Ross River Dam Emergency Action Plan 2021

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Ross River Dam Emergency Action Plan 2021 Ross River Dam Emergency Action Plan 2021 Rural no.: Lot 230 Parish of Ross, County of Elphinstone, City of Townsville o o Location: Lat. - 19.411667 Lon.146.735278 -19o24’42” S 146o44”07”E Note: The Incident Coordinator (IC) is responsible for the decision to activate the EAP. Should the IC be unavailable, the Dam Duty Officer (DDO) is responsible for the decision. Uncontrolled Copy Page 1 of 151 Status: Current Version No: 1.3 Responsible Officer: Team Manager Dam Operations N02632 Next Review Date: 1/09/2022 Townsville Water and Waste RD0031 Ross River Dam Emergency Action Plan 2021 Authorised by: Team Manager Dam Operations N02632 Effective Date: 17/09/2021 Emergency Activation Quick Reference – Dam and Other Hazards This EAP for Ross River Dam covers seven (7) dam hazards and one (1) other hazard evaluated within the Townsville Water and Waste Dam Safety Management Program. Table 1: Emergency Activation Quick Reference Alert Lean Forward Stand Up Stand Down Locally managed (DDO) Locally managed (DDO and IC) Locally managed (DDO and IC) with advice Locally managed (DDO and IC) with advice from from DSTDM DSTDM Dam Hazards Dam Hazard Activation Triggers Flood Operations EL 38.45m and rising (0.1m below FSL) Storage EL 38.65m (gate opening trigger Storage above EL 40.73m Storage FSL 38.55m and falling Refer section 5 level) Chemical Spill/Toxic Reports of contamination or potential Not applicable Confirmation of or highly likely probability of a large Risk assessment that risk has reduced Conditions contamination in the catchment area of amount of chemical spill/toxic conditions found in Confirmation that significant contamination Refer section 6 storage the storage/catchment has not occurred All clear WQ test result Piping: Embankment, Increasing leakage through an Increasing leakage through an Piping condition has been established Risk assessment has determined that Foundation, or embankment, the foundations, or embankment, the foundations, or failure risk has reduced Abutments abutments abutments with cloudy water Refer section 7 Earthquake Earthquake reported or felt at the dam Earthquake reported or felt at the dam or in Earthquake reported or felt in the area, AND Risk assessment has determined that failure Refer section 8 or in the Townsville area, AND the Townsville area, AND A possible failure path has been identified risk has reduced Intensity less than 5 Modified Mercalli Intensity greater than or equal to 5MM, OR (MM) Intensity less than 5MM and change detected during surveillance inspection Terrorist Threat/ Not applicable Not applicable Possible terrorist activity noticed at dam or threat Risk assessment has determined that failure Activity or High Energy received risk has reduced Impact Large explosion heard/observed at dam (e.g., bomb Refer section 9 explosion, aircraft hit) Failure in progress or likely due to impact or explosion Sufficient water in storage to create a dam failure Gate Function Issues Move immediately to Stand-Up Activation Move immediately to Stand-Up Activation Gate function issue Risk assessment that risk has reduced See section 10 Confirmation that all gates are functioning correctly Overturning or Sliding Indications of movement of spillway noted Storage at flood of record, EL 40.73m, OR Obvious displacement of one or more spillway, OR Risk Assessment has determined that sliding of Spillway such as cracking, increased seepage, Increase in movement or seepage Evidence of scouring at or near toe of stilling or over turning risk has reduced Refer section 11 spilling basin area Communication Move immediately to Stand-Up Activation Move immediately to Stand-Up Activation Communication service faults Confirmation that all communication services Failure are functioning correctly Refer section 12 Uncontrolled Copy Page 2 of 151 Status: Current Version No: 1.3 Responsible Officer: Team Manager Dam Operations N02632 Next Review Date: 1/09/2022 Townsville Water and Waste RD0031 Ross River Dam Emergency Action Plan 2021 Authorised by: Team Manager Dam Operations N02632 Effective Date: 17/09/2021 Table of Contents Emergency Activation Quick Reference – Dam and Other Hazards ............................................................................. 2 Table of Contents .......................................................................................................................................................... 3 Revision History ............................................................................................................................................................ 8 Controlled Document Notice ........................................................................................................................................ 8 Controlled Document Distribution List ......................................................................................................................... 8 1. References, Abbreviations and Definitions .............................................................................................. 9 1.1 References/Associated Documents .................................................................................................................... 9 1.2 Abbreviations and Acronyms ............................................................................................................................ 10 2. Introduction................................................................................................................................................ 15 2.1 Context ............................................................................................................................................................. 15 2.2 Purpose ............................................................................................................................................................. 16 2.3 Scope ................................................................................................................................................................ 16 2.4 Training ............................................................................................................................................................. 16 2.5 Dam Emergency Organisation .......................................................................................................................... 17 2.6 Community Information ................................................................................................................................... 18 2.7 Stages of Escalation .......................................................................................................................................... 18 3. Dam Details ................................................................................................................................................ 19 3.1 General Dam Information ................................................................................................................................. 19 3.2 Population at Risk ............................................................................................................................................. 20 3.3 Spillway Adequacy ............................................................................................................................................ 20 3.5 Emergency Inspections and Monitoring ........................................................................................................... 23 4. Roles and Responsibilities ........................................................................................................................... 26 5. Dam Hazard - Flood Operations .................................................................................................................. 29 5.1 Overview ........................................................................................................................................................... 29 5.2 Emergency Actions ........................................................................................................................................... 31 5.3 Manual Operation and Early Releases .............................................................................................................. 32 6. Dam Hazard - Chemical Spill/Toxic Conditions ............................................................................................ 41 6.1 Overview ........................................................................................................................................................... 41 6.2 Emergency Action Roles ................................................................................................................................... 41 7. Dam Hazard—Piping: Embankment, Foundation, or Abutments ................................................................. 47 7.1 Overview ........................................................................................................................................................... 47 7.2 Emergency Action Roles ................................................................................................................................... 47 8. Dam Hazard - Earthquake ........................................................................................................................... 54 8.1 Overview ..........................................................................................................................................................
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