Burdekin Falls Dam

Prepared by Sunwater Limited

Emergency Action Plan—Burdekin Falls Dam

Issue: 8.2 Date: September 2020 Project: Burdekin Falls Dam EAP File no.: 08-000358/001

Rural no.: 11950 Burdekin Falls Dam Road Location: Lat. -20.642015o Lon. 147.141178o o o 20 38’31.17”S 147 08’28.16”E

DISCLAIMER: This report has been produced by Sunwater to provide information for client use only. The information contained in this report is limited by the scope and the purpose of the study, and should not be regarded as completely exhaustive. This report contains confidential information or information which may be commercially sensitive. If you wish to disclose this report to a third party, rely on any part of this report, use or quote information from this report in studies external to the Corporation, permission must first be obtained from the Chief Executive, Sunwater.

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Emergency activation quick reference – Dam Hazards The Emergency Action Plan (EAP) for Burdekin Falls Dam covers six dam hazards evaluated within Sunwater’s Dam Safety Management Program. Use the following table to select the relevant section of the EAP that deals with the dam hazard. Note: The Incident Coordinator (IC) is responsible for the decision to activate the EAP. Should the IC be unavailable, the Local Event Coordinator (LEC) or Dam Duty Officer (DDO) is responsible for the decision. Table 1: Emergency activation quick reference

Activation levels

Dam Hazards and Alert Lean Forward Stand Up Stand Down section numbers • Locally managed (DDO) • Locally managed (DDO and IC) • Locally managed (DDO and IC) with advice • Locally managed (DDO and IC) with advice from Owner’s Rep/DSTDM from Owner’s Rep/DSTDM Activation triggers for dam hazards Flood operations • EL 153.90m and rising (0.1m below FSL) • Storage above FSL 154.00m • Storage above EL 157.00m • Storage level EL 154.30m and falling See section 5 Overturning/sliding of • Indications of movement of monoliths noted • Storage level at flood of record EL 160.85m, • Obvious displacement of one or more • Risk assessment has determined that sliding or monoliths such as cracking, increased seepage, opening OR monoliths, OR overturning risk has reduced See Section 6 of joints • Increase in movement, pressures, or seepage • Evidence of scouring at or near toe of dam, OR • Storage Level at stability factor of safety 1.3, EL 167.49m Chemical spill/toxic • Reports of contamination or potential • Not applicable • Confirmation or high probability of a large • Risk assessment that risk has reduced conditions contamination in the catchment area of the amount of chemical spill/toxic conditions found • Confirmation that significant contamination has See section 7 storage (excludes normal operating and in the storage/catchment not occurred monitoring of BGA) • All clear WQ test result • Escalated BGA or toxic condition from the Sunwater Environmental group Piping: embankment, • Increasing leakage through an embankment, • Increasing leakage through an embankment, • Piping condition has been established • Risk assessment has determined that piping foundation, or the foundations, or abutments the foundations, or abutments with cloudy risk has reduced abutments water See section 8 Earthquake • Earthquake reported or felt in the area, AND • Earthquake reported or felt in the area, AND • Earthquake reported or felt in the area, AND • Risk assessment has determined that failure See section 9 • Intensity less than 5 Modified Mercalli (MM) • Intensity greater than or equal to 5MM, OR • A possible failure path has been identified risk has reduced • Intensity less than 5MM and change detected during surveillance inspection NOTE: EMERGENCY ACTIVATION QUICK REFERENCE CONTINUED NEXT PAGE

ALL ACTION MUST BE TAKEN WHEN IT IS SAFE TO DO SO 13 15 89 Sunwater Customer e.g., taking photographs/video, dam inspections, instrument readings ! ALL PHOTOS MUST BE DATE STAMPED Support 24-hour contact line Page i

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Table1: Emergency activation quick reference (continued)

Activation levels

Emergency activation quick reference – Other Emergency Situations The EAP for Burdekin Dam covers one other emergency situation evaluated within Sunwater’s Dam Safety Management Program. Use the following table to select the relevant section of the EAP that deals with the other emergency situation. Note: The Incident Coordinator (IC) is responsible for the decision to activate the EAP. Should the IC be unavailable, the Local Event Coordinator (LEC) or Dam Duty Officer (DDO) is responsible for the decision. Table 1: Emergency activation quick reference (continued)

Activation levels

Other Emergency Communications Failure – Dam Site (DDO) Communications Failure – Local Area (LEC/SM) Communications Failure – Brisbane (IC/DSTDM) Situations and section numbers • Site managed (DDO - becomes LEC) • Brisbane managed by Incident Coordinator (IC) • Locally managed by Local Event Coordinator (LEC) Activation triggers for other emergency situations Comms Failure • Unable to communicate to or from Dam site • Unable to communicate to or from Local Area • Unable to communicate to or from Sunwater Brisbane See section 11

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Table of contents Emergency activation quick reference – Dam Hazards ...... i Emergency activation quick reference – Other Emergency Situations ...... ii Document control ...... viii Document revision history ...... ix Controlled document distribution list ...... x 1. References, abbreviations, and definitions ...... 1 1.1 References/associated documents ...... 1 1.2 Abbreviations and acronyms ...... 2 1.3 Business terms and definitions ...... 3 2. Introduction ...... 7 2.1 Context ...... 7 2.2 Purpose ...... 8 2.3 Scope ...... 8 2.4 Sunwater provides training ...... 8 2.5 Principles used in developing this EAP ...... 9 2.6 Community information ...... 11 2.7 Sunwater lessons learnt ...... 11 2.8 Downstream notifications lists ...... 11 2.9 Comprehensive Risk Assessments ...... 11 3. Dam details ...... 12 3.1 General Dam Information ...... 12 3.2 Population at risk ...... 13 3.3 Spillway adequacy ...... 13 3.4 General arrangement ...... 13 3.5 Emergency inspections and monitoring ...... 14 4. Roles and responsibilities ...... 15 5. Dam hazard—flood operations ...... 18 5.1 Overview ...... 18 5.2 Emergency actions...... 20 6. Dam hazard—overturning or sliding of monoliths ...... 30 6.1 Overview ...... 30 6.2 Emergency action roles ...... 30 7. Dam hazard—chemical spill/toxic conditions ...... 39 7.1 Overview ...... 39 7.2 Emergency action roles ...... 39

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8. Dam hazard—piping: Saddle/Main Dam embankment, foundation, or abutments...... 46 8.1 Overview ...... 46 8.2 Emergency action roles ...... 46 9. Dam hazard—earthquake ...... 54 9.1 Overview ...... 54 9.2 Emergency action roles ...... 54 10. Dam hazard—terrorist threat/activity or high energy impact ...... 62 10.1 Overview ...... 62 10.2 Emergency action roles ...... 62 11. Other emergency situation—communications failure ...... 70 11.1 Overview ...... 70 11.2 Emergency actions...... 70 Appendix A Notification and communication lists ...... A1 Appendix B Drawings, maps and emergency control measures ...... B1 Appendix C Equipment and technical information ...... C1 Appendix D Burdekin Falls Dam Emergency Action Plan toolkit ...... D1 Appendix E Interaction with local government and district groups ...... E1

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List of tables Table 1: Emergency activation quick reference ...... i Table 2: Burdekin Falls Dam specifications ...... 12 Table 3: Flood classification triggers ...... 19 Table 4: Historical floods experienced at Burdekin Falls Dam ...... 19 Table 5: Flood emergency activation trigger summary ...... 20 Table 6: Flood operations—DDO emergency action ...... 21 Table 7: Flood operations—LEC emergency action ...... 23 Table 8: Flood operations—IC emergency action ...... 24 Table 9: Flood operations—LEC and IC communication plan ...... 25 Table 10: Flood operations—DSTDM emergency action ...... 28 Table 11: Flood operations—FODM emergency action ...... 29 Table 12: Overturning or sliding of monoliths—DDO emergency action ...... 32 Table 13: Overturning or sliding of monoliths—LEC emergency action ...... 33 Table 14: Overturning or sliding of monoliths—IC emergency action ...... 34 Table 15: Overturning or sliding of monoliths—LEC and IC communication plan ...... 35 Table 16: Overturning or sliding of monoliths—DSTDM emergency action ...... 38 Table 17: Chemical spill/toxic conditions—DDO emergency action ...... 41 Table 18: Chemical spill/toxic conditions—LEC emergency action ...... 42 Table 19: Chemical spill/toxic conditions—IC emergency action ...... 43 Table 20: Chemical spill/toxic conditions—LEC and IC communication plan ...... 44 Table 21: Chemical spill/toxic conditions—DSTDM emergency action ...... 45 Table 22: Piping: Saddle/Main Dam embankment, foundation, or abutments—DDO emergency action ...... 48 Table 23: Piping: Saddle/Main Dam embankment, foundation, or abutments—LEC emergency action ...... 49 Table 24: Piping: Saddle/Main Dam embankment, foundation, or abutments—IC emergency action ...... 50 Table 25: Piping: Saddle/Main Dam embankment, foundation, or abutments—LEC & IC communication plan ...... 51 Table 26: Piping: Saddle/Main Dam embankment, foundation, or abutments—DSTDM emergency action ...... 53 Table 27: Earthquake—DDO emergency action ...... 56 Table 28: Earthquake—LEC emergency action ...... 57 Table 29: Earthquake—IC emergency action ...... 58 Table 30: Earthquake—LEC and IC communication plan ...... 59 Table 31: Earthquake—DSTDM emergency action ...... 60 Table 32: Terrorist threat/activity or high energy impact—DDO emergency action ...... 64 Table 33: Terrorist threat/activity or high energy impact—LEC emergency action ...... 65 Table 34: Terrorist threat/activity or high energy impact—IC emergency action ...... 66 Table 35: Terrorist threat/activity or high energy impact—LEC and IC communication plan ...... 67 Table 36: Terrorist threat/activity or high energy impact—DSTDM emergency action ...... 69

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Table 37: Communications failure emergency activation trigger summary ...... 70 Table 38: Communications failure—DDO emergency action ...... 71 Table 39: Communications failure—LEC emergency action...... 72 Table 40: Communications failure—IC emergency action ...... 73 Table 41: Communications failure—LEC and IC communication plan ...... 74 Table 42: Communications failure—DSTDM emergency action ...... 75 Table 43: Communications failure—FODM emergency action ...... 76

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List of figures Figure 1: Sunwater emergency response organisation ...... 10 Figure 2: Overturning or sliding of monoliths flowchart ...... 31 Figure 3: Chemical spill/toxic conditions flowchart...... 40 Figure 4: Piping: Saddle/Main Dam embankment, foundation, or abutments flowchart ...... 47 Figure 5: Earthquake flowchart ...... 55 Figure 6: Terrorist threat/activity or high energy impact flowchart ...... 63 Figure A1: Emergency alert polygon ...... A11 Figure B1: Burdekin Falls Dam general arrangement ...... B2 Figure B2: Burdekin Falls Dam instrument layout ...... B3 Figure B3: Burdekin Falls Dam flood impact mapping ...... B5 Figure B4: Burdekin Falls Dam locality plan...... B14 Figure B5: Burdekin Falls Dam declared catchment boundary plan ...... B15 Figure C1: Burdekin Falls Spillway discharge curve ...... C3 Figure C2: Burdekin Falls Dam storage curve ...... C4

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Document revision history

Version Date Prepared by Reason for change Hummingbird #

2 February 2008 Substantial review of Burdekin Falls Dam Emergency Action Plan to reflect Sunwater Management structure and updated inundation maps. 3 October 2011 Significant changes to all sections of HB # 608675 Burdekin Falls Dam Emergency Action Plan to reflect current Sunwater Management structure and other changes. 4 October 2015 New Emergency Action Plan developed HB # 1685284 at expiry of 3E approval. Issued for consultation with Relevant Disaster Management Groups. 5 September 2016 Updates to notification & communication HB # 2022753 lists and Emergency Alert sections. 6 October 2017 New Emergency Action Plan developed HB # 2223834 with contact list updates and minor amendments. 7 July 2018 Revised and reviewed Emergency Action HB # 2095187 Plan includes; updates that reflect the Water Legislation (Dam Safety) Amendment Act 2017, implementation of changes to Sunwater management structure, new event management roles and addition of new Emergency Activation section (Other Emergency Situations). 8 December 2018 Amended contacts and associated HB # 2367477 sections, e.g. Organisation chart & Controlled Copy Holders list. Minor error corrections and other non-substantive changes. 8.1 September 2019 Yearly update of contacts and associated HB # 2460892 sections, e.g. Organisation chart & Controlled Copy Holders list. Minor error corrections and other non-substantive changes. 8.2 September 2020 Yearly update of contacts and associated HB # 2570611 sections, e.g. Organisation chart & Controlled Copy Holders list. Minor error corrections and other non-substantive changes.

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Controlled document distribution list

Copy Position Location no. 1 Storage Supervisor Sunwater, Burdekin Falls Dam 2 Operations Manager—Burdekin Sunwater, Clare 3 Principal Dam Safety Engineer Sunwater, Brisbane 4 Local Disaster Coordinator—Local Disaster Management Group Burdekin Shire Council (LDMG 1) 5 Local Disaster Coordinator—Local Disaster Management Group Charters Towers Regional (LDMG 2) Council 6 Local Disaster Coordinator—Local Disaster Management Group Whitsunday Regional Council (LDMG 3) 7 Officer in Charge—Ayr Police Police, Ayr 8 Officer in Charge—Home Hill Police Police, Home Hill 9 Officer in Charge—Clare Police Police, Clare 10 District Disaster Coordinator—Townsville District Disaster Police, Townsville Management Group (DDMG 1) 11 Assistant Commissioner—Northern Region, Queensland Fire Townsville and Emergency Service 12 Emergency Management Coordinator—Queensland Fire and Townsville Emergency Services 13 Executive Officer—Mackay District Disaster Management Group Police, Mackay (DDMG 2) Notes: Communication information for each ‘Controlled Copy Holder’ is attached in Appendix A.

Electronic document distribution list

Printed electronic copies are considered uncontrolled copies.

Position Location Chief Executive Department of Natural Resources, Mining and Energy, Brisbane Senior Flood Forecaster Bureau of Meteorology, Brisbane Note: Communication information for each ‘Electronic Copy Holder’ is in Appendix A.

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1. References, abbreviations, and definitions

1.1 References/associated documents

Ref. Document title Reference/location A Strategic Response Manual http://simon.sunwater.com.au/policies-and- forms/crisis-management-emergency-response-plans- business-continuity/RM00-Sunwater-Strategic- Response-Manual.pdf B Burdekin Falls Dam Operation and Burdekin_Falls_Dam_OM_Manual Maintenance Manual C Burdekin Falls Dam Safety Condition Schedule HB # 05-009144/003 D Queensland Disaster Management Guidelines http://www.disaster.qld.gov.au E Inundation/Flooding of Public Roads Policy http://simon.sunwater.com.au/policies-and- forms/property-management/policies F Queensland Rainfall and River Conditions http://www.bom.gov.au/qld/flood/index.shtml?ref=hdr (Flood Warning) G Incident and Near Miss Alert Form http://simon.sunwater.com.au/policies-and- (Alert Notification) forms/online/incident-and-near-miss-alert H Emergency Alert Protocol HB # 15-001003/001 I Blue Green Algae (BGA) Monitoring Program http://simon.sunwater.com.au/policies-and- Manual (EM29) forms/environmental-management/blue-green-algae

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1.2 Abbreviations and acronyms AEP Annual Exceedance Probability MM Modified Mercalli AHD Australian Height Datum O&M Operation & Maintenance AMTD Adopted Mean Thread Distance OB Observation Bore ANCOLD Australian National Committee on OC Operations Centre Large Dams OCO Operations Coordinator BOM Bureau of Meteorology OM Operator Maintainer CED Chief Engineer Dams OMGR Operations Manager CEO Chief Executive Officer OS Operations Supervisor CRA Comprehensive Risk Assessment ORR Owner’s Regional Representative CTG Counter Terrorism Group PAR Population at Risk D/S Downstream PDSE Principal Dam Safety Engineer DCF Dam Crest Flood PFRM Predictive Flood Routing Model DCL Dam Crest Level PLL Probable Loss of Life DDC District Disaster Coordinator PMF Probable Maximum Flood DDMG District Disaster Management Group PMP Probable Maximum Precipitation DDMP District Disaster Management Plan PMPDF Probable Maximum Precipitation DDO Dam Duty Officer Design Flood DDS Director Dam Safety PWRE Principal Water Resources Engineer DNRME Department of Natural Resources, QDMC Queensland Disaster Management Mines & Energy Committee DSR Dam Safety Regulator QFES Queensland Fire & Emergency Services DSSC Dam Safety Surveillance Coordinator QPS Queensland Police Service DSTDM Dam Safety Technical Decision Maker RB Right Bank EAP Emergency Action Plan RC Regional Council EA Emergency Alert RCC Roller Compacted Concrete EER Emergency Event Report ROC Regional Operations Centre EGMO Executive General Manager Operations RPEQ Registered Professional Engineer of EGMWR&DS Executive General Manager Water Queensland Resources & Dam Safety RSL Reduced Supply Level EL Elevation Level SCED Senior Civil Engineer Dams FCL Fixed Crest Level SCTN Security and Counter Terrorism Network FODM Flood Operations Decision Maker SDCC State Disaster Coordination Centre FSL Full Supply Level SDF Sunny Day Failure GM General Manager SDTE Senior Dam Technical Engineer IC Incident Coordinator SES State Emergency Service IFHC Incremental Flood Hazard Category SMS Short Message Service IGEM Inspector-General Emergency SMT Sunwater Media Team Management SO Standby Operator LB Left Bank SOP Standard Operating Procedure LDC Local Disaster Coordinator SRT Strategic Response Team LDMG Local Disaster Management Group SS Storage Supervisor LDMP Local Disaster Management Plan SWL Storage Water Level LEC Local Event Coordinator SWRE Senior Water Resources Engineer MAP Manager Asset Planning U/S Upstream Max. OL Maximum Operating Level WHS Workplace Health & Safety ME Manager Environment WQ Water Quality

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1.3 Business terms and definitions The meaning of terms used in this section are set out in accordance with relevant legislation or as defined by operator requirements.

Term Definition Terms set out in section 352A of the Water Supply (Safety and Reliability) Act 2008 (Qld) - Amended Dam hazard Means a reasonably foreseeable situation or condition that may: • cause or contribute to the failure of the dam, if the failure may cause harm to persons or property, OR • 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 Means an event arising from a dam hazard if: • persons or property may be harmed because of the event, AND • a coordinated response, involving 2 or more of the following relevant entities, is unlikely to be required; each local group and district group for the EAP, each local government whose area may be affected, the chief executive, another entity the owner of the dam considers appropriate, AND • the event is not an emergency event. Disaster management plan Of a district group or local government, means the group’s or local government’s disaster management plan under the Disaster Management Act. District group For an emergency action plan (EAP), means a district group established under the (District Disaster Disaster Management Act, section 22 whose disaster district under that Act could, Management Group) under the plan, be affected by a dam hazard. Emergency event Means an event arising from a dam hazard if: • persons or property may be harmed because of the event, AND • any of the following apply: - a coordinated response, involving 2 or more of the following relevant entities, is likely to be required; each local group and district group for the EAP, each local government whose area may be affected, the chief executive, another entity the owner of the dam considers appropriate, OR - the event may arise because of a disaster situation declared under the Disaster Management Act, OR - an entity performing functions under the State disaster management plan may, under that plan, require the owner of the dam to give the entity information about the event. Local group For an EAP, means a local group established under the Disaster Management Act, (Local Disaster section 29 whose local government area could, under the plan, be affected by a Management Group) dam hazard. Notice response A dam owner’s written response to a notice following an assessment of an EAP by a local government or district group.

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Term Definition Referable dam A dam, or a proposed dam after its construction, will be a referable dam if: • a failure impact assessment of the dam, or the proposed dam, is carried out under the Act, AND • the assessment states the dam has, or the proposed dam after its construction will have, a category 1 or category 2 failure impact rating, AND • the chief executive has, under section 349 of the Act, accepted the assessment. Also, a dam is a referable dam if: • under section 342B of the Act, the owner of a dam is given a referable dam notice and, before the effective day for the notice, does not give the chief executive a failure impact assessment for the dam, AND • the chief executive has not, under section 349 of the Act, accepted a failure impact assessment of the dam. Relevant entity Means each of the following under the EAP for the dam: • the persons who may be affected, or whose property may be affected, if a dam hazard event or emergency event were to happen for the dam, e.g. the owners of parcels of farm land adjacent to the dam or residents of a township • each local group and district group for the EAP • each local government whose local government area may be affected if a dam hazard event or emergency event were to happen • the chief executive • another entity the owner of the dam considers appropriate e.g., the Queensland Police Service. Terms consistent with Queensland Disaster Management Arrangements: Activation levels The four levels of EAP activation are: • Alert: A heightened level of vigilance due to the possibility of an event occurring. No further action may be required; however, the situation should be monitored by someone capable of assessing the potential of the threat. Moving to an Alert level indicates the dam owner is getting ready to activate the Lean Forward level of the EAP if the situation deteriorates. • Lean Forward: An operational state characterised by a heightened level of situational awareness of an impending disaster event and a state of operational readiness. Disaster coordination centres are on standby and prepared but not activated. • Stand Up: The operational state where resources are mobilised, personnel are activated, and operational activities commenced. Disaster coordination centres are activated. The dam owner needs to provide an Emergency Event Report (EER) in accordance with the provision of the Act. • Stand Down: Transition from responding to an event back to normal core business and/or continuance of recovery operations. There is no longer a requirement to respond to the event and the threat is no longer present. The movement through these levels of activation is not necessarily sequential. It should be applied with flexibility and adaptability and be tailored to the location and event. Triggering one of these levels of activation may not necessarily mean a similar activation of LDMGs or DDMGs.

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Term Definition Bureau of Meteorology The three levels of flooding are: 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. Chemical spill/toxic The contamination of water in the storage of the dam that could create a dam condition hazard. Concurrent Flooding Flood flows downstream of a dam that are not a result of dam outflows, for instance those from adjacent catchments or from the sea, and which occur in the same period as downstream releases or flooding from the dam. Dam crest failure Dam crest flood is when failure occurs during a flood event with the water level at the crest of the non-overflow section of the dam embankment: • for an embankment dam, is the lowest point of the embankment crest • for a concrete dam, is the level of the non-overflow section of the dam, excluding handrails and parapets if they do not store water against them • for a concrete faced rockfill dam, is the lowest point of the crest structure. Dam failure Dam failure is the physical collapse of all or part of a dam or the uncontrolled release of any of its contents. Downstream releases Downstream releases are outflows from the dam made through appurtenant structures such as spillways or outlet works that are in accordance with the design of the dam. Earthquake A sudden release of energy in the earth's crust or upper mantle, usually caused by movement along a fault plane or by volcanic activity, resulting in the generation of seismic waves that can be destructive. The potential consequences of an earthquake include: • settlement, sliding, or overturning of monoliths in the dam wall • initiation of seepage lines in the foundations or abutments that could lead to piping damage and potential inoperability of appurtenant works. Flood release A flood release from a dam occurs when catchment inflows raise the storage level above the Full Supply Level (FSL) resulting in a discharge from the spillway of the dam. Piping Internal scour caused by the water flow and seepage that occurs through earth dams, dam foundations, or dam abutments. The internal scour can lead to the formation of a pipe, which can lead to a failure of the dam. Plane strike or other The impact of a plane, meteorite, or other high energy item on or in close vicinity of impact a dam that could damage the dam structure or create a wave that could overtop the dam. Probable maximum flood Probable maximum flood is the flood resulting from probable maximum precipitation coupled with the worst catchment conditions that can be realistically expected.

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Term Definition Probable maximum Probable maximum precipitation is the theoretical greatest depth of precipitation precipitation physically possible based on generalised methods. Probable maximum Probable maximum precipitation design flood is the flood resulting from probable precipitation design flood maximum precipitation coupled with standard catchment conditions that can be expected. ‘Sunny day’ failure ‘Sunny day’ dam failure is where the failure occurs at the full supply level and there is no concurrent rain associated flooding. Terrorist activity A deliberate attempt to damage, fail or contaminate a dam.

Note: Sunwater has attempted to write the EAP to cope with all reasonably foreseeable emergency situations. However, there is considerable uncertainty about how any emergency situation might develop and progress. Factors such as the weather, the location, the mechanics, and the rate and size of any actual failure can considerably affect any resulting flood discharges. Therefore, a significant number of assumptions have had to be made in compiling sections of the EAP. Some variation in outcome should be expected where the event differs from the assumed behaviour.

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2. Introduction 2.1 Context Under the Water Supply (Safety and Reliability) Act 2008 (the Act), the owner of a referable dam must have an approved EAP for the dam. Referable dams, by definition, would put lives at risk if they were to fail. This EAP has been prepared in accordance with Chapter 4 of the Act. The content requirements for EAPs are contained in section 352H of the Act.

spacSummary of legal requirements – Section 352H Section 352H(1) of the Act requires that the EAP must identify each dam hazard for the dam; and for each of these dam hazard types (e.g., flood operations, or chemical spill/toxic conditions): 1. identify the area likely to be affected by a dam hazard event or emergency event arising from the dam hazard; and 2. identify each circumstance that indicates a material increase in the likelihood of the dam hazard event or emergency event happening; and 3. state when and how the owner of the dam plans to warn persons who may be harmed, or whose property may be harmed by an event caused by the dam hazard, if one happens, and/or there is a material increase in the likelihood of an occurrence, including the order of priority in which the persons or categories of persons are to be warned; and 4. state when and how the owner plans to notify the relevant entities for the dam, if a dam hazard event or emergency event happens or, there is a material increase in the likelihood of such an occurrence, including the order of priority in which the relevant entities are to be notified; and 5. state the actions the owner of the dam plans to take in response to a dam hazard event or emergency event. In accordance with section 352H(2) of the Act, the EAP may provide for the dam owner to make arrangements with a relevant entity for warnings to be given by the relevant entity on behalf of the dam owner in appropriate circumstances. Section 352HA of the Act states that before giving the chief executive an EAP, the owner of the dam must give a copy of the plan to each local government whose area may be affected by a dam hazard identified in the plan; and each district group for the plan. Section 352HB of the Act states that the local government must assess the EAP for consistency with its disaster management plan. In its assessment, the local government must consult with the local district group for the plan. Within 30 business days of receiving the EAP, the local government must give the owner of the dam a notice, which states whether it considers the plan is consistent with its disaster management plan; and if not, give reason why it considers the EAP is not consistent. The EAP must include any such notices, provided to the owner of the dam by a local government (or district group); and any responses which the owner gives to these notices. Section 352H(1) further stipulates that an EAP must include any other relevant matter prescribed by regulation. The local governments whose areas may be affected by a dam hazard for Burdekin Falls Dam have been assessed as Burdekin Shire Council, Charters Towers Regional Council and Whitsunday Regional Council. Sunwater has provided the councils with a copy of the draft EAP for assessment. Section 352HC of the Act states that a district group may review the EAP for consistency with its disaster management plan. The district groups for Burdekin Falls Dam are Townsville and Mackay District Disaster Management Groups (DDMGs). Sunwater has provided the DDMGs with a copy of the draft EAP for review.

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2.2 Purpose The purpose of this EAP is: • to minimise the risk of harm to persons or property if a dam hazard event or emergency event for the dam happens • to identify dam hazards that could occur at Burdekin Falls Dam and the area likely to be affected for each hazard • to prescribe emergency actions taken by the dam owners and operating personnel in identifying and responding to dam hazards and notifying relevant entities. It is possible for more than one dam hazard condition to exist at Burdekin Falls Dam at the one time. In such a circumstance, it may be necessary to act on the procedures within separate sections simultaneously. The focus of this EAP is the management of dam hazards conditions at Burdekin Falls Dam by the owner of the dam (Sunwater) and the communication and notification of dam hazards to the LDMGs, DDMGs and broader community. However, the EAP sits within the broader emergency response framework. This EAP has been developed to be consistent with and support the objectives of the Burdekin Shire Council, Charters Towers Regional Council, and the Whitsunday Regional Council’s Local Disaster Management Plans.

2.3 Scope The Burdekin Falls Dam EAP covers: • dam hazards evaluated within Sunwater’s Dam Safety Management Program • details about the dam that are relevant to a dam hazard • identification of circumstances that indicates a material increase in the likelihood of a dam hazard • triggers for activation of a tiered response to dam hazards • roles and responsibilities in responding to a dam hazard • notification, warning, and communication protocols • inspection, monitoring, and reporting protocols during emergencies • other relevant information that may assist with identifying the area affected by a dam hazard, and the management of such hazards

2.4 Sunwater provides training • Training of the use and implementation of this EAP document is carried out at various times throughout the year, but specific pre- wet season training is undertaken in the months leading up to the wet season at each dam site. • During this time Sunwater staff have work instructions for site preparations, and during July to September carry out checks on stores, supplies of fuel, on the current EAP such as contact details for individuals and Dam information. • The EAP training that is carried out on site (with DDOs, LEC and IC present) include walkthroughs of new changes, scenario (role play) and Q & A to check the knowledge and competency of all those who attended. DSTDM information sessions are carried out once a year with the same walkthrough of new changes and Q & A but this is not specific to any one Dam. New employees to these various roles would also have a walkthrough of the EAP to understand after they start at Sunwater. • Sunwater is also working towards carrying out a full test once annually involving each local Council. Where there is more than one referable dam in a local area, the exercise could involve more than one dam or the location will be rotated. This full test would involve the SDCC and include the (non- live) testing of Emergency Alerts.

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2.5 Principles used in developing this EAP • The LDMG has principal carriage of managing any disaster situation within the community, with the support of the district and state groups. • Sunwater will aim to inform and support the LDMGs in the Burdekin, Charters Towers, and Whitsunday areas. • The LDMGs will be the principle voice on all communication to the community during a disaster situation where practical. • During a dam hazard that occurs with little or no warning, Sunwater will undertake the following actions to ensure the community is informed as soon as possible: - maintain an up to date list of immediately D/S residents of Burdekin Falls Dam. The downstream limit is shown in Appendix B, Figure B3 by the zone labelled Limit of downstream notification area. - provide timely advice to the LDMGs - notify the Immediately D/S residents via SMS - contact SDCC Watch Desk to send emergency notification to the Dam emergency polygon. • During a dam hazard the LDMGs in the Burdekin, Charters Towers, and Whitsunday areas will take the lead role in notifying all relevant persons. Sunwater will support the LDMGs by undertaking the following actions to ensure the community is informed as soon as possible: - maintain an up to date list of immediately D/S residents of Burdekin Falls Dam. The downstream limit is shown in Appendix B, Figure B3 by the zone labelled Limit of downstream notification area. - notify the Immediately D/S residents via SMS unless otherwise agreed with LDMGs. • Sunwater will independently inform and support the Townsville and Mackay DDMGs.

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2.5.1 Dam emergency organisation within Sunwater The Sunwater emergency management framework generally utilises the organisation’s hierarchy and in-house experts as illustrated in Figure 1 below. Figure 1: Sunwater emergency response organisation

Key aspects of the emergency management framework are described below: • Central to the framework is the role of Incident Coordinator (IC) for any dam hazard at a dam. The IC will maintain overall responsibility for managing the dam hazard. • The IC is responsible for the decision to activate the EAP. Should the IC be unavailable, the Local Event Coordinator (LEC) followed by the Dam Duty Officer (DDO) is responsible for the decision. If the IC loses all communications during a dam hazard, then as a fail-safe position, the LEC followed by the DDO will assume the duties and responsibility of the IC. However, loss of communications could result in some communication processes defined in this EAP not being carried out. • Sunwater’s in-house engineering and technical staff will provide technical advice to the IC, LEC and DDO on an as needs basis. The Flood Operations Decision Maker (FODM) and Dam Safety Technical Decision Maker (DSTDM) will provide flood and dam engineering advice respectively during a dam hazard. Such advice will be provided within an established framework of Standing Operating Procedures (SOPs), models, standards, and manuals. This is an advisory role only and does not diminish the decision responsibility of the IC, LEC or DDO.

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• If circumstances develop during a dam hazard that exceeds the established framework, it will be necessary to escalate to either the FODM or DSTDM. These roles are filled by Registered Professional Engineers of Queensland (RPEQ) and are suitably qualified professionals who can make engineering decisions and provide engineering decisions as defined in the Professional Engineers Act of Queensland. In some circumstances these decision-making roles may need to direct those in the direct chain of command. These decision-making roles are providing direct engineering supervision to the advisors through the established framework of SOPs, models, standards, and manuals or through direct supervision.

2.6 Community information • Sunwater with the assistance of the Burdekin, Charters Towers, and Whitsunday Councils will ensure community education around messaging and impacts of the EAP and its related events is undertaken and continually improved. • Sunwater currently provides information externally to customers, downstream residents and the community in a range of ways or channels in relation to Dam hazards and Emergency Situations. Individuals can access information through Facebook, Twitter, the Sunwater web page, Sunwater App and at several regional show/field days across regional Queensland where Sunwater may have stalls and information available. • Downstream residents are also provided information in text message/phone calls in the event of an activation of this EAP. • In the event of a Dam failure or when required Sunwater also have the use of the National Emergency Alert System to send a voice message or SMS. This service is provided by the State Disaster Coordination Centre and the process Sunwater follows is documented in Appendix A8. • A copy of all Sunwater approved EAPs are available to the public on the Business Queensland website - https://www.sunwater.com.au/community/preparing-for-weather-events/stay-informed/ These copies are redacted to protect people’s personal details.

2.7 Sunwater lessons learnt • Sunwater carries out Lessons Learnt workshops as part of its post event management. These Lessons learnt can result in changes to the EAP. These are captured and if applicable to this document are implemented at the earliest opportunity and are made available in the next EAP update to the regulator as part of Sunwater’s continual improvement of its EAPs. The lessons learnt actions if relevant are provided to stakeholders, such as the LDMGs, DDMGs, other dam owners and DNRME as appropriate. • In addition, Sunwater requests any post event learnings be communicated regarding operational effectiveness and areas for improvement.

2.8 Downstream notifications lists • Sunwater has compiled the notification lists through an iterative process. At least every 5 years Sunwater writes to all lot on plan landholders that are impacted in the downstream zones. In addition to individual letters, advertisements are placed yearly in local papers to capture any new residents in the areas. All year, applicable individuals can register to receive notifications for this EAP and are able to register either through the Sunwater website or by calling Sunwater Customer Enquires on 13 15 89.

2.9 Comprehensive Risk Assessments • Comprehensive Risk Assessments (CRA) are carried out on all Sunwater Dams. These are technical reports that are utilised to ascertain risks for each dam as the basis for emergency triggers. The CRA can be made available to Disaster Management Personnel whom require further assurance around the findings. To obtain a copy of a relevant CRA a request should be made in writing to Sunwater’s Executive General Manager Operations and Services, it should detail the reason for the request and indicate who will be interpreting the data, i.e. engineering capability, for any unqualified personnel.

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3. Dam details

3.1 General Dam Information Location: Burdekin Falls Dam is an 876m long, 57m high, mass-concrete dam, with associated Saddle Dams. The Main Dam and Saddle Dams are located on the Burdekin River, within the parish of Graham, County of Murray, in the Shire of Dalrymple.

Catchment: The catchment area is 114,650km2, which extends from the Seaview Range west of Ingham, south to the Drummond Range near Alpha, east to the coastal ranges of Mackay, and west beyond Charters Towers to the Lolworth, Montgomery, and Stopem Blockem Ranges.

Storage Capacity: The storage capacity at FSL is 1,860,000ML.

Construction: The dam was constructed to full height in 1987 and is used to supply irrigation water and water supply to the coalfields in Moranbah.

Specification: The table below lists general specifications of Burdekin Falls Dam. Table 2: Burdekin Falls Dam specifications Description Specification Main Dam type Mass-concrete gravity Full Supply Level (FSL) EL 154.00m Storage capacity at FSL 1,860,000ML Storage area at FSL 22,000ha Historical recorded flood—Feb 1991 Max EL 160.85m (first filling conditions will apply above this level) Main Dam crest level EL 172.2m (left abutment) EL 169.2m (right abutment) Maximum height of Main Dam above foundation 57m (Main Dam) Length across crest 142m (left abutment) 230m (right abutment) Spillway type Uncontrolled concrete ogee crest Spillway crest level EL 154m Spillway capacity at DCF 6,013,500ML/d (69,600m3) Spillway crest length 504m Outlet control 3/3m x 2m high-pressure radial gates Left bank Saddle Dam Saddle Dam type Earth and rock-fill Saddle Dam crest level EL 171m Length across crest 1,150m Maximum height of Saddle Dam above foundation 36m Description Specification

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Description Specification Mt Graham North Saddle Dam Saddle Dam type Earth and rock-fill Saddle Dam crest level EL 171m Length across crest 1,400m Mt Graham South Saddle Dam Saddle Dam type Earth and rock-fill Saddle Dam crest level EL 171m Length across crest 2,100m Maximum height of Saddle Dam above foundation 13m Northern abutment Saddle Dam Saddle Dam type Earth and rock-fill Saddle Dam crest level EL 171m Length across crest 90m Maximum height of Saddle Dam above foundation 5m

All levels are to Australian Height Datum, AHD. Conversion for Dam is AHD = ((State Datum in feet x 0.3048)-0.293) m.

3.2 Population at risk The following is derived from the Burdekin Falls Dam Failure Impact Assessment conducted by Sunwater in June 2017, HB# 2171383 (Sunwater internal link): • The estimated maximum incremental failure PAR for Burdekin Falls Dam is 4,457 for the 1:100 AEP flood failure of the main dam wall. Burdekin Falls Dam has a Category 2 Failure Impact Rating.

3.3 Spillway adequacy A Comprehensive Risk Assessment (CRA) of Burdekin Falls Dam was finalised in June 2012. The assessment concluded that the current individual and societal risks are unacceptable and recommended that a full upgrade for a standard’s based approach to ANCOLD fallback Acceptable Flood Capacity (AFC) be undertaken to reduce the inherent level of risk. For an ‘Extreme’ consequence dam the AFC is the Probable Maximum Flood (PMF). Currently the dam can pass 61% of the AFC. The proposed staged dam safety upgrade would involve: • Stage 1: Improve under-drain system and anchoring of the downstream end of the spillway and rock foundations. • Stage 2: Upgrade to Probable Maximum Precipitation Design Flood (PMPDF)—raise all Saddle Dams 1.5m, install post-tensioned anchors in the Main Dam spillway. The upgrade works are proposed to be completed during the period 2018–2030. 3.4 General arrangement The general arrangement drawings are in Appendix B.

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3.5 Emergency inspections and monitoring The Burdekin Falls Dam has been designed to conform to modern design standards, so that its failure is highly unlikely. To maintain the dam in a safe condition and detect any dam hazard, as soon as it begins to develop, or becomes apparent, the following is applicable to Burdekin Falls Dam.

3.5.1 Inspections • Routine Visual Inspection: Conducted as per the ANCOLD Guidelines or as directed by the DSTDM • Detailed Inspection: Conducted annually • Comprehensive Inspection: Conducted 5-yearly.

3.5.2 Instrumentation and monitoring To confirm the structural behaviour and safety of the embankment, the following instrumentation was installed, and is monitored, at Burdekin Falls Dam (Main and Saddle Dams).

Main Dam • Water level measurement - 5 observable bores located downstream on the right abutment - 12 uplift pressure monitoring wells located on both abutments at the downstream toe of the dam wall - 34 foundation relief wells (there are 190 foundation relief wells—34 have been prepared for carrying out measurements, 28 located in spillway monos, 3 in right abutment monos, and 3 in left abutment monos). • Seepage measurement - 3 v-notch weirs located in the lower gallery. • Settlement/movement measurement - 28 surface settlement points.

Left bank Saddle Dam • Pore pressure measurement - 11 hydraulic piezometers - 2 electric piezometers (non-functional). • Water level measurement - 2 observable bores—1 located outside instrumentation terminal building. • Seepage measurement - 1 v-notch weir located at Chinamen Creek, downstream of the embankment, near the instrumentation terminal building. • Settlement/movement measurement - 6 surface movement points and 6 pickets on the left abutment embankment crest. NOTE: 4 total pressure cells on the left bank Saddle Dam have been decommissioned. Layout The instrumentation layout drawings are in Appendix B.

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4. Roles and responsibilities

Roles and responsibilities Position holder

Owner • Liaise with the Board and Minister CEO • Activate Sunwater Strategic Response and Business Continuity Plans, if required EGMO • Ensure necessary resources are available to manage any event EGMWR&DS

• Record communications, notifications and observations as required Owner’s Head Office Representative • Authorise the issuing of EAPs, SOPs and O&M Manuals and Amendments SCED • Facilitate Dam Safety Training Courses for Service Managers, Operations Supervisor, PDSE Dam Operators and other staff as appropriate and ensure that all staff required to CED undertake Dam Safety work are trained and accredited MAP • Ensure that risks identified in CRAs or other technical reports undertaken in relation to Dam Safety are Included in the EAP • Ensure visual inspections and instrumentation monitoring frequencies conform to ANCOLD Guidelines • Ensure all Dam Safety work orders, work instructions and lesson learned outcomes are fully implemented. • Ensure requirements of the Dam Condition Schedule are met • Ensure the work instructions are correct and the Log Books, SOPs, Data Books, and EAPs are reviewed annually as per the Condition Schedule • Undertake and prepare the 5 yearly Comprehensive Inspection Reports with suitably qualified personnel within the time specified in the Condition Schedule and that work orders are created for recommendations and work is undertaken as required • Undertake Annual Inspections and prepare reports within the time frames specified in the Condition Schedule and that work orders are created for recommendations and work is undertaken as required • Review the Dam Safety Instrumentation Database and evaluate data to verify the structural integrity of the dams on a regular basis and maintain a spread sheet for verification for audit and quality control • Record communications, notifications and observations as required Owner’s Regional Representative (ORR) • Liaise with the Storage Supervisor/Operator Maintainer OCO • Arrange dam specific training and accreditation for relevant staff OMGR • Ensure competent, trained and accredited personnel operate the storages OS

• Undertake the role of LEC as required • Record communications, notifications and observations as required • Ensure all work orders, work instructions and lesson learned outcomes are fully implemented. Technical Advisor • Analyse the situation and provide expert technical advice ME • Discuss issue with peers and other technical experts and make sound decisions to mitigate the risk • Determine response to incidents and emerging issues • Record communications, notifications and observations as required

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Roles and responsibilities Position holder Dam Safety Technical Decision Maker (DSTDM) • Analyse the situation and provide expert technical advice in relation to Dam Safety Various personnel as per DSTDM roster • Discuss Dam Hazard with peers and other technical experts and make sound decisions to mitigate the risk • Determine response to incidents and emerging issues • Issue warning on dam failure and advise on protective measures • Ensure the EAP is implemented appropriately and carry out the DSTDM role as required • Maintain current RPEQ accreditation • Liaise with Regulator as required • Record communications, notifications and observations as required Flood Operations Decision Maker (FODM) • Provide hydrological advice in relation to predicted and actual dam outflows Various personnel as per FODM roster • Ensure model outputs are checked and approved • Ensure the EAP is implemented appropriately and carry out the FODM role as required • Record communications, notifications and observations as required Operations Centre Duty Officer (OCDO) • Decide if a flood is imminent and record modes of operation Various personnel as per OC roster • Extract data relative to the event from available sources • Utilise this data in predictive flood models and determine results from these models for approval by FODM • Liaise with the FODM or IC to update current flood situation and routing data • Record communications, notifications and observations as required Sunwater Media Team (SMT) • Analyse sensitive issues, discuss with the Owner and issue media releases Various personnel as per Media Team roster • Handle public and customer comments (including social media) and advise the Owner if necessary • Liaise with the IC and update SDMG of flood events • Record communications, notifications and observations as required Incident Coordinator (IC) • Notify council of intent to use the Emergency Alert Various personnel as per IC roster • Activate the EAP

• Ensure the EAP is implemented appropriately and carry out the IC role as required • Arrange Situation Reports and determine frequency, as required • Record communications, notifications and observations as required Local Event Coordinator (LEC) • Liaise with the Local Disaster Coordinator or proxy Various personnel as per LEC roster • Activate the EAP, when necessary • Ensure the EAP is implemented appropriately and carry out the LEC role as required • Record communications, notifications and observations as required

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Roles and responsibilities Position holder Dam Duty Officer (DDO) • Complete accreditation to operate and maintain relevant storage SOM • Ensure the EAP is implemented appropriately and carry out the DDO role as required SS • Take direction from the DSTDM and IC as requested OM • Arrange immediate site inspection and make informed assessment of the situation • Escalate any issue not covered in the EAP or where actions are not clear • Record communications, notifications and observations as required Councils (Burdekin Shire, Charters Towers Regional & Whitsunday Regional) Council has legislated local government functions, as per Section 80 of the Disaster Management Act (2003). These include: • Ensure it has a disaster response capability • Approve its local disaster management plan • Ensure information about an event or a disaster in its area is promptly given to the district disaster coordinator for the disaster district in which area it is situated • Perform other functions given to the local government under the Act And as per Section 352HB of the Water Legislation (Dam Safety) Amendment Act (2017): • Must assess (in consultation with its LDMG) the EAP for consistency with the Local Disaster Management Plan Disaster Management Groups/Personnel - (In addition to requirements outlined in the Disaster Management Act 2003). LDMG LDMGs DDMG • Assist Sunwater and the Burdekin Shire Council, Charters Towers Regional Council, and QFES Whitsunday Regional Council to ensure community education around messaging and impacts of EAP related events is undertaken and continually improves • Work with Burdekin Shire Council, Charters Towers Regional Council, Whitsunday Regional Council and Sunwater to ensure the EAP is regularly exercised • Identify and coordinate the use of manpower and resources that may be required for an EAP event • Identify and provide advice to DDMG about support services required by the LDMG to manage an EAP event • Provide reports and make recommendations to the relevant DDMG about matters relating to EAP events and any support required QFES • Work with dam owner and LDMGs to ensure Emergency Alerts polygons are prepared, stored and tested DDMG • DDMG may review plan with consistency with the District Disaster Management Plan

Space Dam Safety Regulator (DSR) • Liaise with relevant Minister on necessary actions DDS • Approve this document as required under legislation • Liaise with chief executive as required in administering (regulating) the Water Supply (Safety and Reliability) Act 2008

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5. Dam hazard—flood operations

5.1 Overview The emergency action described in this section (downstream release hazard—flood operations) relates to: • A dam hazard where natural catchment inflows fill Burdekin Falls Dam to FSL 154.00m and the rate of inflow exceeds the capacity of the outlet works. The spillway will then discharge water downstream into the Burdekin River. These flood flows can create a downstream release hazard. Inflows will also cause the storage to temporarily rise to above the FSL of the storage. Note: - The greater the rate of inflow, the higher the storage will rise. - The higher the storage level rises, the greater the loads on the dam structure. - Although unlikely, the greater the loading, the higher the likelihood of a dam failure. - Typically, the level of surveillance is increased during flood operations (refer tables in this section). - Spillway discharge from the dam where there have been no indications that a dam failure may be initiating or in progress. The area likely to be affected by this emergency event is described as: • For small flows, the water will be contained within the river and will not create a downstream release hazard. • As the rate of discharge increases there will be an impact on low-level road crossings of the Burdekin River and other infrastructure in the river such as pump sites. • When the storage height exceeds minor flood level (3.0m over the spillway) EL 157.00m, low-lying areas next to water courses are inundated. Minor roads may be closed and low-level bridges submerged. In urban areas, inundation may affect some backyards and buildings below the floor level as well as bicycle and pedestrian paths. In rural areas removal of stock and equipment may be required. • When the storage height exceeds major flood level (8.0m over the spillway) EL 162.00m, in addition to the above, extensive rural areas and/or urban areas are inundated. Many buildings may be affected above the floor level. Properties and towns are likely to be isolated and major rail and traffic routes closed. Evacuation of flood affected areas may be required. Utility services may be impacted. Detailed information on downstream flood impacts is presented in Appendix B.

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Table 3: Flood classification triggers Flood Depth over Storage classification spillway elevation level (m) (m AHD)

Major 8.00 162.00

Moderate 5.50 159.50

Minor 3.00 157.00

Source: Bureau of Meteorology

The following table shows historical floods experienced at Burdekin Falls Dam. Table 4: Historical floods experienced at Burdekin Falls Dam Flood Peak height Peak height Peak Gauge Height at Date rank EL (AHD) (m over crest) Inkerman Bridge (m) 1 February 1991 160.85m 6.85m 11.50 2 February 2009 160.73m 6.73m 11.55 3 February 2019 160.46m 6.46m 4 February 2009 159.22m 5.22m 10.80 5 March 2012 159.10m 5.10m 10.96 6 February 2008 159.05m 5.05m 11.80 7 January 1991 158.93m 4.93m 9.58 8 January 1998 158.87m 4.87m 9.20 9 February 2011 158.37m 4.37m 8.60 10 February 1991 157.95m 3.95m 8.81

Note: Peak flood heights at the dam and Inkerman Bridge are not directly related due to many factors including but not limited to; initial dam level prior to rainfall, temporal and spatial rainfall variability, and inflows downstream of the dam (e.g. Bowen and Bogie Rivers).

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5.2 Emergency actions In the table below, each level of activation includes both its own actions and the actions of any lower level, unless those lower level actions are superseded. 5.2.1 Activation triggers Table 5: Flood emergency activation trigger summary

• EL 153.90m and rising Alert (0.1m below FSL)

Lean Forward • Storage above FSL 154.00m

Stand Up—greater than • Storage above EL 157.00m minor flood level (Minor flood classification level) Stand Up—greater than • Storage above EL 160.85m flood of record (Flood of record February 1991) Stand Up—greater than • Storage above EL 162.00m major flood level (Major flood classification level) • Storage above EL 168.70m Stand Up—4 (Based on factor of safety = 1)

Stand Down • Storage level EL 154.30m and falling

While this EAP is not activated until Burdekin Falls Dam reaches a level of 153.90m, Sunwater and Burdekin Shire Council, Charters Towers Regional Council, and Whitsunday Regional Council will work cooperatively and will endeavour to share intelligence of any rainfall event as and when either organisation becomes aware of a situation that could result in the activation of the EAP. 5.2.2 Assessment of circumstances that indicates an increase in the likelihood of flood operations The Operations Centre Duty Officer (OCDO) will assess the weather and flood warnings daily in accordance with the Operations Centre (OC) SOP. The OCDO will escalate to the Incident Coordinator (IC) any warnings that have the potential to generate an inflow event in the catchment in the following 24 hours. The on-call IC will escalate to the FODM any local intelligence on catchment conditions that could increase the probability of inflows to the dam. The OCDO will determine whether it is reasonably likely that the dam could reach EL 153.90m within the subsequent 24 hours. If so assessed, the FODM will instruct the IC to trigger the Alert status for flood operations. 5.2.3 Emergency actions Table 6 to Table 11 specify emergency actions for the following roles: • Dam Duty Officer (DDO) • Local Event Coordinator (LEC) • Incident Coordinator (IC) • Dam Safety Technical Decision Maker (DSTDM) • Flood Operations Centre Duty Officer (FODM)

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Table 6: Flood operations—DDO emergency action

Activation Stand Up—greater than Stand Up—greater than Stand Up—greater than Alert Lean Forward Stand Up—4 Stand Down level minor flood level flood of record major flood level Activation • EL 153.90m and rising • Storage above • Storage above • Storage above • Storage above • Storage above • Storage level trigger (0.1m below FSL) FSL 154.00m EL 157.00m EL 160.85m EL 162.00m EL 168.70m EL 154.30m and falling Actions • Inspect the dam daily (or • As per previous activation • As per previous activation • As per previous activation • As per previous activation • As per previous activation • Return to routine as instructed by the level, AND level, AND level, AND level, AND level, AND surveillance activities and DSTDM) and • Inspect the dam daily (or • Inspect the dam twice • Undertake uplift pressure • Undertake uplift pressure • Record any crest frequencies—inspect the photograph/video the as instructed by the daily (or as instructed by readings, if safe to do so readings, if safe to do so movement (S6) or joint dam for any damage and dam once whilst in Alert DSTDM) and the DSTDM) and • Daily inspections to movement (S16) photograph any damage stage and record using photograph/video and photograph/video and include the northern • Undertake visual identified the approved forms in record using the record using the Abutment Saddle from surveillance across • Forward information for Appendix D and send to approved forms in approved forms in the time water level spillway from left EER to IC email IC & DSTDM Appendix D and send to Appendix D and send to reaches the U/S toe at EL abutment, looking for • Update Dam Log Book • Record the river levels at IC & DSTDM. Attention IC & DSTDM 166.00m unusual flow in the as per SOP 12 Sellheim 120002C, Mt will be given to: • Daily inspections to spillway. Report to • Return to routine Fullstop 120110A, Blue - visual inspection of flow include Saddle Dams DSTDM and IC activities range 120107B, and patterns over spillway from the time water level immediately • Remove road closures Scartwater Station (on and dissipator for reaches the U/S toe at: when storage level drops Sutton River) at 24-hour evidence of scouring - EL 158.00m Mt Graham NOTE: No additional below FSL 154.00m intervals - inspect embankment for Sth uplift pressure readings • Undertake site leaks, deformation, and - EL 160.00m Mt Graham required as completed in preparations including but erosion Nth previous activation level, not limited to: - check the seepage in the • Read instrumentation unless directed - check fuel and operation galleries and record the daily (or as instructed by of backup generator flow of v-notch weirs the DSTDM) for both the - check operations of sump • Report any unusual Main Dam and left Bank pump readings or observations Saddle Dam, as detailed - check communication to the DSTDM & IC as in Section 3.5.2 systems (including soon as practical backup, satellite/digital • Undertake road closures phones, fax, and internet) when storage level • Notify the SO reaches EL 154.0m

DDO ALERT ACTIONS CONTINUED NEXT PAGE

ALL ACTION MUST BE TAKEN WHEN IT IS SAFE TO DO SO 13 15 89 Sunwater Customer e.g., taking photographs/video, dam inspections, instrument readings Burdekin_Falls_Dam_EAP_I8_2.docx ! ALL PHOTOS MUST BE DATE STAMPED Support 24-hour contact line Page 21

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Table 6 (Continued): Flood Operations—DDO emergency action

Internal 1. IC • As per previous activation • As per previous activation • As per previous activation • As per previous activation • As per previous activation • As per previous activation notifications level level level level level, AND level 2. SO • DSTDM External • As required • As required • As required • As required • As required • As required • As per previous activation notifications level

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Table 7: Flood operations—LEC emergency action Activation Stand Up—greater than Stand Up—greater than Stand Up—greater than Alert Lean Forward Stand Up—4 Stand Down level minor flood level flood of record major flood level Activation • EL 153.90m and rising • Storage above • Storage above • Storage above • Storage above • Storage above • Storage level trigger (0.1m below FSL) FSL 154.00 m EL 157.00m EL 160.85m EL 162.00m EL 168.70m EL 154.30m and falling

Actions • Liaise with DDO, IC and • As per previous • As per previous • As per previous • As per previous • As per previous • Forward information for LDMGs re: situation activation level activation level activation level activation level activation level EER to IC email • Develop/implement staff • Return to routine roster activities • Record all communication

Internal 1. DDO • As per previous • As per previous • As per previous • As per previous • As per previous • As per previous notifications activation level activation level activation level activation level activation level activation level 3. IC External 4. LDMG 1 • As per previous • As per previous • As per previous • As per previous • As per previous • As per previous notifications activation level activation level activation level activation level activation level activation level 5. LDMG 2 6. LDMG 3

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Table 8: Flood operations—IC emergency action Activation Stand Up—greater than Stand Up—greater than Stand Up—greater than Alert Lean Forward Stand Up—4 Stand Down level minor flood level flood of record major flood level Activation • EL 153.90m and rising • Storage above • Storage above • Storage above • Storage above • Storage above • Storage level trigger (0.1m below FSL) FSL 154.00 m EL 157.00m EL 160.85m EL 162.00m EL 168.70m EL 154.30m and falling Actions • Liaise with Sunwater • As per previous • As per previous • As per previous • As per previous • As per previous • Deactivate EAP Customer Support to activation level, AND activation level activation level activation level activation level, AND • Compile EER and deliver send SMS to D/S • Prepare Daily Situation • Ensure DDO undertaking to DSR if required residents Report, unless otherwise and reporting additional • Complete Situation • Liaise with the DDO, directed surveillance Report (final) LEC, DSTDM and the • Ensure all abnormal • Return to routine FODM as required observations or damage activities • Obtain catchment have been reported to conditions from the DDO DSTDM and liaise with FODM and obtain PFRM • Check the Clare Weir flood gates are in Automatic • Issue Sunwater incident alert • Record all communication NOTE: IC to carry out LEC actions unless LDMG1 is Stood Up

Internal 4. DDO • As per previous • As per previous • As per previous • As per previous • As per previous • Inform previous notifications activation level activation level activation level activation level activation level notification of 5. DSTDM deactivation as required 6. FODM 7. LEC 8. ORR 9. SMT External 1. D/S Residents • As per previous • As per previous • As per previous • As per previous • As per previous • As per previous notifications activation level activation level activation level activation level activation level, AND activation level 2. DDMG 1 • SDCC Watch Desk 3. DDMG 2

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Table 9: Flood operations—LEC and IC communication plan Activation Trigger for communications Group to contact Method Message text level • When EL 153.90m and rising • LDMG 1 Phone Describe current situation with dam—What is the event? (preparedness) • LDMG 2 What is the status? • LDMG 3 Advise of current storage level • DDMG 1 • DDMG 2 Alert D/S Residents SMS SUNWATER EMERGENCY NOTIFICATION (Phone for DAM: BURDEKIN FALLS those without EVENT: FLOOD mobiles) STATUS: NEAR FULL STORAGE SPILLWAY DISCHARGE LIKELY Current Storage Level: EL XXXX.XXm (X.Xm below spillway) and rising/steady/falling ACTION: PREPARE FOR FLOOD EMERGENCY ACTIVATION • Storage above FSL 154.00m • LDMG 1 Phone Describe current situation with dam—What is the event? • LDMG 2 What is the status? • LDMG 3 Advise of current storage level and whether any flood releases are due to commence • DDMG 1 Discuss any potential road/bridge closures • DDMG 2 Lean Forward • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for SUNWATER EMERGENCY NOTIFICATION those without DAM: BURDEKIN FALLS mobiles) EVENT: FLOOD STATUS: STORAGE SPILLING ACTION: STAY ALERT FOR FURTHER ADVICE • Storage above EL 157.00m • LDMG 1 Phone Describe current situation with dam—What is the event? • LDMG 2 What is the status? (storage is greater than minor flood level, as set by BOM) • LDMG 3 Advise of current storage level • DDMG 1 Advise of any forecasts you are aware of Stand Up— • DDMG 2 greater than minor flood • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: level (Phone for SUNWATER EMERGENCY NOTIFICATION those without DAM: BURDEKIN FALLS mobiles) EVENT: FLOOD STATUS: MINOR FLOOD ACTION: STAY ALERT FOR FURTHER ADVICE

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Table 9 (Continued): Flood Operations—LEC and IC communication plan Activation Trigger for communications Group to contact Method Message text level • Storage above EL 160.85m • LDMG 1 Phone Describe current situation with dam—What is the event? (Flood of record—Feb 1991) • LDMG 2 What is the status? (storage is greater than flood of record) • LDMG 3 Advise of current storage level • DDMG 1 Advise of any forecasts you are aware of Stand Up— greater than • DDMG 2 flood of • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: record (Phone for SUNWATER EMERGENCY NOTIFICATION those without DAM: BURDEKIN FALLS mobiles) EVENT: FLOOD STATUS: FLOOD OF RECORD ACTION: CONSIDER YOUR NEED TO SELF EVACUATE • Storage above EL 162.00m • LDMG 1 Phone Describe current situation with dam—What is the event? • LDMG 2 What is the status? (storage is greater than major flood level, as set by BOM) • LDMG 3 Advise of current storage level • DDMG 1 Advise of any forecasts you are aware of Stand Up— greater than • DDMG 2 major flood • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: level (Phone for SUNWATER EMERGENCY NOTIFICATION those without DAM: BURDEKIN FALLS mobiles) EVENT: FLOOD STATUS: MAJOR FLOODING ACTION: CONSIDER YOUR NEED TO SELF EVACUATE

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FSL 154.00m Burdekin Falls–2020/21–i8.2

Table 9 (Continued): Flood Operations—LEC and IC communication plan Activation Trigger for communications Group to contact Method Message text level • Storage above EL 168.70m • LDMG 1 Phone Describe current situation with dam—What is the event? • LDMG 2 What is the status? (critical level—monoliths are now unstable and/or Saddle Dams also likely to flood) • LDMG 3 Advise of current storage level • DDMG 1 Advise of any forecasts you are aware of • DDMG 2 • SDCC Watch Phone & Complete Emergency Alert Request Form as per instructions (copies in Appendix A8 and Appendix D) and email to SDCC Stand Up—4 Desk Email Watch Desk to send. SMS text as follows: BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION AND LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION AND those without LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO mobiles) • Storage level EL 154.3m • LDMG 1 Phone Describe current situation with dam—What is the event? What is the status? • LDMG 2 Advise of current storage level • LDMG 3 Advise EAP has been deactivated • DDMG 1 • DDMG 2 Stand Down • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for SUNWATER EMERGENCY NOTIFICATION those without DAM: BURDEKIN FALLS mobiles) EVENT: FLOOD STATUS: DAM HAZARD STOOD DOWN ACTION: NONE

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Table 10: Flood operations—DSTDM emergency action

Internal 1. DDO • As per previous • As per previous • As per previous • As per previous • As per previous • As per previous notifications activation level activation level activation level activation level activation level, AND activation level 2. IC • CEO—if time permits External 3. DSR • As per previous • As per previous • As per previous • As per previous • As per previous • As per previous notifications activation level activation level activation level activation level activation level activation level

FSL 154.00m Burdekin Falls–2020/21–i8.2

Table 11: Flood operations—FODM emergency action

Internal 1. IC • As per previous • As per previous • As per previous • As per previous • As per previous • As per previous notifications activation level activation level activation level activation level activation level 2. DDO activation level, AND • DSTDM External • As required • As required • As required • As required • As required • As required • As per previous notifications activation level

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6. Dam hazard—overturning or sliding of monoliths

6.1 Overview The emergency action described in this section relates to a potential emergency event due to overturning or sliding of one or more of the concrete monoliths. If one or more monoliths become unstable, a dam failure may result. If movement is detected early, remedial actions may be possible depending on the nature of the damage. The stability of the dam in its current configuration has been fully evaluated. Overturning or sliding of a monolith may be possible for the levels outlined in the Emergency Action Tables. The uplift measurements to date have shown that most of the spillway monoliths have very favourable uplift pressures. The only monolith that has measured uplift pressure approaching the design pressure is Monolith S12. Other monoliths that have measured uplift pressures higher than the average are monoliths S10, S13, and S15 (HB # 1226285). It is possible that an unstable situation could eventuate that would lead to a dam failure. The most likely cause of a change that could lead to an unstable situation would be scouring at or near the toe of a monolith during a flood. The flood outlines in Appendix B are there to provide indicative outlines of the maximum potentially affected area of a dam hazard caused by overturning or sliding of monoliths. The use of these flood outlines is prescribed below: • Use the Sunny Day Failure (SDF) outline when a dam failure is in progress or likely due to overturning or sliding of monoliths and no concurrent flooding or downstream releases are occurring or expected to occur, or • Use the Probable Maximum Flood (PMF) outline when a dam failure is in progress or likely due to overturning or sliding of monoliths and concurrent flooding or downstream releases are occurring or expected to occur. Notes: Definitions for Concurrent Flooding and Downstream Releases are provided in Section 1.3 If the DSTDM forms the view that significant scouring is occurring, then the need for evacuations should be considered by disaster management authorities. 6.1.1 Assessment of circumstances that indicates an increase in the likelihood of overturning An earthquake is a circumstance that could indicate an increased likelihood of overturning. Inspections following an earthquake would identify if any movement had taken place which is the alert status for overturning. An increase in seepage is a circumstance that could indicate an increased likelihood of overturning. This circumstance is the alert status for overturning. An increase in lake level beyond 160.85m is a circumstance that could indicate an increase likelihood of overturning. This circumstance is the trigger for the lean forward status for overturning.

6.2 Emergency action roles Table 12 to Table 16 specify emergency actions for the following roles: • Dam Duty Officer (DDO) • Local Event Coordinator (LEC) • Incident Coordinator (IC) • Dam Safety Technical Decision Maker (DSTDM)

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Figure 2: Overturning or sliding of monoliths flowchart

LEAN FORWARD ALERT STAND UP Storage level of flood of Obvious displacement of Indications of movement record or increase in monolith or scouring at noted. movement or seepage. toe.

DSTDM: DSTDM: Assess surveillance report. Assess information and risk.

DSTDM: Yes: Go to Stand Up Has possible failure path been identified?

DSTDM: DSTDM: Arrange inspection as soon as Determine if: DSTDM: possible. No • Remedial repairs are practical Is failure likely or in • Risk can be reduced by

Risk reduced: Noreduced:Risk progress? lowering storage. Supervise remedial works.

Yes

DSTDM: LEC: Monitor and assess if risk Liaise with LDMG. has been reduced. LEC:

Liaise with LDMG re: evacuations. Risk reduced: No

Risk reduced: Yes

Risk reduced: Yes DSTDM: STAND DOWN Monitor and assess if risk has been reduced.

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Table 12: Overturning or sliding of monoliths—DDO emergency action

Activation level Alert Lean Forward Stand Up—1 Stand Up—2 Stand Down Activation • Indications of movement of • Storage level at flood of record • Obvious displacement of one or • Failure in progress or likely due to • Risk assessment has determined trigger monoliths noted such as cracking, EL 160.85m, OR more monoliths, OR sliding or over turning, OR that sliding or over turning risk has increased seepage, or opening of • Increase in movement, pressures, or • Evidence of scouring at or near toe • Storage Level at stability factor of reduced joints seepage of dam, OR safety 1.0, EL168.70m • Storage Level at stability factor of safety 1.3, EL 167.49m Actions • Measure, record and report • As per previous activation level, • As per previous activation level, • As per previous activation level, • Forward information for EER to IC foundation drain pressures to AND AND AND email DSTDM. • Maintain photographic record • Lower the storage if directed • Vacate the immediate vicinity of the • Update Dam Log Book as per SOP • Monitor dam every 6 hours (or as • Close any affected roads if not Dam 12 otherwise instructed by the DSTDM) already closed by others • Return to routine activities until a decreasing trend is • Maintain surveillance of area observable or as directed by the IC immediately downstream of dam (if • Photograph/video the piping from a safe to do so) and move on any safe point and record using the members of the public approved forms in Appendix D and send to IC & DSTDM • Notify SO • Update Dam Log Book as per SOP 12 • Record all communication

Internal 1. DSTDM • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications 2. SO 3. IC External • As required • As required • As required • As required • As per previous activation level notifications

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Table 13: Overturning or sliding of monoliths—LEC emergency action

Activation level Alert Lean Forward Stand Up—1 Stand Up—2 Stand Down Activation • Indications of movement of • Storage level at flood of record • Obvious displacement of one or • Failure in progress or likely due to • Risk assessment has determined trigger monoliths noted such as cracking, EL 160.85m, OR more monoliths, OR sliding or over turning, OR that sliding or over turning risk has increased seepage, or opening of • Increase in movement, pressures, or • Evidence of scouring at or near toe • Storage Level at stability factor of reduced joints seepage of dam, OR safety 1.0, EL168.70m • Storage Level at stability factor of safety 1.3, EL 167.49m Actions • Liaise with IC and DDO re: situation • As per previous activation level, • As per previous activation level, • As per previous activation level, • Forward information for EER to IC • Record all communication AND AND AND email • Liaise with LDMGs re: situation • Liaise with relevant Council(s) • Liaise with LDMGs re: potential for • Return to routine activities regarding potential road/bridge evacuations closures Internal 1. IC • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications 2. DDO External 3. LDMG 1 • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications 7. LDMG 2 8. LDMG 3

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Table 14: Overturning or sliding of monoliths—IC emergency action

Activation level Alert Lean Forward Stand Up—1 Stand Up—2 Stand Down Activation • Indications of movement of • Storage level at flood of record • Obvious displacement of one or • Failure in progress or likely due to • Risk assessment has determined trigger monoliths noted such as cracking, EL 160.85m, OR more monoliths, OR sliding or over turning, OR that sliding or over turning risk has increased seepage, or opening of • Increase in movement, pressures, or • Evidence of scouring at or near toe • Storage Level at stability factor of reduced joints seepage of dam, OR safety 1.0, EL168.70m • Storage Level at stability factor of safety 1.3, EL 167.49m Actions • Liaise with DDO, LEC and DSTDM • As per previous activation level, • As per previous activation level, • As per previous activation level, • Deactivate EAP re: situation AND AND AND • Compile EER and deliver to DSR if • Complete Situation Report, unless • Place machinery operators on • Mobilise resources to undertake • Liaise with DDO, DSTDM, and LEC required otherwise directed standby if directed by DSTDM remedial works if directed by re: potential for evacuations • Complete Situation Report (final) • Record all communication • SW Incident and Near Miss Alert DSTDM • Return to routine activities

NOTE: IC to carry out LEC actions unless LDMG1 is Stood Up

Internal 1. DDO • As per previous activation level • As per previous activation level • As per previous activation level • Inform previous notifications of notifications deactivation as required 2. DSTDM 3. LEC 4. ORR 5. SMT External • As required 1. DDMG 1 1. D/S Residents • As per previous activation level • As per previous activation level notifications 2. DDMG 2 2. SDCC Watch Desk

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Table 15: Overturning or sliding of monoliths—LEC and IC communication plan Activation Trigger for communications Group to contact Method Message text level • Indications of movement of • LDMG 1 Phone Describe current situation with dam—What is the event? (unconfirmed instability of dam) monoliths noted such as • LDMG 2 What is the status? (under investigation) Alert cracking, increased seepage, or • LDMG 3 Advise of current storage level opening of joints Advise of any forecasts you are aware of

• Storage level at flood of record, • LDMG 1 Phone Describe current situation with dam—What is the event? (unconfirmed instability of dam) EL 160.85m, OR • LDMG 2 What is the status? (under investigation) Lean Forward • Increase in movement, • LDMG 3 Advise of current storage level pressures, or seepage • DDMG 1 Advise of any forecasts you are aware of • DDMG 2 • Obvious displacement of one or • LDMG 1 Phone Describe current situation with Dam—What is the event? (confirmed instability of dam) more monoliths, OR • LDMG 2 What is the status? (prepare for possible evacuations) • Evidence of scouring at or near • LDMG 3 Advise of current storage level toe of dam, OR • DDMG 1 Advise of any forecasts you are aware of • Storage Level at stability factor • DDMG 2 Discuss any potential road/ bridge closures of safety 1.3, EL 167.49m • SDCC Watch Phone & Email Complete Emergency Alert Request Form as per instructions (copies in Appendix A8 and Appendix D) and email to Stand Up—1 desk SDCC Watch Desk to send.

• D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for Sunwater Emergency notification those without DAM: Burdekin Falls mobiles) EVENT: Dam safety risk—overturning/sliding STATUS: Confirmed—instability of dam ACTION: Possible issue at dam listen for further advice

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Table 15 (Continued): Overturning or sliding of monoliths—LEC and IC communication plan

Activation Trigger for communications Group to contact Method Message text level • Failure in progress or likely due • LDMG 1 Phone Describe current situation with dam—What is the event? (possible dam failure) to sliding or over turning, OR • LDMG 2 What is the status? (prepare coordinated evacuation) • Storage Level at stability factor • LDMG 3 Advise of current storage level of safety 1.0, EL168.70m • DDMG 1 Advise of any forecasts you are aware of • DDMG 2 • SDCC Watch Phone & Email Complete Emergency Alert Request Form as per instructions (blank copy in Appendix D) and email to SDCC Watch Desk desk to send.

• D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for Sunwater Emergency notification—urgent those without DAM: Burdekin Falls mobiles) EVENT: Dam safety risk—overturning/sliding STATUS: Dam failure likely/in progress ACTION: Possible evacuation follow instructions of emergency services Stand Up—2 • Dam failure in progress • LDMG 1 Phone Describe current situation with dam—What is the event? (dam failure) • LDMG 2 What is the status? (dam failure in progress move to higher ground—LDMG coordinate evacuation of affected downstream • LDMG 3 residents) • DDMG 1 Advise of current storage level • DDMG 2 Advise of any forecasts you are aware of • SDCC Watch Phone & Email Complete Emergency Alert Request Form as per instructions (copies in Appendix A8 and Appendix D) and email to desk SDCC Watch Desk to send. SMS text as follows: BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION AND LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO

• D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION those without AND LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO mobiles)

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Table 15 (Continued): Overturning or sliding of monoliths—LEC and IC communication plan

Activation Trigger for communications Group to contact Method Message text level • Risk assessment has • LDMG 1 Phone Describe current situation with dam—What is the event? determined that risk has • LDMG 2 What is the status? reduced • LDMG 3 Advise of current storage level • DDMG 1 Advise EAP has been deactivated • DDMG 2 Stand Down • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for Sunwater Emergency notification those without DAM: Burdekin Falls mobiles) EVENT: Dam safety risk—overturning/sliding STATUS: Dam hazard stood down ACTION: None

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Table 16: Overturning or sliding of monoliths—DSTDM emergency action

Activation level Alert Lean Forward Stand Up—1 Stand Up—2 Stand Down Activation • Indications of movement of • Storage level at flood of record, EL • Obvious displacement of one or • Failure in progress or likely due to • Risk assessment has determined trigger monoliths noted such as cracking, 160.85m, OR more monoliths, OR sliding or over turning, OR that sliding or over turning risk has increased seepage, opening of • Increase in movement, pressures or • Evidence of scouring at or near toe • Storage Level at stability factor of reduced joints seepage of dam, OR safety 1.0, EL168.70m • Storage Level at stability factor of safety 1.3, EL 167.49m Action • Review surveillance inspection of • As per previous activation level • As per previous activation level, • As per previous activation level, • Forward information for EER to IC the dam and assess its condition as AND AND email soon as possible • Assess risk and determine if failure • Liaise with the IC and advise on • Return to routine activities • Determine if there are possible likely or in progress need to recommend evacuations failure paths from reported damage • Determine if risks can be reduced • Assess results from foundation by lowering storage (if the storage drain pressure measurements is required to be drawn down, then • Arrange an inspection of the dam the DSTDM needs to assess the and assess its condition as soon as maximum rate of drawn down possible, when safe to do so based on latest available data and • Monitor situation and assess risks advise in writing to IC and DDO). • Record all communication • Liaise with the IC • Determine if remedial repairs are practical

Internal 1. DDO • As per previous activation level • As per previous activation level • As per previous activation level, • As per previous activation level notifications AND 2. IC • CEO—if time permits External 3. DSR • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notification

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7. Dam hazard—chemical spill/toxic conditions

7.1 Overview The emergency action described in this section relates to: • the presence of substantial volumes of chemicals or other potentially toxic contaminants can create a downstream release hazard • the dam hazard can occur due to a traffic or industrial accident, a flood event transporting chemical drums into the storage, or an activity on or near the storage • the dam hazard can impact urban, domestic, or stock users of water either within or downstream of the storage, or on recreational users • the maximum area affected by any spill will depend on whether the river is in flood and/or the spillway is discharging. The maximum affected area of any spill would be the PMF map as an upper limit. Note: This section does not apply for normal operating and monitoring of Blue Green Algae (BGA) within the storage under the Sunwater policy for BGA management (Refer: EM29 BGA Manual).

7.2 Emergency action roles Table 17 to Table 21 specify emergency actions for the following roles: • Dam Duty Officer (DDO) • Local Event Coordinator (LEC) • Incident Coordinator (IC) • Dam Safety Technical Decision Maker (DSTDM)

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Figure 3: Chemical spill/toxic conditions flowchart

ALERT Reports of contamination or potential contamination in the catchment area of the storage.

DDO: Undertake investigations to check the accuracy and details of any reports. o N

DSTDM: :

d DSTDM: Determine if: e Stand Up: Yes c Assess the situation and • WQ testing is required u

d determine need to move • Precautionary closure of e r outlets and treated water k up activation level. s i supply is required. R

Stand Up: No LEC: Liaise with LDMG re: clean up activities.

DSTDM: Monitor and assess if risk R

has been reduced. i s k

r e d u c e d :

N o Risk reduced: Yes

Risk reduced: Yes IC: STAND DOWN Monitor and assess if risk has been reduced.

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Table 17: Chemical spill/toxic conditions—DDO emergency action

Activation level Alert Lean Forward Stand Up Stand Down Activation • Reports of contamination or potential • Not applicable • Confirmation or high probability of a large • Risk assessment that risk has reduced trigger contamination in the catchment area of the amount of chemical spill/toxic conditions found • Confirmation that significant contamination storage (excludes normal operating and in the storage/catchment has not occurred monitoring of BGA) • All clear WQ test result • Escalated BGA or toxic condition from the Sunwater Environmental group Actions • Undertake investigations to ascertain the • Not applicable • Update BGA warning signage if relevant • Forward information for EER to IC email veracity and details of any reports • Collect water samples, if directed • Update Dam Log Book as per SOP 12 • Sketch, measure, photograph, and locate the • Close all outlet works, if directed • Return to routine activities spill’s position in the reservoir/catchment and • Shut off treated water offtakes, if directed record using the approved forms in Appendix • Update Dam Log Book as per SOP 12 D and send to IC & DSTDM • Close storage to recreational use • Update Dam Log Book as per SOP 12 • Liaise with DSTDM • Record all communication NOTE: For normal BGA management (which is excluded) refer to the Sunwater Policy EM29 BGA Manual.

Internal 1. DSTDM • Not applicable 2. DSTDM • As per previous activation level notifications 2. IC 3. IC 4. LEC External • As required • Not applicable 1. Call 000/112 if emergency services are • As per previous activation level notifications required

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Table 18: Chemical spill/toxic conditions—LEC emergency action

Internal 1. IC • Not applicable 1. IC • As per previous activation level notifications 2. DDO 2. DDO External 3. LDMG 1 • Not applicable 3. LDMG 1 • As per previous activation level notification 9. LDMG 2 4. LDMG 2 10. LDMG 3 5. LDMG 3

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Table 19: Chemical spill/toxic conditions—IC emergency action

Activation level Alert Lean Forward Stand Up Stand Down Activation trigger • Reports of contamination or potential • Not applicable • Confirmation or high probability of a large amount • Risk assessment that risk has reduced contamination in the catchment area of the of chemical spill/toxic conditions found in the • Confirmation that significant contamination has storage (excludes normal operating and storage/catchment not occurred monitoring of BGA) • All clear WQ test result • Escalated BGA or toxic condition from the Sunwater Environmental group Actions • Liaise with DDO, DSTDM, and LEC re: situation • Not applicable • Monitor situation and assess risks • Deactivate EAP • Record all communication • Coordinate with the LEC, DSTDM and the Senior • Compile EER and deliver to DSR if required Environmental Health Officer of the relevant • Check WQ Plan for any close out processes NOTE 1: IC to carry out LEC actions unless Council to determine need for WQ testing, shut • Complete situation report LDMG1 is Stood Up down of treated water supplies, and perform • Return to routine activities precautionary closure of outlet works • Complete situation report, unless otherwise NOTE 2: For normal BGA management directed (which is excluded) refer to the Sunwater • SW Incident and Near Miss Alert Policy EM29 BGA Manual. • Consider if any customers in water supply scheme should be notified of the condition. If so, contact customer support on 13 15 89 and have notification messages sent • Record all communication

Internal 1. DDO • Not applicable 13. DSTDM • Inform previous notifications of deactivation as notifications required 11. DSTDM 14. DDO 12. LEC 15. ORR 16. SMT 17. LEC External 3. DDMG 1 • Not applicable 1. D/S Residents & Treated Water Supply Users • As per previous activation level notification 18. DDMG 2 2. DDMG 1 3. DDMG 2

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Table 20: Chemical spill/toxic conditions—LEC and IC communication plan Group to Activation level Trigger for communications Method Message text contact • Reports of contamination or • LDMG 1 Phone Describe current situation with dam—What is the event? (Water Quality) potential contamination in the • LDMG 2 What is the status? (Investigation underway) catchment area of the storage • LDMG 3 Advise of any issues you are aware of (excludes normal operating and Alert • DDMG 1 monitoring of BGA) • DDMG 2 • Escalated BGA or toxic condition from the Sunwater Environmental group Lean Forward LEAN FORWARD NOT APPLICABLE

• Confirmation or high probability of a • LDMG 1 Phone Describe current situation with dam— What is the event? (Water Quality) large amount of chemical spill/toxic • LDMG 2 What is the status? (AVOID USE OR CONTACT WITH WATER) conditions found in the • LDMG 3 Advise of any issues you are aware of storage/catchment • DDMG 1 Advise EAP has been activated • DDMG 2 Stand Up • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: &Treated Sunwater Emergency notification—urgent (Phone for water supply DAM: Burdekin Falls those users EVENT: Water quality without STATUS: Water supply contamination mobiles) ACTION: Avoid use or contact with water • Risk assessment that risk has • LDMG 1 Phone Advise EAP has been deactivated reduced • LDMG 2 Describe current situation with dam—What is the event? (Water Quality) • Confirmation that significant • LDMG 3 What is the status? (Dam hazard Stood Down) contamination has not occurred • DDMG 1 Advise that significant contamination has not occurred and/or the WQ test results are all clear. • All clear WQ test result • DDMG 2 Water is safe to use Stand Down • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: &Treated Sunwater Emergency notification (Phone for water supply DAM: Burdekin Falls those users (if from EVENT: Water quality without Stand Up) STATUS: Dam hazard stood down mobiles) ACTION: Water safe to use

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Table 21: Chemical spill/toxic conditions—DSTDM emergency action

Activation level Alert Lean Forward Stand Up Stand Down Activation • Reports of contamination or potential • Not applicable • Confirmation or high probability of a large • Risk assessment that risk has reduced trigger contamination in the catchment area of the amount of chemical spill/toxic conditions found • Confirmation that significant contamination has storage (excludes normal operating and in the storage/catchment not occurred monitoring of BGA) • All clear WQ test result • Escalated BGA or toxic condition from the Sunwater Environmental group Action • Assess situation and determine need to move • Not applicable • Assess risk and determine actions including • Forward information for EER to IC email to Stand Up need for WQ testing, shut down of treated • Return to routine activities • Monitor situation and assess risks water supplies, and precautionary closure of • Record all communication outlet works NOTE: For normal BGA management • Obtain technical advice from Manager (which is excluded) refer to the Sunwater Environment & Water Planning, if available Policy EM29 BGA Manual. • Liaise with the IC

Internal 1. DDO • Not applicable 1. DDO • As per previous activation level notifications 2. IC 2. IC And CEO—if time permits External 3. DSR • Not applicable 3. DSR • As per previous activation level notifications

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8. Dam hazard—piping: Saddle/Main Dam embankment, foundation, or abutments

8.1 Overview The emergency action described in this section relates to a potential emergency event due to a piping condition through the embankment (Main Dam or Saddle Dams), foundations, or dam abutment. An early indicator of a piping condition can be an increase in seepage or a new area of seepage. If the seepage water is cloudy or has become cloudy, this may indicate that material is being transported and a pipe is being established. If a pipe is established and progresses, then a dam failure may result. If a potential pipe is detected early, remedial repairs maybe possible in the form of constructing a filter and weighting zone over the pipe exit if safe to do so. The flood outlines in Appendix B are there to provide indicative outlines of the maximum potentially affected area of a dam hazard caused by piping. The use of these flood outlines is prescribed below: • Use the Sunny Day Failure (SDF) outline when a dam failure is in progress or likely due to piping and no concurrent flooding or downstream releases are occurring or expected to occur, or • Use the Probable Maximum Flood (PMF) outline when a dam failure is in progress or likely due to piping and concurrent flooding or downstream releases are occurring or expected to occur. Notes: Definitions for Concurrent Flooding and Downstream Releases are provided in Section 1.3 8.1.1 Assessment of circumstances that indicates an increase in the likelihood of piping An increase in seepage or a new area of seepage is a circumstance that could indicate an increase likelihood of piping. This circumstance is the trigger for the alert status for piping. Cloudy seepage water is a circumstance that could indicate an increase likelihood of piping. This circumstance is the trigger for the lean forward status for piping.

8.2 Emergency action roles Table 22 to Table 26 specify emergency actions for the following roles: • Dam Duty Officer (DDO) • Local Event Coordinator (LEC) • Incident Coordinator (IC) • Dam Safety Technical Decision Maker (DSTDM)

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Figure 4: Piping: Saddle/Main Dam embankment, foundation, or abutments flowchart

ALERT (LEAN FORWARD IF WATER CLOUDY) Increasing leakage through foundation or abutments.

DSTDM: Arrange inspection ASAP.

DSTDM: DSTDM: Stand Up: Yes DSTDM: Determine if: No • Remedial repairs are practical Has piping condition been Is failure likely or in • Risk can be reduced by established? progress? lowering storage.

Supervise remedial works. Risk reduced: Risk No reduced: Stand Up: No Yes

LEC:

Risk reduced: Noreduced:Risk Liaise with LDMG. LEC: Liaise with LDMG re: evacuations. DSTDM: Monitor and assess if risk has been reduced.

Risk reduced: Yes

Risk reduced: Yes DSTDM: STAND DOWN Monitor and assess if risk has been reduced.

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Table 22: Piping: Saddle/Main Dam embankment, foundation, or abutments—DDO emergency action

Activation level Alert Lean Forward Stand Up—1 Stand Up—2 Stand Down Activation • Increasing leakage through the • Increasing leakage through the • Piping condition has been • Failure in progress or likely due to • Risk assessment has determined trigger embankment, the foundations, or embankment, the foundations, or established piping, AND that piping risk has reduced abutments abutments with cloudy water • Sufficient water in storage to create a dam failure risk Actions • Monitor flows every 6 hours (or as • As per previous activation level • As per previous activation level, • As per previous activation level, • Forward information for EER to IC otherwise instructed by the AND AND email DSTDM) until a decreasing trend is • Support/supervise remedial works • Vacate the immediate vicinity of the • Update Dam Log Book as per SOP observable, or as directed by the IC as required piping condition 12 • Photograph/video the piping from a • Lower the storage if directed • Ensure remedial works cease and • Return to routine activities safe point and record using the • Close any affected roads if not plant and personnel have been approved forms in Appendix D and already closed by others moved to a safe location send to IC & DSTDM • Maintain surveillance of area • Notify SO immediately downstream of dam (if • Update Dam Log Book as per SOP safe to do so) and move on any 12 members of the public • Record all communication

Internal 1. DSTDM • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications 2. IC 3. SO External • As required • As required • As required • As required • As per previous activation level notifications

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Table 23: Piping: Saddle/Main Dam embankment, foundation, or abutments—LEC emergency action

Internal 1. IC • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications 2. DDO

External 3. LDMG 1 • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications 19. LDMG 2 20. LDMG3

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Table 24: Piping: Saddle/Main Dam embankment, foundation, or abutments—IC emergency action

Activation level Alert Lean Forward Stand Up—1 Stand Up—2 Stand Down Activation • Increasing leakage through the • Increasing leakage through the • Piping condition has been • Failure in progress or likely due to • Risk assessment has determined trigger embankment, the foundations, or embankment, the foundations, or established piping, and that piping risk has reduced abutments abutments with cloudy water • Sufficient water in storage to create a dam failure risk Actions • Liaise with DDO, LEC and DSTDM • As per previous activation level, • As per previous activation level, • As per previous activation level, • Deactivate EAP re: situation AND AND AND • Compile EER and deliver to DSR if • Complete Situation Report, unless • Investigate availability of machinery • Mobilise resources to undertake • Direct remedial works to cease if required otherwise directed and materials (if insufficient remedial works if directed by directed by the DSTDM and plant • Complete Situation Report (final) • Record all communication stockpiles available) DSTDM and personnel to be moved to a safe • Return to routine activities • SW Incident and Near Miss Alert • Place machinery operators on location standby if directed by DSTDM NOTE: IC to carry out LEC • Consider the need to appoint a actions unless LDMG1 is recovery coordinator. The recovery Stood Up coordinator is then responsible for the follow through on actions to close out all matters and works outstanding after the initial emergency is over.

Internal 1. DSTDM • As per previous activation level • As per previous activation level • As per previous activation level • Inform previous notifications of notifications deactivation as required 2. DDO 3. LEC 4. ORR 5. SMT External • As required • As per previous activation level, • As per previous activation level, • As per previous activation level • As per previous activation level notifications AND AND 1. DDMG 1 1. D/S Residents 2. DDMG 2 2. SDCC watch Desk

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Table 25: Piping: Saddle/Main Dam embankment, foundation, or abutments—LEC & IC communication plan Activation Trigger for communications Group to contact Method Message text level • Increasing leakage through an • LDMG 1 Phone Describe current situation with dam—What is the event? (Unconfirmed piping risk) embankment, the foundations, • LDMG 2 What is the status? (Unconfirmed leakage—Investigation continues) Alert or abutments • LDMG 3 Advise of current storage level Advise any issues you are aware of Standby for further advices • Increasing leakage through an • LDMG 1 Phone Describe current situation with dam—What is the event? (Unconfirmed piping risk) embankment, the foundations, • LDMG 2 What is the status? (Unconfirmed leakage—Investigation continues) Advise of current storage level Lean Forward or abutments with cloudy water • LDMG 3 • DDMG 1 Advise any issues you are aware of • DDMG 2 Standby for further advices

• Piping condition has been • LDMG 1 Phone Describe current situation with dam—What is the event? (Confirmed piping risk). established • LDMG 2 What is the status? (Confirmed piping/leakage) • LDMG 3 Advise of current storage level • DDMG 1 Advise any issues you are aware of. Discuss any potential road/bridge closures • DDMG 2 Prepare for possible evacuations • SDCC Watch Email & Complete Emergency Alert Request Form as per instructions (blank copy in Appendix D) and email to SDCC Watch Stand Up—1 Desk Phone Desk to send. • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for Sunwater Emergency notification those without DAM: Burdekin Falls mobiles) EVENT: Dam safety risk—piping STATUS: Confirmed—piping/leakage ACTION: Possible issue at dam listen for further advice

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Table 25 (Continued): Piping: Saddle/Main Dam embankment, foundation, or abutments—LEC and IC communication plan Activation Trigger for communications Group to contact Method Message text level • Failure likely due to piping, AND • LDMG 1 Phone Describe current situation with dam—What is the event? (Confirmed piping risk) • Sufficient water in storage to • LDMG 2 What is the status? (Possible Dam Failure) create a dam failure risk • LDMG 3 Advise of current storage level • DDMG 1 Prepare coordinated evacuations • DDMG 2 • SDCC Watch Email & Complete Emergency Alert Request Form as per instructions (blank copy in Appendix D) and email to SDCC Watch Desk Phone Desk to send. • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for Sunwater Emergency notification—urgent those without DAM: Burdekin Falls mobiles) EVENT: Dam safety risk—piping STATUS: Dam failure likely ACTION: Possible evacuation follow instructions of emergency services Stand Up—2 • Dam Failure in progress • LDMG 1 Phone Describe current situation with dam—What is the event? (Confirmed piping risk) • LDMG 2 What is the status? (Dam Failure In Progress) • LDMG 3 Advise of current storage level • DDMG 1 Coordinate evacuations of affected Downstream Residents and move people to higher ground • DDMG 2 • SDCC Watch Email & Complete Emergency Alert Request Form as per instructions (blank copy in Appendix D) and email to SDCC Watch Desk Phone Desk to send. SMS text as follows: BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION AND LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION those without AND LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO mobiles) • Risk assessment has • LDMG 1 Phone Describe current situation with Dam—What is the event? (Dam Safety Risk—piping) determined that piping risk has • LDMG 2 What is the status? (Dam hazard Stood Down) reduced • LDMG 3 Advise risk assessment has determined that piping risk has reduced and EAP has been deactivated • DDMG 1 • DDMG 2 Stand Down • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for Sunwater Emergency notification those without DAM: Burdekin Falls mobiles) EVENT: Dam safety risk—piping STATUS: Dam hazard stood down ACTION: None

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Table 26: Piping: Saddle/Main Dam embankment, foundation, or abutments—DSTDM emergency action

Activation level Alert Lean Forward Stand Up—1 Stand Up—2 Stand Down Activation • Increasing leakage through the • Increasing leakage through the • Piping condition has been • Failure in progress or likely due to • Risk assessment has determined trigger embankment, the foundations, or embankment, the foundations or established piping, AND that piping risk has reduced abutments abutments with cloudy water • Sufficient water in storage to create a dam failure risk Action • Arrange an inspection of the dam to • As per previous activation level • Assess risk and determine if failure • As per previous activation level, • Forward information for EER to IC assess its condition as soon as likely or in progress AND email possible, when safe to do so • Liaise with the IC • Liaise with the IC and advise on • Return to routine activities • Determine if piping condition has • Determine if remedial repairs are need to recommend evacuations been established practical • Monitor situation and assess risks • Determine if risks can be reduced • Record all communication by lowering storage (if the storage is required to be drawn down, then the DSTDM needs to assess the maximum rate of drawn down based on latest available data and advise in writing to IC and DDO) • Supervise* remedial repairs (if applicable) • Monitor situation and assess risks Internal 1. DDO • As per previous activation level • As per previous activation level • As per previous activation level, • As per previous activation level notifications AND 2. IC • CEO—if time permits Internal 3. DSR • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications

* Supervision means provide technical oversight to the work. It does not necessarily mean on-site supervision.

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9. Dam hazard—earthquake

9.1 Overview The emergency action described in this section relates to a potential emergency event due to an earthquake causing damage to the dam embankment (Main Dam or Saddle Dams), foundations, or dam abutment. Damage could take the form of cracking or slumping of the embankment, deformation or land slip, or increased seepage. If damage does occur, then a dam failure may result. If damage is detected early, remedial repairs may be possible depending on the nature of the damage. The flood outlines in Appendix B are there to provide indicative outlines of the maximum potentially affected area of a dam hazard caused by earthquake. The use of these flood outlines is prescribed below: • Use the Sunny Day Failure (SDF) outline when a dam failure is in progress or likely due to earthquake and no concurrent flooding or downstream releases are occurring or expected to occur, or • Use the Probable Maximum Flood (PMF) outline when a dam failure is in progress or likely due to earthquake and concurrent flooding or downstream releases are occurring or expected to occur. Notes: Definitions for Concurrent Flooding and Downstream Releases are provided in Section 1.3

9.2 Emergency action roles Table 27 to Table 31 specify emergency actions for the following roles: • Dam Duty Officer (DDO) • Local Event Coordinator (LEC) • Incident Coordinator (IC) • Dam Safety Technical Decision Maker (DSTDM)

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Figure 5: Earthquake flowchart

DSTDM:ALERT Has piping condition been Tremor felt or reported. established?

DDO: MM > 5 LEAN FORWARD Assess severity using DDO: Modified Mercalli (MM) scale. Immediate surveillance inspection.

MM < 5 LEAN FORWARD DSTDM: DDO: Assess surveillance report. Undertake surveillance inspection during daylight hours.

Yes DSTDM: Determine if: DSTDM: Yes DSTDM: No • Remedial repairs are practical Has possible failure path Is failure likely or in • Risk can be reduced by DDO: been identified? progress? lowering storage. Has any change been Supervise remedial works.

noted? Risk reduced: No

Yes

LEC: Liaise with LDMG. LEC: No No Liaise with LDMG re: evacuations.

Risk reduced: Yes DSTDM: STAND DOWN Monitor and assess if risk has been reduced.

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The Modified Mercalli (MM) Scale is located in Forms in Appendix D Toolbox. Burdekin Falls–2020/21–i8.2

Table 27: Earthquake—DDO emergency action

Activation level Alert Lean Forward Stand Up—1 Stand Up—2 Stand Down Activation trigger • Earthquake reported or felt in the area, • Earthquake reported or felt in the area, • Earthquake reported or felt in the area, • Failure in progress or likely due to • Risk assessment has been AND AND AND earthquake, AND determined that failure risk has • Intensity less than 5MM* • Intensity greater than or equal to • A possible failure path has been • Sufficient water in storage to create a reduced 5MM*, OR identified dam failure risk • Intensity less than 5MM and change detected during surveillance inspection Actions • Inspect the dam wall, embankment, • As per previous activation level, AND • As per previous activation level, AND • As per previous activation level • Forward information for EER to IC spillway structure, and abutments in • Immediately inspect the dam wall, • Support/supervise remedial work as email daylight hours (if safe to do so) and embankment, spillway structure, and required • Update Dam Log Book as per SOP 12 report to the DSTDM and IC— abutments (if safe to do so) and report • Lower the storage if directed • Return to routine activities photograph/video and record using the to the DSTDM and IC (unless • Close any affected roads, if not approved forms in Appendix D and inspection completed in Alert Stage)— already closed by others send to IC & DSTDM photograph/video and record using • Maintain surveillance of area • Check for leaks, deformation, erosion, approved forms in Appendix D and immediately downstream of dam (if and concrete damage send to IC & DSTDM safe to do so) and move on any • Notify SO • Repeat the inspection as directed members of the public • Update Dam Log Book as per SOP 12 • Vacate the immediate vicinity of the • Record all communication embankment Internal 1. DSTDM • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications 2. IC 3. SO External • As required • As required • As required • As required • As per previous activation level notifications

* DDO to assess magnitude (MM scale) at dam location.

The Modified Mercalli (MM) Scale is located in Forms in Appendix D Toolbox. Burdekin Falls–2020/21–i8.2

Table 28: Earthquake—LEC emergency action

Internal 1. IC • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications 2. DDO

External 3. LDMG 1 • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications 4. LDMG 2 5. LDMG 3

The Modified Mercalli (MM) Scale is located in Forms in Appendix D Toolbox. Burdekin Falls–2020/21–i8.2

Table 29: Earthquake—IC emergency action

Activation level Alert Lean Forward Stand Up—1 Stand Up—2 Stand Down Activation trigger • Earthquake reported or felt in the • Earthquake reported or felt in the • Earthquake reported or felt in the • Failure in progress or likely due to • Risk assessment has been area, AND area, AND area, AND earthquake, AND determined that failure risk has • Intensity less than 5MM • Intensity greater than or equal to • A possible failure path has been • Sufficient water in storage to create a reduced 5MM, OR identified dam failure risk • Intensity less than 5MM and change detected during surveillance inspection Actions • Liaise with DDO and DSTDM re: • As per previous activation level, AND • As per previous activation level, AND • As per previous activation level • Deactivate EAP situation • Investigate availability of machinery • Liaise with DDO and relevant • Compile EER and deliver to DSR if • Record all communication and materials (if insufficient Council(s) regarding potential required stockpiles available) road/bridge closures • Complete Situation Report (final) NOTE: IC to carry out LEC • Place machinery operators on • Mobilise resources to undertake • Return to routine activities actions unless LDMG1 is standby if directed by DSTDM remedial works if directed by Stood Up • Complete Situation Report, unless DSTDM otherwise directed • SW Incident and Near Miss Alert

Internal 1. DDO • As per previous activation level • As per previous activation level • As per previous activation level • Inform previous notifications of notifications deactivation as required 2. DSTDM 3. LEC 4. ORR 5. SMT External • As required • As per previous activation level, AND • As per previous activation level, AND • As per previous activation level • As per previous activation level notifications 1. DDMG 1 1. D/S Residents 2. DDMG 2 2. SDCC Watch Desk

The Modified Mercalli (MM) Scale is located in Forms in Appendix D Toolbox. Burdekin Falls–2020/21–i8.2

Table 30: Earthquake—LEC and IC communication plan Activation Trigger for communications Group to contact Method Message text level • Earthquake reported or felt • LDMG 1 Phone Describe current situation with dam—What is the event? (Dam Safety Risk— Earthquake felt or reported in area) in the area, AND • LDMG 2 What is the status? (Under investigation) Alert • Intensity less than 5MM • LDMG 3 Advise of current storage level Stand by for further information • Earthquake reported or felt • LDMG 1 Phone Describe current situation with dam—What is the event? (Dam Safety Risk— Earthquake felt or reported in area) in the area, AND • LDMG 2 What is the status? (Under investigation) • Intensity greater than or Advise of current storage level Lean • LDMG 3 equal to 5MM, OR Stand by for further information Forward • DDMG 1 • Intensity less than 5MM and • DDMG 2 change detected during surveillance inspection • Earthquake reported or felt • LDMG 1 Phone Describe current situation with dam—What is the event? (Dam Safety Risk—Earthquake felt or reported in area) in the area, AND • LDMG 2 What is the status? (Possible earthquake damage to dam) • A possible failure path has • LDMG 3 Advise of current storage level. Discuss any potential road/ bridge closures been identified • DDMG 1 Activate emergency response • DDMG 2 • SDCC Watch Email & Phone Complete Emergency Alert Request Form as per instructions (blank copy in Appendix D) and email to SDCC Watch Desk to Stand Up—1 Desk send. Develop messages in consultation with DSTDM. • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for those Sunwater Emergency notification without mobiles) DAM: Burdekin Falls EVENT: Dam safety risk—earthquake damage STATUS: Confirmed—earthquake damage ACTION: Possible issue at dam listen for further advice

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The Modified Mercalli (MM) Scale is located in Forms in Appendix D Toolbox. Burdekin Falls–2020/21–i8.2

Table 30 (Continued): Earthquake—LEC and IC communication plan Activation Trigger for communications Group to contact Method Message text level • Failure likely due to • LDMG 1 Phone Describe current situation with dam—What is the event? (Dam Safety Risk—Earthquake damage) earthquake, AND • LDMG 2 What is the status? (Dam Failure Likely) • Sufficient water in storage • LDMG 3 Advise of current storage level. Discuss any potential road/bridge closures to create a dam failure risk • DDMG 1 Prepare coordinated evacuation • DDMG 2 • SDCC Watch Email & Phone Complete Emergency Alert Request Form as per instructions (blank copy in Appendix D) and email to SDCC Watch Desk to Desk send. Develop messages in consultation with DSTDM • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for those Sunwater Emergency notification—urgent without mobiles) DAM: Burdekin Falls EVENT: Dam safety risk—earthquake damage STATUS: Dam failure likely Stand Up—2 ACTION: Possible evacuation follow instructions of emergency services • Dam Failure in progress • LDMG 1 Phone Describe current situation with dam—What is the event? (Dam Safety Risk—Earthquake damage) • LDMG 2 What is the status? (Dam Failure In Progress) • LDMG 3 Advise of current storage level • DDMG 1 Coordinate evacuation of Downstream Residents and move people to higher ground • DDMG 2 • SDCC Watch Email & Phone Complete Emergency Alert Request Form as per instructions (copies in Appendix A8 and Appendix D) and email to SDCC Watch Desk Desk to send. SMS text as follows: BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION AND LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for those BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION AND without mobiles) LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO • Risk assessment has been • LDMG 1 Phone Describe current situation with dam—What is the event? (Dam Safety Risk—Earthquake damage) determined that failure risk • LDMG 2 What is the status? (Dam hazard Stood Down) has reduced • LDMG 3 Advise risk assessment has been determined that failure risk has reduced and that EAP has been deactivated • DDMG 1 • DDMG 2 Stand Down • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for those Sunwater Emergency notification without mobiles) DAM: Burdekin Falls EVENT: Dam safety risk—earthquake damage STATUS: Dam hazard stood down ACTION: None

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The Modified Mercalli (MM) Scale is located in Forms in Appendix D Toolbox. Burdekin Falls–2020/21–i8.2

Table 31: Earthquake—DSTDM emergency action

Activation level Alert Lean Forward Stand Up—1 Stand Up—2 Stand Down Activation • Earthquake reported or felt in the • Earthquake reported or felt in the • Earthquake reported or felt in the • Failure in progress or likely due to • Risk assessment has been trigger area, AND area, AND area, AND earthquake, AND determined that failure risk has • Intensity less than 5MM • Intensity greater than or equal to • A possible failure path has been • Sufficient water in storage to create reduced 5MM, OR identified a dam failure risk • Intensity less than 5MM and change detected during surveillance inspection Action • Monitor situation and assess risks • As per previous activation level, • As per previous activation level, • As per previous activation level • Forward information for EER to IC • Liaise with DDO AND AND email • Record all communication • Review surveillance inspection of • Arrange an inspection of the dam • Return to routine activities the dam and assess its condition as and assess its condition as soon as NOTE: ‘Reported’ is defined as an soon as possible possible, when safe to do so alert received from Geoscience • Determine if there are any possible • Assess risk and determine if failure Australia or other source that failure paths from reported damage likely or in progress advises an Earthquake >4.8ML • Liaise with the IC (Richter Scale) has occurred within • Determine if remedial repairs are a 200km radius of the Dam practical • Supervise* remedial repairs (if applicable)

Internal 1. DDO • As per previous activation level • As per previous activation level, • As per previous activation level • As per previous activation level notifications AND 2. IC • CEO—if time permits

External 3. DSR • As per previous activation level • As per previous activation level • As per previous activation level • As per previous activation level notifications

* Supervision means provide technical oversight to the work. It does not necessarily mean on-site supervision.

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10. Dam hazard—terrorist threat/activity or high energy impact

10.1 Overview The emergency action described in this section relates to a potential emergency event due to a terrorist threat or activity or a high energy impact on the dam such as a plane crash or meteorite. The vulnerability of Burdekin Falls Dam to a terrorist attack is low. The flood outlines in Appendix B are there to provide indicative outlines of the maximum potentially affected area of a dam hazard caused by terrorist threat/activity or high energy impact. The use of these flood outlines is prescribed below: • Use the Sunny Day Failure (SDF) outline when a dam failure is in progress or likely due to terrorist threat/activity or high energy impact and no concurrent flooding or downstream releases are occurring or expected to occur, or • Use the Probable Maximum Flood (PMF) outline when a dam failure is in progress or likely due to terrorist threat/activity or high energy impact and concurrent flooding or downstream releases are occurring or expected to occur. Notes: Definitions for Concurrent Flooding and Downstream Releases are provided in Section 1.3 10.1.1 Assessment of circumstances that indicates an increase in the likelihood of terrorist activity or high energy impact Advice from authorities of a specific risk to water infrastructure is a circumstance that could indicate increased likelihood a terrorist threat. If this were specific enough to name a dam, this circumstance would trigger Stand Up— 1 activation level.

10.2 Emergency action roles Table 32 to Table 36 specify emergency actions for the following roles: • Dam Duty Officer (DDO) • Local Event Coordinator (LEC) • Incident Coordinator (IC) • Dam Safety Technical Decision Maker (DSTDM)

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Figure 6: Terrorist threat/activity or high energy impact flowchart

THREAT EVENT Threat received or Large explosion or suspicious activity impact. observed.

DDO: DDO: Notify National Security or 000/112. Notify National Security or 000/112.

DDO: DDO: Inspect dam (if safe) and ensure all Immediate surveillance inspection. security measures are in place.

IC: DSTDM: Assess risks. Assess surveillance report.

DSTDM: Determine if: DSTDM: DSTDM: • Remedial repairs are practical IC: Yes No Has possible failure path Is failure likely or in • Risk can be reduced by Have risks been reduced? lowering storage. been identified? progress?

Supervise remedial works. Risk Risk reduced: No

Yes

IC & LEC: Liaise with Police and LDMG. LEC: Yes No Liaise with LDMG re: evacuations.

Risk reduced: Yes DSTDM: STAND DOWN Monitor and assess if risk has been reduced.

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Table 32: Terrorist threat/activity or high energy impact—DDO emergency action

Activation level Alert/Lean Forward Stand Up—1 Stand Up—2 Stand Up—3 Stand Down Activation • Not applicable THREAT EVENT RESPONSE • Risk assessment has determined trigger • Possible terrorist activity/suspicious • Large explosion heard/observed at • Failure in progress or likely due to that failure risk has reduced behaviour noticed at the dam, OR dam (e.g., bomb explosion, aircraft impact or explosion, AND • Threat received hit) • Sufficient water in storage to create a dam failure risk Actions • Not applicable • NOTE: If any suspicious behaviour • As per previous activation level, • As per previous activation level, • Forward information for EER to IC noticed, contact DSTDM for advice. AND AND email If instructed by DTDSM, of if threat • Undertake surveillance inspect dam • Lower reservoir level, if directed • Update Dam Log Book as per SOP received, complete the following: (if safe) • Inspect Saddle Dams 12 • Notify National Security or 000/112 • Vacate the immediate vicinity of the • Return to routine activities • Inspect dam (if safe) and ensure all affected area security measures are in place (locked gates, etc.) • Photograph/video the damage from a safe point and record using the approved forms in Appendix D and send to IC & DSTDM • Close any affected roads, if not already closed by others • Notify SO • Update Dam Log Book as per SOP 12 • If Police appoint incident manager support and follow instructions • Record all communication

Internal • Not applicable 2. DSTDM • As per previous activation level • As per previous activation level • As per previous activation level notifications 3. IC 4. SO External • Not applicable 1. CTG • As per previous activation level • As per previous activation level • As per previous activation level notifications

Burdekin Falls–2020/21–i8.2

Table 33: Terrorist threat/activity or high energy impact—LEC emergency action

Activation level Alert/Lean Forward Stand Up—1 Stand Up—2 Stand Up—3 Stand Down Activation trigger • Not applicable THREAT EVENT RESPONSE • Risk assessment has determined • Possible terrorist activity/suspicious • Large explosion heard/observed at • Failure in progress or likely due to that failure risk has reduced behaviour noticed at the dam, OR dam (e.g., bomb explosion, aircraft impact or explosion, AND • Threat received hit) • Sufficient water in storage to create a dam failure risk Actions • Not applicable • Liaise with DDO, IC and LDMG re: • As per previous activation level • As per previous activation level, • Forward information for EER to IC situation AND email • If Police appoint incident manager, • Liaise with DDO and LDMG re: • Return to routine activities support and follow instructions potential for evacuations • Liaise with DDO and relevant Council(s) regarding possible road/bridge closures • Record all communication Internal • Not applicable 1. DDO • As per previous activation level • As per previous activation level • As per previous activation level notifications 2. IC External • Not applicable 3. LDMG 1 • As per previous activation level • As per previous activation level • As per previous activation level notifications 4. LDMG 2 5. LDMG 3

Burdekin Falls–2020/21–i8.2

Table 34: Terrorist threat/activity or high energy impact—IC emergency action

Activation level Alert/Lean Forward Stand Up—1 Stand Up—2 Stand Up—3 Stand Down Activation trigger • Not applicable THREAT EVENT RESPONSE • Risk assessment has determined • Possible terrorist activity/suspicious • Large explosion heard/observed at • Failure in progress or likely due to that failure risk has reduced behaviour noticed at the dam, OR dam (e.g., bomb explosion, aircraft impact or explosion, AND • Threat received hit) • Sufficient water in storage to create a dam failure risk Actions • Not applicable • Liaise with DDO, DSTDM, and LEC • As per previous activation level • As per previous activation level, • Deactivate EAP event re: situation AND • Compile EER and deliver to DSR if • Complete Situation Report, unless • Liaise with DDO, DSTDM, and LEC required otherwise directed re: potential for evacuations • Complete Situation Report (final) • If Police appoint incident manager • Mobilise resources to undertake • Return to routine activities support and follow instructions remedial works if directed by • Monitor situation and assess risks DSTDM • Record all communication • SW Incident and Near Miss Alert

NOTE: IC to carry out LEC actions unless LDMG1 is Stood Up

Internal • Not applicable 4. DDO • As per previous activation level • As per previous activation level • Inform previous notifications notifications deactivation as required 5. DSTDM 6. LEC 7. ORR 8. SMT External • Not applicable 1. CTG (if not completed by DDO) • As per previous activation level, • As per previous activation level • As per previous activation level notifications AND 2. DDMG 1 1. D/S Residents 3. DDMG 2 2. SDCC Watch Desk

Burdekin Falls–2020/21–i8.2

Table 35: Terrorist threat/activity or high energy impact—LEC and IC communication plan Activation Trigger for communications Group to contact Method Message text level Alert ALERT NOT APPLICABLE Lean Forward LEAN FORWARD NOT APPLICABLE THREAT • LDMG 1 Phone Describe current situation with dam—What is the event? (Dam Safety Risk—Security threat/ impact/explosion, etc.) • Possible terrorist • LDMG 2 What is the status? (Received/noted terrorist threat) activity/suspicious • LDMG 3 Discuss any potential road/bridge closures Stand Up—1 behaviour noticed at the • DDMG 1 Activate emergency response dam, OR • DDMG 2 • Threat received • CTG EVENT • LDMG 1 Phone Describe current situation with dam—What is the event? (Dam Safety Risk—Security threat/ impact/explosion, etc.) • Large explosion • LDMG 2 What is the status? (Under Investigation) heard/observed at dam • LDMG 3 Discuss any potential road/bridge closures (if not discussed at Stand Up—1) (e.g., bomb explosion, • DDMG 1 Prepare coordinated evacuation aircraft hit) • DDMG 2 • CTG • SDCC Watch desk Email & Complete Emergency Alert Request Form as per instructions (blank copy in Appendix D) and email to SDCC Watch Desk Stand Up—2 Phone to send. Develop messages in consultation with DSTDM • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for Sunwater Emergency notification—urgent those without DAM: Burdekin Falls mobiles) EVENT: Dam safety risk—security threat/impact/explosion STATUS: Under investigation ACTION: Possible evacuation follow instructions of emergency services

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Table 35 (Continued): Terrorist threat/activity or high energy impact—LEC and IC communication plan Activation Trigger for communications Group to contact Method Message text level RESPONSE • LDMG 1 Phone Describe current situation with dam—What is the event? (Dam Safety Risk—Security threat/ impact/ explosion, etc.) • Failure in progress or likely • LDMG 2 What is the status? (Dam Failure Likely/In Progress) due to impact or explosion, • LDMG 3 Initiate evacuations AND • DDMG 1 • Sufficient water in storage • DDMG 2 to create a dam failure risk • SDCC Watch desk Email & Complete Emergency Alert Request Form as per instructions (copies in Appendix A8 and Appendix D) and email to Stand Up—3 Phone SDCC Watch Desk to send. SMS text as follows: BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION AND LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION those without AND LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO mobiles) • Risk assessment has • LDMG 1 Phone Describe current situation with dam—What is the event? (Dam Safety Risk—Security threat/ impact/explosion, etc.) determined that failure risk • LDMG 2 What is the status? (Dam hazard Stood Down) has reduced • LDMG 3 Advise that failure risk has been reduced and EAP has been deactivated • DDMG 1 • DDMG 2 Stand Down • D/S Residents SMS Liaise with Sunwater Customer Support to send SMS: (Phone for Sunwater Emergency notification those without DAM: Burdekin Falls mobiles) EVENT: Dam safety risk—security threat/impact/explosion STATUS: Dam hazard stood down ACTION: None

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Table 36: Terrorist threat/activity or high energy impact—DSTDM emergency action

Activation level Alert/Lean Forward Stand Up—1 Stand Up—2 Stand Up—3 Stand Down Activation • Not applicable THREAT EVENT RESPONSE • Risk assessment has determined trigger • Possible terrorist activity/suspicious • Large explosion heard/observed at • Failure in progress or likely due to that failure risk has reduced behaviour noticed at the dam, OR dam (e.g. bomb explosion, aircraft impact or explosion, and • Threat received hit) • Sufficient water in storage to create a dam failure risk Action • Not applicable • Liaise with IC and DDO • As per previous activation level, • As per previous activation level, • Forward information for EER to IC • Liaise with Sunwater Executive AND AND • Return to routine activities • Record all communication • Arrange an inspection of the dam • Liaise with the IC and advise on and assess its condition as soon as need to recommend evacuations possible, when safe to do so • Assess risk and determine if failure likely or in progress • Determine if remedial repairs are practical • Determine if risks can be reduced by lowering storage (if the storage is required to be drawn down, then the DSTDM needs to assess the maximum rate of drawn down based on latest available data and advise in writing to IC and DDO). • Supervise* remedial repairs (if applicable) • Monitor situation and assess risks

Internal • Not applicable 1. DDO • As per previous activation level • As per previous activation level, • As per previous activation level notifications AND 2. IC • CEO—if time permits

External • Not applicable 3. DSR • As per previous activation level • As per previous activation level • As per previous activation level notifications

* Supervision means provide technical oversight to the work. It does not necessarily mean on-site supervision.

Burdekin Falls–2020/21–i8.2

11. Other emergency situation—communications failure

11.1 Overview The emergency action described in this section (other emergency situation—communications failure) relates to either: • An emergency situation where all means of communication at the Dam site have been lost. • An emergency situation where all means of communication with the Local area have been lost. • An emergency situation where all means of communication with Brisbane site have been lost. This section specifies actions and provides guidance for the three situations.

11.2 Emergency actions Due to the large number of different possible scenarios, the table below only covers the most common or likely conditions. 11.2.1 Activation triggers Table 37: Communications failure emergency activation trigger summary

• Unable to communicate to or from Dam site (usually Comms Failure – Site affects DDO)

• Unable to communicate to or from Local Area (likely to Comms Failure – Local area affect LEC or SM)

• Unable to communicate to or from Sunwater Brisbane Comms Failure – Brisbane (could affect DSTDM or FODM & will affect IC)

11.2.2 Assessment of circumstances that indicates the likelihood of communications failure escalating the activation level of a current Dam Hazard The Operations Centre Duty Officer (OCDO) will assess the weather and flood warnings daily in accordance with the Operations Centre (OC) SOP. The OCDO will escalate to the Flood Operations Decision Maker (FODM) any warnings that have the potential to cause a significant communications failure. The on-call IC will escalate to the FODM any local intelligence on conditions that could increase the probability of a significant communications failure. The FODM will determine whether it is reasonably likely that there will be a significant communications failure within the subsequent 24 hours and assess the likely effect on current Dam Hazards. If required the FODM will instruct the IC to escalate the activation level of any current Dam Hazards. 11.2.3 Emergency action roles Table 38 to Table 43 specify emergency actions for the following roles: • Dam Duty Officer (DDO) • Local Event Coordinator (LEC) • Incident Coordinator (IC) • Dam Safety Technical Decision Maker (DSTDM) • Flood Operations Decision Maker (FODM)

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Table 38: Communications failure—DDO emergency action

Activation level Comms Failure – Local Area Comms Failure – Brisbane

Activation trigger • Unable to communicate to Local Area including LEC or SM • Unable to communicate to Sunwater Brisbane including IC or DSTDM or FODM

Actions • As much as practicable assume the role of LEC • Determine if LEC is in communication and if not, assume the LEC role as much as is practicable • Continue tasks in accordance with any other current Emergency Action • Continue tasks in accordance with any other current Emergency Action • Every hour attempt communications by all means, noting the following: • Every hour attempt communications by all means, noting the following: - Mobile phone-try texting instead of voice, much higher probability of success - Mobile phone-try texting instead of voice, much higher probability of success - Satellite Phone-needs to access open sky unless external antenna fitted - Satellite Phone-needs to access open sky unless external antenna fitted - Fax-generally uses fixed landline and is therefore less likely to have failed - Fax-generally uses fixed landline and is therefore less likely to have failed - Social Media-e.g. Facebook (Internet may be available via landline) - Social Media-e.g. Facebook (Internet may be available via landline) • Record all communication and attempts via Dam Log Book entries as per SOP 12 and • Record all communication and attempts via Dam Log Book entries as per SOP 12 and communications log if EAP event is current communications log if EAP event is current Internal notifications 1. IC 1. LEC 2. SO (if available) 2. SO (if available) External notifications • As required • As required

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Table 39: Communications failure—LEC emergency action

Activation level Comms Failure – Dam Site Comms Failure – Brisbane

Activation trigger • Unable to communicate to Dam site • Unable to communicate to Sunwater Brisbane including IC or DSTDM or FODM Actions • Every hour attempt communications by all means, noting the following: • Issue Sunwater Incident Alert - Mobile phone-try texting instead of voice, much higher probability of success • Every hour attempt communications by all means, noting the following: - Satellite Phone-needs to access open sky unless external antenna fitted - Mobile phone-try texting instead of voice, much higher probability of success - Fax-generally uses fixed landline and is therefore less likely to have failed - Satellite Phone-needs to access open sky unless external antenna fitted - Social Media-e.g. Facebook (Internet may be available via landline) - Fax-generally uses fixed landline and is therefore less likely to have failed • Record all communication and attempts - Social Media-e.g. Facebook (Internet may be available via landline) • Assume that the DDO is carrying out LEC role at site as much as practicable • Record all communication and attempts • Liaise with IC • Liaise with the DDO and assume IC role • Liaise with DSTDM • As much as is practicable continue other tasks associated with the role in accordance with any other • As much as is practicable continue other tasks associated with the role in accordance with any other current Emergency Action current Emergency Action

Internal 1. IC 1. DDO notifications 2. DSTDM 2. DSTDM (if available) 3. SO (if available) 3. SO External 4. LDMGs 4. LDMGs notifications 5. DDMGs

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Table 40: Communications failure—IC emergency action

Activation level Comms Failure – Dam Site Comms Failure – Local Area

Activation trigger • Unable to communicate to Dam site • Unable to communicate to Local Area including LEC and SM Actions • Issue Sunwater Incident Alert • Issue Sunwater Incident Alert • Every hour attempt communications by all means, noting the following: • Every hour attempt communications by all means, noting the following: - Mobile phone-try texting instead of voice, much higher probability of success - Mobile phone-try texting instead of voice, much higher probability of success - Satellite Phone-needs to access open sky unless external antenna fitted - Satellite Phone-needs to access open sky unless external antenna fitted - Fax-generally uses fixed landline and is therefore less likely to have failed - Fax-generally uses fixed landline and is therefore less likely to have failed - Social Media-e.g. Facebook (Internet may be available via landline) - Social Media-e.g. Facebook (Internet may be available via landline) • Record all communication and attempts • Record all communication and attempts • Liaise with LEC • Liaise with the DDO and carry out functions of the LEC as much as practicable • Liaise with DSTDM • As much as is practicable continue other tasks associated with the role in accordance with any other • As much as is practicable continue other tasks associated with the role in accordance with any other current Emergency Action current Emergency Action Internal 1. LEC 1. DDO (if available) notifications 2. DSTDM 2. DSTDM 3. SO (if available) 3. SO (if available) External notifications 4. DDMGs 4. LDMGs (if available) 5. DDMGs (if available)

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Table 41: Communications failure—LEC and IC communication plan Activation Trigger for communications Group to contact Method Message text level • Unable to communicate to or from • IC/LEC • Phone Describe current situation with dam communications. Dam site, AND • DSTDM What is the status – estimated time to restore communications? Comms • DDO is at Dam site • SO (if available) Failure – Site • LDMGs • DDMGs IC to send Sunwater Incident and Near Miss Alert EAP Alert Notification—Eungella Dam—Site Communications Failure • Unable to communicate to or from • DDO (if available) • Phone Describe current situation with dam communications. Local Area including LEC and SM • DSTDM What is the status – estimated time to restore communications? Comms • SO (if available) Failure – • LDMGs (if available) Local Area • DDMGs (if available)

IC to send Sunwater Incident and Near Miss Alert EAP Alert Notification—Eungella Dam—Local Area Communications Failure • Unable to communicate to or from • DSTDM (if available) • Phone Describe current situation with dam communications. Sunwater Brisbane • LDMGs What is the status – estimated time to restore communications? Comms • DDMGs Failure – Brisbane LEC to send Sunwater Incident and Near Miss Alert EAP Alert Notification—Sunwater Brisbane Communications Failure

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Table 42: Communications failure—DSTDM emergency action

Activation level Comms Failure – Site Comms Failure – Local Area

Activation trigger • Unable to communicate to Dam site • Unable to communicate to Local Area including LEC and SM

Actions • Provide technical advice to IC/LEC on a needs basis • Provide technical advice to IC on a needs basis • Record all communication • Record all communication • As much as is practicable continue other tasks associated with the role in accordance with any other • Assume that the DDO is assisting IC with LEC role current Emergency Action • As much as is practicable continue other tasks associated with the role in accordance with any other current Emergency Action

Internal 1. IC 1. IC notifications 2. LEC And CEO (if time permits) 2. DDO (if available) And CEO (if time permits)

External 3. DSR 3. DSR notifications

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Table 43: Communications failure—FODM emergency action

Activation level Comms Failure – Site Comms Failure – Local Area

Activation trigger • Unable to communicate to Dam site • Unable to communicate to Local Area including LEC and SM

Actions • Liaise with IC • Liaise with IC • Record all communication • Record all communication • As much as is practicable continue other tasks associated with the role in accordance with any other • Assume that the DDO is assisting IC with LEC role current Emergency Action • As much as is practicable continue other tasks associated with the role in accordance with any other current Emergency Action

Internal 1. IC 1. IC notifications 2. LEC 2. DDO (if available) 3. DSTDM 3. DSTDM External • Not applicable • Not applicable notifications

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Burdekin Falls

APPENDIX A NOTIFICATION AND COMMUNICATION LISTS

A1 Sunwater regional notification list A2 Sunwater Brisbane notification list A3 External notification list A4 D/S Residents notification list A5 Other D/S Residents notification list (outside area—requested messaging) A6 Other reference contacts A7 Emergency alert polygon A8 Dam failure emergency alert request

Appendix A1 to A6 has been redacted

This page current as at 28 September 2020 Page A1

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19°30'0"S BRANDON 19°30'0"S AYR WOODSTOCK BURDEKIN HOME HILL While every care is While every thetaken careto thisensure product, accuracy SunWater no makes of representations or warranties suitability for about any particular purpose its and disclaims all accuracy, responsibility(including without limitation, liability in and negligence) reliability, for all all expenses, losses, damages liability completeness or (including indirect or consequential damage) and costs which you might incur result as of the a product being inaccurate or incomplete in any way and for any reason. SHIRE REID RI VER EK RE C INKERMAN Y AK O K A CREE CLARE R TT VE A HAUG I RR HTON R A B GUMLU MINGELA THREAT GUTHALUNGRA DIRECTION

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1:1,000,000 EK SCALE CK CRE LA 0 10 20 30 40 50 B Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, km CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GISGLENDEN User 147°0'0"E POLICE CRECommunityEK 147°30'0"E 148°0'0"E DRAWN DESIGNED CONTRACT NUMBER IDH BURDEKIN FALLS DAM CHECKED CHECKED EMERGENCY ACTION PLAN DRAWING REV. MB NUMBER APPROVED EMERGENCY ALERT AREA DATE 249570 B 23/01/18 A FORISSUED 23/01/18 USEA 03/09/18 B ALERT 03/09/18 B AMENDEDAREA

M. HUGHES SHEET REVISION  1 OF 1 23/1/2018  DATE JANUARY 2018

Burdekin Falls

: Dam failure emergency alert request Queensland emergency alert request guidelines An Emergency Alert Request form should be completed, if required (see Sections 5 to 10 for actions), and sent to the SDCC Watch Desk to activate the Burdekin Falls Dam Emergency Polygon.

Instructions • This form is not to be used for Flood UNLESS a flood has triggered an emergency event. • Print off the following Queensland Emergency Alert Request form. • Telephone the SDCC Watch Desk on 07 3635 2387 or 0408 190 872 and tell them your intention to use the Emergency Alert for an emergency event for Burdekin Falls Dam. • A KML Polygon for this dam is stored in the Sunwater area of the Disaster Management Portal in the Emergency Alert area. Ask the SDCC operative to locate the polygon. It will be a KML file called Burdekin_Falls_Dam_Emergency_Polygon. • Give them your phone number, confirm their name, and end the call after advising the form will be sent shortly. • IC and DSTDM will work together to craft a message relevant to the hazard and discuss with the LDMG, if there is time. • Fill in the form and send to SDCC watch desk email: [email protected]. This form must come from the IC, DSTDM, or member of the Executive. • Phone back to check the message has been sent and ask for an email to confirm. • Send an internal Incident Alert to advise of completion. • This form MUST be sent from a Sunwater email address. If Sunwater email is not functional, they can confirm identification through the DNRME (Regulator), if required. • Use the following text to complete the emergency alert request:

Filename: Message: SMS:

Burdekin_Falls_Dam_Emerg EMERGENCY EMERGENCY. MESSAGE BURDEKIN MAYOR - BURDEKIN ency_Polygon FROM THE BURDEKIN MAYOR. THE FALLS DAM FAILURE. BURDEKIN FALLS DAM IS FAILING OR IMMEDIATE THREAT TO LIFE EXPECTED TO FAIL. THIS IS AN AND PROPERTY. TAKE ACTION IMMEDIATE THREAT TO LIFE AND AND LEAVE AREA NOW NORTH PROPERTY IN AYR, HOME HILL AND ALL OR SOUTH - LISTEN TO ABC OR SURROUNDING COMMUNITIES. LOCAL RADIO INUNDATION IS EXPECTED THROUGHOUT THE BURDEKIN REGION. WARN NEIGHBOURS AND EVACUATE TO HIGHER GROUND NORTH OR SOUTH NOW. DO NOT DELAY. LISTEN TO THE RADIO AND VISIT COUNCIL WEBSITES.

The following two pages contain a pre-filled Emergency Alert Request form for Burdekin Falls dam:

This page current as at 28 September 2020 Page A12

EMERGENCY ALERT REQUEST Location: Burdekin Falls Dam Date: / / Time: : hrs Requesting Officer: Telephone:

Agency/Position: Email:

Cyclone Storm Surge Flash Flood Flood Event Bushfire Fire Incident Smoke or Toxic Plume Chemical Spill Type Tsunami (NOTE Tsunami EA campaigns will be sent as Location Based Text Message ONLY)

Other (please specify): Catastrophic Dam Failure

Message Severity Emergency Warning (NOTE activates the SEWS) Watch & Act Advice

Campaign Mode Voice SMS – Location Based SMS – Service Address Based

LDMG Advised YES NO DDMG Advised YES NO

Threat Direction Required? YES NO Note: Can only be used for Emergency Warnings. Indicate direction on map

STEP 1. EA Polygon Area: Map attached STEP 2. Filename:

STEP 3. Spatial format: (Indicate the format used) STEP 4. Messaging/spatial data, is it supplied via KML *.kml (preferred format as per Spatial guidelines) DMportal - specify filenames below ESRI *.dbf, *.prj, *.shp, *.shx FTP - specify filenames below GML *.gml, *.xsd Email MapInfo TAB *.dat, *.id, *.map, *.tab Other (please specify) MapInfo Mid/Mif *. MIDI Sequence, *.mif OTHER(insert)

Type (please use capitals for clarity) or handwrite Voice message (Ideally message should be less than 450 characters). EMERGENCY. EMERGENCY. MESSAGE FROM THE BURDEKIN MAYOR. THE BURDEKIN FALLS DAM IS FAILING OR EXPECTED TO FAIL. THIS IS AN IMMEDIATE THREAT TO LIFE AND PROPERTY IN AYR, HOME HILL AND ALL SURROUNDING COMMUNITIES. INUNDATION IS EXPECTED THROUGHOUT THE BURDEKIN REGION. WARN NEIGHBOURS AND EVACUATE TO HIGHER GROUND NORTH OR SOUTH NOW. DO NOT DELAY. LISTEN TO THE RADIO AND VISIT COUNCIL WEBSITES

Type or handwrite SMS below (maximum of 160 characters including spaces) BURDEKIN MAYOR - BURDEKIN FALLS DAM FAILURE. IMMEDIATE THREAT TO LIFE AND PROPERTY. TAKE ACTION AND LEAVE AREA NOW NORTH OR SOUTH - LISTEN TO ABC OR LOCAL RADIO

SEND TO [email protected] and call 07 36352387 TO CONFIRM

FOR USE BY SDCC Requesting Officer: Signature / /20 Manual Transmission EMS Transmission EA User Name: Signature / /20 EA Campaign No. ______Authorising Officer Name: Signature / /20 EMS Report ID: ______

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

F.1.177 EA REQUEST FORM UNCONTROLLED DOCUMENT WHEN PRINTED Page 1 of 2 Version 2.0 UNCLASSIFIED

DO NOT SEND THIS PAGE GUIDE TO COMPLETE STEPS 1 – 4 EA Polygon Area (e.g. detailed description and location reference to allow positive identification of message area, including street names with cross street, areas of interest such as parks, rivers, dams, STEP 1. coastal areas) it is preferable to attach a map identifying the message area. If a Threat Direction has been requested, please clearly indicate it on the map.

STEP 2. Tick applicable box and note the file name.

Voice Message: type or handwritten the required message. As the message will be translated by a text-to-speech process it is important that words are not unintelligible when translated e.g. “qld” used in a web site address must be entered as “q l d”, similarly the word “dot” must be entered into STEP 3. a web address instead of a full stop. Voice Message ideally should have no more than 450 characters including spaces. Do not use special characters – refer to EA Manual for details. Warning message must start with “Emergency Emergency”

SMS Is restricted to a maximum of 160 characters including spaces and punctuation. Either type the STEP 4. message or handwrite the characters into the boxes.

Example: SMS Flash Flood Warning from SES for Opal Valley-immediate threat to life/property-Warn others-Leave area/prepare NOW or seek higher ground-Listen to local radio

If using template EA messages, please provide the appropriate variables that are in the template message guides. Refer to the Queensland Emergency Alert Manual for copies of the template message guides.

//RELEVANTAUTHORITY//

//DIRECTIONANDAREA//

//NAME//

//NUMBER//

//TIME//

//TIMEandDAY//

//DIRECTIONandPLACE//

//HOURSMINUTES//

//PLACE//

//PLACEPLACE//

//EXTERNAL/INTERNAL//

//SUBURBS//

//FireIncident//

F.1.177 EA REQUEST FORM UNCONTROLLED DOCUMENT WHEN PRINTED Page 2 of 2 Version 2.0 UNCLASSIFIED

Burdekin Falls–2020/21–i8.2

APPENDIX B Drawings, maps and emergency control measures

B1 Drawings B2 Flood Impact B3 Inundation maps B4 Locality plan B5 Catchment Area

NOTE: Actual levels may differ from those shown in flood inundation maps due to variations in assumptions made in the models to actual flood events.

Burdekin_Falls_Dam_EAP_I8_2.docx Page B1

Burdekin Falls–2020/21–i8.2

: Flood impact—downstream A Failure Impact Assessment was conducted on the Burdekin Falls Dam by Sunwater in June 2017, HB# 2171383 (Sunwater internal link).

Flood Impact Mapping Figure B3 (next page) indicates Flood Impact Mapping for outflows from Burdekin Falls dam.

Burdekin_Falls_Dam_EAP_I8_2.docx Page B4

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DOWNSTREAM NOTIFICATION AREA 2 t

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: e d m more impacted by other rainfall and inflows that occur e m 1:60,000 t u about its accuracy, reliability, completeness or suitability for c n i o r any particular purpose. downstream of the dam (not shown here). DRAWING No. 250708 B D P CHECK PRINT

Burdekin Falls–2020/21–i8.2

: Inundation maps The following is a complete list of the Inundation maps for Burdekin Falls dam. However due to the space requirements of the large volume of individual maps, only the Keymaps and Overview inundation plans (for illustrative purposes) are presented in the EAP. The individual Inundation maps are available from Sunwater by request. Drawings:

• SDF—Sunny Day Failure: - 250783 Keymap - 250790 Overview - 250785 Maps 1-28

• DCF—Dam Crest Flood: - 250784 Keymap - 250791 Overview - 250786 Maps 1-41

• PMF—Probable Maximum Flood: - 250784 Keymap - 250798 Overview - 250787 Maps 1-41

• PMPDF—Probable Maximum Precipitation Design Flood: - 250784 Keymap - 250799 Overview - 250788 Maps 1-41

Disclaimer: Every effort has been made to ensure the currency of the flood inundation maps reproduced in this EAP. However, as the maps have been extracted from external sources, their accuracy cannot be guaranteed. Please refer to the Local Disaster Management Plan for the most current information.

Burdekin_Falls_Dam_EAP_I8_2.docx Page B6

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REVISION 250790 A

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 NUMBER 

S REFERENCE DRAWINGS  

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 km 1:500,000 APPROVED

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 250791 - Dam Crest Flood (Overview)  R 250784 A       250787 - Probable Maximum Flood (1:50,000 Map Series)    

 250798 - Probable Maximum Flood (Overview) INUNDATION PLANS  03/12/18 A ISSUED FOR USE IDH MGH M.G. HUGHES  SHEET 1 OF 1     

 250788 - Probable Max. Precipitation Design Flood (1:50,000 Map Series)  3/12/2018    DATE REMARKS CKD PSD 250799 - Probable Maximum Precipitation Design Flood (Overview) RPEQ: 18351  KEYMAP DATE NOVEMBER 2018    7,850,000 7,800,000 7,750,000

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7,850,000 7,800,000 7,750,000

REVISION 250791 A

03/12/18 A ISSUED FOR USE IDH MGH REFERENCE DRAWINGS M.G. HUGHES  OVERVIEW INUNDATION PLAN SHEET 1 OF 1 250786 - Dam Crest Flood (1:50,000 Map Series) 3/12/2018 DATE REMARKS CKD PSD RPEQ: 18351  DATE NOVEMBER 2018    7,850,000 7,800,000 7,750,000

R GUTHALUNGRA E IV ER COLLINSVILLE E R RIV PE E D OW N DEVELO ELLIOT REE E T R ELEM B PMENT EY C K I O AL RD FINL E G T M O H LEGEND U B E C SCOTTVILLE R RD Settlements E

E Major Roads K SAN DY CREEK C R U Flood Modelling S H A C TRONG B BOTC R Modelling Limits MS C R E AR RE E

E E EK PMF - No Dam Failure K K K E TABL E E R

PMF - Dam Failure C M

B C

L T A E

E A T T C R

E A E E N R R E

C K K

C E T E E T R R B E K

RE L

A E E C R K E

T E E T

I D A O K K E J C M W R R R

N L C E T O

E E E O C D A E K

R N T K N EE A INKERMAN R L L E I 550,000 K S G 550,000

I E H A C T

C T R I E R R E EK E

B E E K R K K

S C EA I

C C N D HOME HILL G H R O N D O

T C M T S UMTREE CREEK E DALWOO PL R D N D

AYR B C E SA CRE EK U K R

E E R I K

D R E RE K

K C E E K AN K C I N - N I LY BRANDON E K IL R EE B CR DOON R Blue Valley Weir I E E C V E I E K N

K N R E K E E DIN R O G O C B D DALBEG E R D K BEG R IR L O K A C N E D Z

X E MILE E I MILLAROO HT CRE I

E P G E L R E I K R Gorge Weir E D E RE K D P R C C P A GOON CR IT I A A A K I N G Y L E E O R E H N E C R E C NS CREEK K RE LI D P E L A A G O LB Clare Weir S K L C S BU K ENDON C EG LL EE R

C CR R EE JERONA D CLARE R K SPR E LIT E IN TL K G E M CR ILLA C E RO REE E O K K CR

E E

D O

R A 500,000 K LULU CRE 500,000 Y C EK TOR U RE A C K E R R K

E I G EK E F LI E E L G R R A C N R C K R O E C J E A O M K T

D T O O N O RAVENSWOOD Y

C W

R CO

WY E E H N E

L E V E

I C K Y

R E R S A

R K S E R I E D IV R E R

K O K C R R

R E D DI R I E V K E E R WAY SS RIV R RIV ER DR RO ER Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

7,850,000 7,800,000 7,750,000

REVISION 250798 A

03/12/18 A ISSUED FOR USE IDH MGH REFERENCE DRAWINGS M.G. HUGHES  OVERVIEW INUNDATION PLAN SHEET 1 OF 1 250787 - Probable Maximum Flood (1:50,000 Map Series) 3/12/2018 DATE REMARKS CKD PSD RPEQ: 18351  DATE NOVEMBER 2018    7,850,000 7,800,000 7,750,000

R GUTHALUNGRA E IV ER COLLINSVILLE E R RIV PE E D OW N DEVELO ELLIOT REE E T R ELEM B PMENT EY C K I O AL RD FINL E G T M O H LEGEND U B E C SCOTTVILLE R RD Settlements E

E Major Roads K SAN DY CREEK C R U Flood Modelling S H A C TRONG B BOTC R Modelling Limits MS C R E AR RE E

E E EK PMPDF - No Dam Failure K K K E TABL E E R

PMPDF - Dam Failure C M

B C

L T A E

E A T T C R

E A E E N R R E

C K K

C E T E E T R R B E K

RE L

A E E C R K E

T E E T

I D A O K K E J C M W R R R

N L C E T O

E E E O C D A E K

R N T K N EE A INKERMAN R L L E I 550,000 K S G 550,000

I E H A C T

C T R I E R R E EK E

B E E K R K K

S C EA I

C C N D HOME HILL G H R O N D O

T C M T S UMTREE CREEK E DALWOO PL R D N D

AYR B C E SA CRE EK U K R

E E R I K

D R E RE K

K C E E K AN K C I N - N I LY BRANDON E K IL R EE B CR DOON R Blue Valley Weir I E E C V E I E K N

K N R E K E E DIN R O G O C B D DALBEG E R D K BEG R IR L O K A C N E D Z

X E MILE E I MILLAROO HT CRE I

E P G E L R E I K R Gorge Weir E D E RE K D P R C C P A GOON CR IT I A A A K I N G Y L E E O R E H N E C R E C NS CREEK K RE LI D P E L A A G O LB Clare Weir S K L C S BU K ENDON C EG LL EE R

C CR R EE JERONA D CLARE R K SPR E LIT E IN TL K G E M CR ILLA C E RO REE E O K K CR

E E

D O

R A 500,000 K LULU CRE 500,000 Y C EK TOR U RE A C K E R R K

E I G EK E F LI E E L G R R A C N R C K R O E C J E A O M K T

D T O O N O RAVENSWOOD Y

C W

R CO

WY E E H N E

L E V E

I C K Y

R E R S A

R K S E R I E D IV R E R

K O K C R R

R E D DI R I E V K E E R WAY SS RIV R RIV ER DR RO ER Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

7,850,000 7,800,000 7,750,000

REVISION 250799 A REFERENCE DRAWINGS 03/12/18 A ISSUED FOR USE IDH MGH 250788 - Probable Maximum Precipitation Design Flood M.G. HUGHES  DESIGN FLOOD SHEET 1 OF 1 (1:50,000 Map Series) 3/12/2018 DATE REMARKS CKD PSD RPEQ: 18351  OVERVIEW INUNDATION PLAN DATE NOVEMBER 2018    Burdekin Falls–2020/21–i8.2

: Locality plan Figure B4: Burdekin Falls Dam locality plan

Burdekin_Falls_Dam_EAP_I8_2.docx Page B14

Burdekin Falls–2020/21–i8.2

: Catchment area Figure B5: Burdekin Falls Dam declared catchment boundary plan

Burdekin_Falls_Dam_EAP_I8_2.docx Page B15

Burdekin Falls–2020/21–i8.2

APPENDIX C Equipment and technical information

C1 List of equipment available during an emergency C2 Burdekin Falls Dam spillway discharge curve C3 Burdekin Falls Dam storage curve

Burdekin_Falls_Dam_EAP_I8_2.docx Page C1

Burdekin Falls–2020/21–i8.2

: List of equipment available during an emergency Contact Contact Name of equipment No. Owner Depot name number Heavy plant Markwell Townsville Excavator 70T 1 Markwell Townsville Excavator 46T 4 Markwell Townsville Excavator 30T 11 Markwell Townsville Excavator 20T 6 Markwell Townsville Excavator 70T long reach 1 Markwell Townsville Excavator 43T long reach 1 Markwell Townsville Excavator 30T long reach 1 Markwell Townsville Articulated dump trucks 25T 5 Markwell Townsville Grader caterpillar 12H 2 Markwell Townsville Loaders 4 Markwell Townsville Compactors 2 Markwell Townsville Crane Hire Townsville Townsville Crane 220T Cranes Crane 160T Crane 130T Crane 100T Crane 90T Crane 80T Crane 50T Crane 40T Crane 30T Crane 22T Crane 20T Crane 20T franna Crane 16T franna Crane 12T franna Crane 8T Semi-trailer Townsville Townsville 20T low loader Cranes 30T low loader 40T low loader Ford Ranger 4x2 ute 1 Sunwater Burdekin Falls Dam John Deere tractor/loader 1 Sunwater Burdekin Falls Dam Volvo body truck w/hiab 1 Sunwater Clare Depot Caterpillar backhoe 1 Sunwater Clare Depot Caterpillar skid steer 1 Sunwater Clare Depot Generator 5KVa office 1 Sunwater Burdekin Falls Dam Note: In addition to the above list, further resources can be accessed through Local, District, and State Disaster Management framework, if each Local Disaster Management Group is activated. See relevant pages in communication lists for contact details.

Burdekin_Falls_Dam_EAP_I8_2.docx Page C2

Burdekin Falls–2020/21–i8.2

: Burdekin Falls Dam spillway discharge curve Figure C1: Burdekin Falls Spillway discharge curve

Burdekin_Falls_Dam_EAP_I8_2.docx Page C3

Burdekin Falls–2020/21–i8.2

: Burdekin Falls Dam storage curve Figure C2: Burdekin Falls Dam storage curve

Burdekin_Falls_Dam_EAP_I8_2.docx Page C4

Burdekin Falls–2020/21–i8.2

APPENDIX D Burdekin Falls Dam Emergency Action Plan toolkit

Burdekin_Falls_Dam_EAP_I8_2.docx Page D1

Burdekin Falls–2020/21–i8.2

Appendix E Interaction with local government and district groups

Burdekin_Falls_Dam_EAP_I8_2.docx Page E1