LOGAN CITY EXPEDITION ROAD YARRABILBA DETENTION BASIN EMERGENCY ACTION PLAN August 2021 Expedition Road, Yarrabilba Detention Basin - Emergency Action Plan Registered dam ID: 2617 Current as at: 13 July 2021 Approved to: Dam Owner Name: Logan City Council Date: 28 August 2019 Emergency Action Plan Expedition Road, Yarrabilba Detention Basin V1.2 Doc ID: 12891521 Page 2 Document Control Revision Number Description Revision Date Revised By Authorised V1.1 Annual October July 2020 Review V1.2 Annual review and June 2021 re-approval to RDMW Emergency Action Plan Expedition Road, Yarrabilba Detention Basin V1.2 Doc ID: 12891521 Page 3 Issue Register DISTRIBUTION LIST DATE ISSUED NUMBER OF COPIES Lendlease August 2021 01 Chief Executive Officer Logan City Council August 2021 01 150 Wembley Road, Logan Central QLD 4114 Local Disaster Coordinator Logan City Council August 2021 01 150 Wembley Road, Logan Central QLD 4114 Logan City Local Disaster Management Group Logan August 2021 01 City Council 150 Wembley Road, Logan Central QLD 4114 District Disaster Coordinator Queensland Police Service August 2021 - 11 Civic Parade, Logan Central QLD 4114 Duty Officer August 2021 - Queensland Fire and Emergency Services Emergency Services Complex Cnr Park Road and Kedron Park Road, Kedron QLD 4031 Director Community Services Logan City Council August 2021 01 150 Wembley Road, Logan Central QLD 4114 Manager, Parks Logan City Council August 2021 01 150 Wembley Road, Logan Central QLD 4114 Manager, Road Construction Maintenance Logan City August 2021 01 Council 150 Wembley Road, Logan Central QLD 4114 Director, Dam Safety August 2021 - Water Planning and Regulation Department of Regional Development, Manufacturing and Water [email protected] PO Box 15456, City East QLD 4002 Emergency Action Plan Expedition Road, Yarrabilba Detention Basin V1.2 Doc ID: 12891521 Page 4 Approval and Authorisation Acting Chief Executive Officer, Logan City Council Emergency Action Plan Expedition Road, Yarrabilba Detention Basin Vl.2 DoclD:12891521 Page 5 Table of Contents Issue Register ................................................................................................................................................... 4 Approval and Authorisation ............................................................................................................................... 5 Abbreviations and Acronyms ............................................................................................................................. 8 1. Introduction ............................................................................................................................................... 9 1.1. Background ..................................................................................................................................... 9 1.2. Existing Flooding Conditions .......................................................................................................... 11 1.3. Previous Studies............................................................................................................................ 12 1.4. Objectives of this Report ................................................................................................................ 12 1.5. Requirements ................................................................................................................................ 13 2. Dam Information ..................................................................................................................................... 14 3. Dam Location .......................................................................................................................................... 15 4. Dam Owner Responsibilities ................................................................................................................... 16 5. Warning and Communication Plan .......................................................................................................... 17 5.1. Communication Modes .................................................................................................................. 17 5.2. Catchment Flooding Characteristics ............................................................................................... 19 5.3. Notification Listing ......................................................................................................................... 19 5.4. Downstream Affected Properties .................................................................................................... 21 6. Dam Hazard, Dam Hazard Event and Dam Emergency Event ................................................................. 23 7. Training .................................................................................................................................................. 24 8. Operations and Monitoring ...................................................................................................................... 25 8.1. Rainfall Monitoring ......................................................................................................................... 25 8.2. Water Level Gauge and Visual Monitoring ..................................................................................... 25 8.3. Inspections .................................................................................................................................... 26 9. EAP Activation ........................................................................................................................................ 27 9.1. Emergency Management ............................................................................................................... 27 9.2. Event Phases and Warning Times ................................................................................................. 27 9.3. Dam Hazard Event and Emergency Event Escalation Table........................................................... 30 9.4. Terrorist or High Energy Impact ..................................................................................................... 32 10. Emergency Event Report ........................................................................................................................ 33 11. Appendix A Maps .................................................................................................................................... 34 Catchment Map ....................................................................................................................................... 35 85-year ARI Flood Depth Map – Non-breach case ................................................................................... 36 85-year ARI Flood Depth Map - Breach case ........................................................................................... 37 85-year ARI Failure Impact Map - Breach case ........................................................................................ 38 100-year ARI Flood Depth Map - Non-breach case .................................................................................. 39 100-year ARI Flood Depth Map - Breach case ......................................................................................... 40 100-year ARI Failure Impact Map - Breach case ...................................................................................... 41 200-year ARI Flood Depth Map - Non-breach case .................................................................................. 42 200-year ARI Flood Depth Map - Breach case ......................................................................................... 43 200-year ARI Failure Impact Map - Breach case ...................................................................................... 44 500-year ARI Flood Depth Map - Non-breach case .................................................................................. 45 500-year ARI Flood Depth Map - Breach case ......................................................................................... 46 500-year ARI Failure Impact Map - Breach case ...................................................................................... 47 PMF- Flood Depth Map - Non-breach case .............................................................................................. 48 Emergency Action Plan Expedition Road, Yarrabilba Detention Basin V1.2 Doc ID: 12891521 Page 6 PMF- Flood Depth Map - Breach case ..................................................................................................... 49 PMF- Failure Impact Map - Breach case .................................................................................................. 50 85-year ARI Flood Depth Map - Non-breach case .................................................................................... 51 100-year ARI Flood Depth Map - Non-breach case .................................................................................. 52 200-year ARI Flood Depth Map - Non-breach case .................................................................................. 53 500-year ARI Flood Depth Map - Non-breach case .................................................................................. 54 PMF Flood Depth Map - Non-breach case ............................................................................................... 55 List of Tables Table 2-1: Detention Basin Location ...............................................................................................................