74.3 Picnic/Camping Ground 00:01:50 Not Flooded 00:04:30 Not Flooded 70.4 Tully River Bridge 00:02:15 Not Flooded 00:04:15 Not Flooded 57.5 Road Crossing 00:04:55 n/a 00:07:45 n/a 54.5 Weary Pocket 00:05:40 00:06:30 00:12:10 02:17:00 30.9 Jarra Creek Junction 00:10:50 Not Flooded 01:00:40 Not Flooded 17.5 Bruce Highway, Euramo 00:14:00 Not Flooded 01:04:25 Not Flooded 1 The flood timings shown are from the start of breach development 2 Flooding start and stop times are based on the non-overflow abutment crest EL.

Table 5.5: Flood Timing for Overtopping Failure of Rubber Dam Flooding Flooding AMTD Start of Rise Peak Location Starts Stops (km) (dd:hh:mm)¹ (dd:hh:mm)¹ (dd:hh:mm)¹ (dd:hh:mm)¹ 98.6 Picnic Area D/S Dam 00:00:00 00:00:00 00:00:35 00:22:55 89.0 Tully Falls Diversion Weir2 00:01:05 Not Flooded 00:03:00 Not Flooded 88.3 U/S Tully Falls 00:01:10 n/a 00:03:05 n/a 85.0 Kareeya PS - West 00:01:10 Not Flooded 00:03:05 Not Flooded 84.8 Kareeya PS - East 00:01:10 Not Flooded 00:03:05 Not Flooded 74.3 Picnic/Camping Ground 00:02:20 Not Flooded 00:04:05 Not Flooded 70.4 Tully River Bridge 00:02:35 Not Flooded 00:04:20 Not Flooded 57.5 Road Crossing 00:04:00 n/a 00:07:05 n/a 54.5 Weary Pocket 00:04:25 FE3 00:09:30 FE3 30.9 Jarra Creek Junction 00:08:30 Not Flooded 00:20:20 Not Flooded 17.5 Bruce Highway, Euramo 00:10:40 Not Flooded 00:23:30 Not Flooded

1 The flood timings shown are from the start of breach development 2 Flooding start and stop times are based on the non-overflow abutment crest EL. 3 FE: Flooded for entire event.

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Table 5.6: Flood Timing for Sunny Day Failure

Flooding Flooding AMTD Start of Rise Peak Location Starts Stops (km) (dd:hh:mm)¹ (dd:hh:mm)¹ (dd:hh:mm)¹ (dd:hh:mm)¹ 98.6 Picnic Area D/S Dam 00:00:10 00:00:10 00:03:05 00:18:45 89.0 Tully Falls Diversion Weir2 00:01:45 00:02:40 00:04:30 00:10:00 88.3 U/S Tully Falls 00:01:50 n/a 00:04:30 n/a 85.0 Kareeya PS - West 00:01:50 Not Flooded 00:04:30 Not Flooded 84.8 Kareeya PS - East 00:01:50 Not Flooded 00:04:30 Not Flooded 74.3 Picnic/Camping Ground 00:02:10 00:03:20 00:04:50 00:09:00 70.4 Tully River Bridge 00:02:20 00:03:30 00:04:55 00:08:50 57.5 Road Crossing 00:03:45 n/a 00:06:35 n/a 54.5 Weary Pocket 00:04:00 00:04:40 00:07:30 01:12:20 30.9 Jarra Creek Junction 00:08:45 Not Flooded 00:16:20 Not Flooded 17.5 Bruce Highway, Euramo 00:11:00 Not Flooded 01:03:50 Not Flooded

1 The flood timings shown are from the start of breach development. 2 Flooding start and stop times are based on the non-overflow abutment crest EL.

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Table 5.9: Flood Timing for PMP Design Flood - Dam Failure

Flooding Flooding AMTD Start of Rise Peak Location Starts Stops (km) (dd:hh:mm)¹ (dd:hh:mm)¹ (dd:hh:mm)¹ (dd:hh:mm)¹ Picnic Area D/S Dam 01:14:15 98.6 00:00:00 FE3 FE3 (2.8 hr) Tully Falls Diversion Weir2 01:15:15 02:06:15 89.0 00:00:00 01:07:00 (3.8 hr) (18.8 hr) U/S Tully Falls 01:15:20 88.3 00:00:00 n/a n/a (3.8 hr) Kareeya PS - West 01:14:40 01:15:20 01:16:45 85.0 00:00:00 (3.2 hr) (3.8 hr) (5.3 hr) Kareeya PS - East 01:14:40 01:15:20 01:16:45 84.8 00:00:00 (3.2 hr) (3.8 hr) (5.3 hr) Picnic/Camping Ground 01:13:15 01:15:35 02:03:35 74.3 00:00:00 (1.8 hr) (4.1 hr) (16.1 hr) Tully River Bridge 01:13:35 01:15:40 02:02:40 70.4 00:00:00 (2.1 hr) (4.2 hr) (15.2 hr) Road Crossing 01:15:05 57.5 00:00:00 n/a n/a (3.6 hr) Weary Pocket 01:15:55 54.5 00:00:00 FE3 FE3 (4.4 hr) Jarra Creek Junction 01:20:40 01:23:05 02:02:35 30.9 00:00:00 (9.2 hr) (11.6 hr) (15.1 hr) Bruce Highway, Euramo 02:02:40 17.5 00:00:00 Not Flooded Not Flooded (15.2 hr) 1 The flood timings shown are from the onset of rain. The time from start of breach development is shown following in brackets. 2 Flooding start and stop times are based on the non-overflow abutment crest EL 3 FE: Flooded for entire event.

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Table 5.10: Flood Timing for PMPDF - No Dam Failure

Flooding Flooding AMTD Start of Rise Peak Location Starts Stops (km) (dd:hh:mm)¹ (dd:hh:mm)¹ (dd:hh:mm)¹ (dd:hh:mm)¹ 98.6 Picnic Area D/S Dam 00:00:00 FE3 01:16:10 FE3 89.0 Tully Falls Diversion Weir2 00:00:00 01:07:00 01:17:25 02:09:10 88.3 U/S Tully Falls 00:00:00 n/a 01:17:30 n/a 85.0 Kareeya PS - West 00:00:00 Not Flooded 01:17:25 Not Flooded 84.8 Kareeya PS - East 00:00:00 Not Flooded 01:17:25 Not Flooded 74.3 Picnic/Camping Ground 00:00:00 01:15:20 01:17:50 01:22:00 70.4 Tully River Bridge 00:00:00 Not Flooded 01:18:00 Not Flooded 57.5 Road Crossing 00:00:00 n/a 01:20:15 n/a 54.5 Weary Pocket 00:00:00 FE3 01:21:20 FE3 30.9 Jarra Creek Junction 00:00:00 Not Flooded 02:03:00 Not Flooded 17.5 Bruce Highway, Euramo 00:00:00 Not Flooded 02:06:20 Not Flooded 1 The flood timings shown are from the onset of rain. 2 Flooding start and stop times are based on the non-overflow abutment crest EL. 3 FE: Flooded for entire event.

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6.0 Conclusion Seven scenarios were examined: Sunny Day Failure of Rubber Dam, Overtopping Failure of Rubber Dam, Sunny Day Failure, DCF – Dam Failure, DCF – No Dam Failure, PMP Design Flood - Dam Failure and PMP Design Flood – No Dam Failure of Main Embankment. The main conclusions drawn from the analysis are:

. SDF of Rubber Dam would result in the water level starting to rise 1.4 hr after the start of breach development at Kareeya Power Station (AMTD 85.0 km), with the peak occurring at 3.5 hr. At Tully River Bridge (AMTD 70.4 km), the water level would start to rise at 2.25 hr, with the peak occurring at 4.25 hr. The bridge is not overtopped. At Euramo (AMTD 17.5 km), the water level would start to rise at 14 hr, with the peak occurring at 1 day and 4.5 hr. The Bruce Highway crossing at Euramo is not overtopped. . Overtopping Failure of Rubber Dam would result in the water level starting to rise 1.2 hr after the start of breach development at Kareeya Power Station (AMTD 85.0 km), with the peak occurring at 3 hr. At Tully River Bridge (AMTD 70.4 km), the water level would start to rise at 2.5 hr, with the peak occurring at 4.3 hr. The bridge is not overtopped. At Euramo (AMTD 17.5 km), the water level would start to rise at 10.6 hr, with the peak occurring at 23.5 hr. The Bruce Highway crossing at Euramo is not overtopped. . SDF of the main embankment would result in the water level starting to rise 1.8 hr after the start of breach development at Kareeya Power Station (AMTD 85.0 km), with the peak occurring at 4.5 hr. At Tully River Bridge (AMTD 70.4 km), the water level would start to rise at 1.2 hr, with the peak occurring at 4.9 hr. The bridge would be overtopped by up to 3.9 m for 5.3 hr, starting at 3.5 hr. At Euramo (AMTD 17.5 km), the water level would start to rise at 11 hr, with the peak occurring at 1 day and 3.8 hr. The Bruce Highway crossing at Euramo is not overtopped. . A PMPDF – Dam Failure scenario would result in the peak occurring at 1 day and 15.3 hr (3.8 hr after the start of breach development). At Tully River Bridge, the peak occurring at 1 day and 15.6 hr (4.2 hr after breach). The bridge would be overtopped by up to 7.3 m for 13.1 hr, starting at 1 day and 13.5 hr (2.1 hr after breach). At Euramo, the peak occurring at 2 days and 2.6 hr (15.2 hr after breach). The Bruce Highway crossing at Euramo is not overtopped. . A PMPDF – No Dam Failure scenario would result in the peak occurring at 1 day and 17.4 hr. At Tully River Bridge, the peak occurring at 1 day and 18 hr. At Euramo, the peak occurring at 2 day and 6.3 hr. Neither the Tully River Bridge nor the Bruce Highway crossing at Euramo are overtopped. . The DCF effects are very similar to the PMPDF effects, with the peak water levels being 0.2 m lower on average for a dam failure scenario, and 0.7 m lower on average for a no dam failure scenario. Neither the Tully River Bridge nor the Bruce Highway crossing at Euramo are overtopped in No Dam Failure scenario. . Koombooloomba Dam is assessed as having a “High C” Hazard Category rating for SDF and Overtopping Failure of Rubber Dam in accordance with the Guidelines on Acceptable Flood Capacity of Dams (NRM, 2007), based on an estimated PAR of 9 combined with Major damage and loss. This assessment did not consider itinerant river users along the Tully River. . Koombooloomba Dam is assessed as having a “High A” Hazard Category rating for SDF in accordance with the Guidelines on Acceptable Flood Capacity of Dams (NRM, 2007), based on an estimated PAR of 165 combined with major damage and loss. . Koombooloomba Dam is assessed as having a “High A” IFHC rating, based on an estimated incremental PAR of 168 and 165 for the PMPDF and DCF, respectively, combined with major damage and loss.

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APPENDIX B: Dam Data

Drawing No. 216419

Drawing No. 216420

Drawing KAR520652-001

Drawing KAR520652-002

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B-1 – Main Dam Instrumentation

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B-2 – South Saddle Dam Instrumentation

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B-3 – Koombooloomba Dam – Seepage Monitoring – V Notches

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B-4 – Koombooloomba Dam – Seepage Monitoring – Weep Holes & Pipe Outlets

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APPENDIX C: Spillway Rating Curve

Extract from Koombooloomba Dam Acceptable Flood Capacity Report 2010 (Sunwater), Table 11.1

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APPENDIX D: Koombooloomba Dam Storage Capacity Data

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APPENDIX E: Stage Hydrographs at Key Locations

(Extract from Revised Dam Failure Analysis of Feb 2010, Trim Ref;13/2428386)

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E-1 - Koombooloomba Dam – Dam Break Analysis – Sunny Day Failure

Koombooloomba Dam Dam Break Analysis Sunny Day Failure -Rubber Dam 12 Picnic Area D/S Dam, AMTD 98.6 km Tully Falls Diversion Weir, AMTD 89.0 km U/S Tully Falls, AMTD 88.3 km Kareeya PS - West, AMTD 85.0 km 10 Kareeya PS - East, AMTD 84.8 km Picnic/Camping Ground, AMTD 74.3 km Tully River Bridge, AMTD 70.4 Road Crossing, AMTD 57.5 km Weary Pocket, AMTD 54.5 km 8 Jarra Creek Junction, AMTD 30.9 km Bruce Highway - Euramo, AMTD 17.5 km

6 Flood Depth (m) Flood Depth

0 0-00 0-03 0-06 0-09 0-12 0-15 0-18 0-21 1-00 1-03 1-06 1-09 1-12 1-15 1-18 1-21 2-00 2-03 2-06 2-09 2-12 2-15 2-18 2-21 3-00 3-03 3-06 Time (day-hour)

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E-2 - Koombooloomba Dam – Dam Break Analysis – Rubber Dam Failure in Flood

Koombooloomba Dam Dam Break Analysis Rubber Dam Failure During a Flood event 12 Picnic Area D/S Dam, AMTD 98.6 km Tully Falls Diversion Weir, AMTD 89.0 km U/S Tully Falls, AMTD 88.3 km Kareeya PS - West, AMTD 85.0 km 10 Kareeya PS - East, AMTD 84.8 km Picnic/Camping Ground, AMTD 74.3 km Tully River Bridge, AMTD 70.4 Road Crossing, AMTD 57.5 km Weary Pocket, AMTD 54.5 km 8 Jarra Creek Junction, AMTD 30.9 km Bruce Highway - Euramo, AMTD 17.5 km

6 Flood Depth (m) Flood Depth

0 0-00 0-03 0-06 0-09 0-12 0-15 0-18 0-21 1-00 1-03 1-06 Time (day-hour)

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E-3 - Koombooloomba Dam – Dam Break Analysis – Sunny Day Failure Main Dam

Koombooloomba Dam Dam Break Analysis Sunny Day Failure -Main Dam 32 Picnic Area D/S Dam, AMTD 98.6 km 30 Tully Falls Diversion Weir, AMTD 89.0 km U/S Tully Falls, AMTD 88.3 km 28 Kareeya PS - West, AMTD 85.0 km Kareeya PS - East, AMTD 84.8 km 26 Picnic/Camping Ground, AMTD 74.3 km Tully River Bridge, AMTD 70.4 24 Road Crossing, AMTD 57.5 km Weary Pocket, AMTD 54.5 km 22 Jarra Creek Junction, AMTD 30.9 km Bruce Highway - Euramo, AMTD 17.5 km 20

Flood Depth (m) Flood Depth 12

0 0-00 0-03 0-06 0-09 0-12 0-15 0-18 0-21 1-00 1-03 1-06 1-09 1-12 1-15 1-18 1-21 2-00 2-03 2-06 2-09 2-12 2-15 2-18 2-21 3-00 3-03 3-06 Time (day-hour)

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E-4 - Koombooloomba Dam – Dam Break Analysis – PMP Design Flood Main Dam

Koombooloomba Dam Dam Break Analysis PMP Design Flood -Main Dam Failure 32 Picnic Area D/S Dam, AMTD 98.6 km 30 Tully Falls Diversion Weir, AMTD 89.0 km U/S Tully Falls, AMTD 88.3 km 28 Kareeya PS - West, AMTD 85.0 km Kareeya PS - East, AMTD 84.8 km 26 Picnic/Camping Ground, AMTD 74.3 km Tully River Bridge, AMTD 70.4 24 Road Crossing, AMTD 57.5 km Weary Pocket, AMTD 54.5 km 22 Jarra Creek Junction, AMTD 30.9 km 20 Bruce Highway - Euramo, AMTD 17.5 km

Flood Depth (m) Flood Depth 12

0 0-00 0-03 0-06 0-09 0-12 0-15 0-18 0-21 1-00 1-03 1-06 1-09 1-12 1-15 1-18 1-21 2-00 2-03 2-06 2-09 2-12 2-15 2-18 2-21 3-00 3-03 3-06 Time (day-hour)

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E-5 - Koombooloomba Dam – Dam Break Analysis – PMP Design Flood No Failure

Koombooloomba Dam Dam Break Analysis PMP Design Flood -No Failure 32 Picnic Area D/S Dam, AMTD 98.6 km 30 Tully Falls Diversion Weir, AMTD 89.0 km U/S Tully Falls, AMTD 88.3 km 28 Kareeya PS - West, AMTD 85.0 km Kareeya PS - East, AMTD 84.8 km 26 Picnic/Camping Ground, AMTD 74.3 km Tully River Bridge, AMTD 70.4 24 Road Crossing, AMTD 57.5 km Weary Pocket, AMTD 54.5 km 22 Jarra Creek Junction, AMTD 30.9 km Bruce Highway - Euramo, AMTD 17.5 km 20

Flood Depth (m) Flood Depth 12

0 0-00 0-03 0-06 0-09 0-12 0-15 0-18 0-21 1-00 1-03 1-06 1-09 1-12 1-15 1-18 1-21 2-00 2-03 2-06 2-09 2-12 2-15 2-18 2-21 3-00 3-03 3-06 Time (day-hour)

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APPENDIX F: Inundation Plots

F-1 KAR520659-001A: Area overview to identify specific locations on river annotated in EAP, F-2 KAR520659-002A: Area overview to identify specific locations on river annotated in EAP, F-3 KAR520661-006A: Rubber Dam Flood Failure, U/S of Tully Falls, (TRC Area) F-4 KAR520661-005A: Sunny Day Failure, U/S of Tully Falls, (TRC Area) F-5 KAR520661-001A: Probable Maximum Precipitation Design Flood Failure, U/S of Tully Falls, (TRC Area) F-6 Map – Rubber Dam Failure Overview below Tully Falls, F-7 Map – Rubber Dam Failure Map 1, F-8 Map – Rubber Dam Failure Map 2, F-9 Map – Rubber Dam Failure Map 3, F-10 Map – Sunny Day Failure Overview below Tully Falls, F-11 Map – Sunny Day Failure Map 1, F-12 Map – Sunny Day Failure Map 2, F-13 Map – Sunny Day Failure Map 3, F-14 Map – Sunny Day Failure Map 4, (CCRC Area) F-15 Map – Sunny Day Failure Map 5, F-16 Map – PMPDF Failure / No Failure Overview below Tully Falls, F-17 Map – Effected Property & Dwelling Detailed Information, F-18 Map – PMPDF Failure / No Failure Map 1, F-19 Map – PMPDF Failure / No Failure Map 2, F-20 Map – PMPDF Failure / No Failure Map 3, F-21 Map – PMPDF Failure / No Failure Map 4, F-22 Map – PMPDF Failure / No Failure Map 5, F-23 Map – PMPDF Failure / No Failure Map 6,

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F-1

This drawing is to be used to identify specific locations on the Tully River annotated in this EAP, not as an inundation map

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F-2

This drawing is to be used to identify specific locations on the Tully River annotated in this EAP, not as an inundation map

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F-3

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APPENDIX G: Modified Mercalli Intensity Scale (Earthquake)

Average Average Value Peak Richter Peak Description Intensity Acceleratio Scale Velocity (MM) n Equivalent (cm/s) (g=9.8m/s2)

Not felt except by a very few under I especially favourable circumstances.

Felt only by a few persons at rest, especially on upper floors of buildings. II Delicately suspended objects may swing. 0 – 4.3 Felt quite noticeably indoors, especially on upper floors of buildings, but many people do not recognise it as an III earthquake. Standing automobiles may rock slightly. Vibrations like a passing truck. Duration estimated

During the day felt indoors by many, outdoors by few. At night some awakened. Dishes, windows, doors disturbed; walls make creaking sound. 0.015g – 1 -2 IV Sensation like heavy truck striking 0.02g building. Standing automobiles rocked noticeably. 4.3 – 4.8 Felt by nearly everyone, many awakened. Some dishes, windows and so on broken; cracked plaster in a few 0.03g – 2 - 5 V places; unstable objects overturned. 0.04g Disturbances of trees, poles and other tall objects sometime noticed. Pendulum clocks may stop.

Felt by all, many frightened and run outdoors. Some heavy furniture moved; a 0.06g – 5 - 8 VI few instances of fallen plaster and 0.07g damaged chimneys. Damage slight.

Everybody runs outdoors. Damage 4.8 – 6.2 negligible in buildings of good design and construction; slight to moderate in well- 0.10g – 8 - 12 VII built ordinary structures; considerable in 0.15g poorly built or badly designed structures; some chimneys broken. Noticed by persons driving cars.

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Average Average Value Richter Peak Peak Description Intensity Scale Velocity Acceleration (MM) Equivalent (cm/s) (g=9.8m/s2)

Damage slight in specially designed structures; considerable in ordinary substantial buildings with partial collapse; great in poorly built structures. Panel walls thrown out of frame structures. Fall of chimneys, factory 0.25g – 20 - 30 VIII stacks, columns, monuments and walls. 0.30g Heavy furniture overturned. Sand and mud ejected in small amounts. Changes in well water. Persons driving cars disturbed.

Damage considerable in specially designed structures; well-designed frame structures thrown out of plumb; 6.2 – 7.3 great in substantial buildings with partial 0.50g – 45 – 55 IX collapse. Buildings shifted off 0.55g foundations. Ground cracked conspicuously. Underground pipes broken.

Some well-built wooden structures destroyed; most masonry and frame structures destroyed with foundations; ground badly cracked. Rails bent. More More than X Landslides considerable for riverbanks than 60 0.60g and steep slopes. Shifted sand and mud. Water splashed, slopped over banks.

Few, if any (masonry) structures remain standing. Bridges destroyed. Broad fissures in ground. Underground XI pipelines completely out of service. Earth slumps and land slips in soft ground. Rails bent greatly. 7.3 – 8.9

Damage total. Waves seen on ground surface. Lines of sight and level XII distorted. Objects thrown into the air.

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APPENDIX H: Potential Materials & Equipment Suppliers

1. Kidner Contracting Pty Ltd, Carrick Street, Ravenshoe, Q4872 ph. 4097 6766

2. Cattle Camp Quarry Wongabel Road, Atherton, Q4883 ph. 4095 8335

3. Dempsey Cranes Pty Ltd, Carrick Street, Ravenshoe, Q4872 ph. 4097 7812

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APPENDIX I: Koombooloomba Dam EAP Notification Information Template

Who is to be notified: Cairns Police Communication Centre TRC LDMG CC LDMG CleanCo CCQ (Crisis Communication Team) Director Dam Safety (DNRME) Message; Hello (agency/contact) this is (KPSM or Delegate), Koombooloomba Dam is experiencing (event type) and the Emergency Action Plan has been activated at (activation level i.e. ALERT) and the following information is pertinent for your agency response to the situation. Please repeat this information back to me at the end of this message to confirm you have received all information correctly.

Thank you, do you have any further questions; - - - Emergency Event Condition : (Type of Event e.g.: #1-Heavy rainfall Rubber Dam inflated, #5- Earthquake) Information as of : (Time and Date) Description of Event : Weather conditions and rainfall in Catchment – Rate of rise in Reservoir if known – If / When Spillway overflowed – Peak level and Time – Briefly describe any known immediate downstream damage - Any other relevant information;

Statistics Current Inflow – Maximum Inflow - Maximum Discharge - Total Discharge (if available) - Current Capacity and Volume of Reservoir - Capacity and Volume of Reservoir prior to event - Event Progress (Briefly describe the daily rate of rise, time to peak level and weather conditions.)

General Comments (e.g. Number of recreational river users identified or commercial river operators’ max numbers.)

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APPENDIX J: Koombooloomba Dam Emergency Alert Request Form Template

J-1. EA Template #1 / Watch & Act

EMERGENCYc ALERT REQUEST FORM Date Time

Incident/Event:

Koombooloomba Dam Emergency Event // (event # and description)// EMERGENCY ALERT Requesting Officer: Contact Details: REQUEST Kareeya Power Station Manager

March 2015 Prepared By: Position: Kareeya Power Station Manager

Event Type Cyclone Flash Flood Flood Storm Surge Tsunami* Bushfire Chemical Spill Fire Incident Smoke or Toxic Plume Other (please specify): Dam Emergency Event *NB. Tsunami EA campaigns will be sent as Location Based Text Message ONLY Message Severity Emergency Warning** Watch & Act Advice **N.B. activates the SEWS Campaign Mode Voice SMS – Location Based SMS – Service Address Based LDMG Advised? YES NO DDC Advised? YES NO Threat Direction Required? YES NO Note: Can only be used for Emergency Warnings. Indicate direction on map

1. EA Polygon Area: Map attached

2. Spatial format: Use only these file Indicate the format used: For spatial data, is it ESRI extensions: supplied via GML *.dbf, *.prj, *.shp, *.shx DMportal - specify filenames below KML *.gml, *.xsd *.kml FTP - specify filenames MapInfo TAB below *.dat, *.id, *.map, *.tab MapInfo Mid/Mif Filename: Email *.MIDI Sequence, *.mif Other (please specify) 3. Handwrite (please use capitals for clarity) or Type Voice message (Ideally message should be less than 450 characters). Emergency Emergency This is a Flash Flood Watch and Act from Koombooloomba Dam management. Properties beside Tully River and overflow areas may experience rapidly rising water levels, with property inundation posing a danger to residents. Access roads and bridges may also be impacted and properties isolated. You should warn neighbours, secure belongings and move to higher ground. For more information visit w w w dot DNRME dot q l d dot gov dot a u

4. Type or handwrite SMS below (maximum of 160 characters including spaces) Flash Flood Watch & Act from Koombooloomba Dam management for Tully river area-possible impact to life/property-warn others- leave area now-move to higher ground

Manual Transmission: For use by SDCC EMS Transmission: Authorising Officer Name: EMS Report ID: EA User Name: ______

EA Guidelines and the Emergency Alert Request Form Template are available at: www.disaster.qld.gov.au

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J-2. EA Template #2 / Emergency Warning

EMERGENCYc ALERT REQUEST FORM Date Time

Incident/Event:

Koombooloomba Dam Emergency Event // (event # and description)// EMERGENCY ALERT Requesting Officer: Contact Details: REQUEST Kareeya Power Station Manager

March 2015 Prepared By: Position: Kareeya Power Station Manager

1. EA Polygon Area: Map attached

2. Spatial format: Use only these file Indicate the format used: For spatial data, is it ESRI extensions: supplied via GML *.dbf, *.prj, *.shp, *.shx DMportal - specify filenames below KML *.gml, *.xsd *.kml FTP - specify filenames MapInfo TAB below *.dat, *.id, *.map, *.tab MapInfo Mid/Mif Filename: Email *.MIDI Sequence, *.mif Other (please specify) 3. Handwrite (please use capitals for clarity) or Type Voice message (Ideally message should be less than 450 characters). Emergency Emergency This is a Flash Flood Warning from Koombooloomba Dam management. Properties beside the Tully River and overflow areas are likely to experience rapidly rising water levels, with property inundation posing an immediate danger to residents. Access roads and bridges may also be impacted and properties isolated. You should warn neighbours and move to higher ground. For more information visit w w w dot DNRME dot q l d dot gov dot a u

4. Type or handwrite SMS below (maximum of 160 characters including spaces)

Flash Flood Warning from Koombooloomba Dam management for the Tully river area-likely impact to life/property-warn others- leave area now-move to higher ground

Manual Transmission: For use by SDCC EMS Transmission: Authorising Officer Name: EMS Report ID: EA User Name: ______

EA Guidelines and the Emergency Alert Request Form Template are available at: www.disaster.qld.gov.au

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APPENDIX K: Koombooloomba Dam Emergency Alert Boundary Polygon Templates

K-1 Polygon 1 - Rubber Dam Failure EA Polygon Template K-2 Polygon 2 – Sunny Day Failure EA Polygon Template K-3 Polygon 3 – Probable Maximum Precipitation Design Flood EA Polygon Template

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K-1

Polygon 1 - Rubber Dam Failure EA Polygon Template

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K-2

Polygon 2 – Sunny Day Failure EA Polygon Template

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K-3

Polygon 3 – Probable Maximum Precipitation Design Flood EA Polygon Template

Appendix L has been redacted

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