glen niven dam emergency action plandata.dnrm.qld.gov.au/eap/glen-niven-eap.pdf · department...

Department of Energy and Water Supply

Glen Niven Dam Emergency Action Plan

REV 2A November 2017

GLEN NIVEN DAM Emergency Action Plan

Non-Commercial Assets November 2017

Prepared by:

Non-Commercial Assets Department of Energy and Water Supply

© State of Queensland (Department of Energy and Water

Supply) PREPARATION AND AUTHORISATION

Glen Niven Dam Emergency Action Plan Rev.2A November 2017

Page i

Emergency Event - Activation Quick Guide

The Emergency Action Plan (EAP) for Glen Niven Dam covers five emergency conditions.

Use the following table to select the relevant section of the EAP that deals with the emergency condition.

Table 1 - Emergency Event Activation Quick Guide

Activation Status Normal Spillway Discharges

Alert Lean Forward Standup Stand Down

Decision Authority EEC EEC TLNCA & DNCA TLNCA & DNCA TLNCA & DNCA

Activation triggers for emergency conditions relating to uncontrolled dam release hazards (Flooding)

Flooding

(Section 6.1)

Reservoir water level above

EL 879.35m (FSL) and below

EL 879.45m. Nil Action

Reservoir water level above EL

879.45m and rising but below EL

879.75m, noti fication of potential downstream hazards to persons

and/or property.

Council/LDMG advised that

Border Road and Aerodrome

Road may be impacted


879.75m and rising but below EL

880.0m, additional potential downstream hazards to persons

and/or property.

PAR notified.


880.0m (0.3m below

embankment crest) and rising; additional potential downstream

hazards to persons and/or

property.

PAR advised to evacuate

Reservoir water level below

EL 897.45m and falling; no more

risk of damage from downstream hazards to persons or property.

Rainfall in catchment measured at RSAS location

34mm in 15 mins

40mm in 30 mins

55mm in 1 hour

60mm in 1 hour 30 mins

or SDRC Flood Alert

SDRC Flood Alert as per Alert column plus Reservoir water

level above EL 879.75m and

rising rapidly

Water Contamination

(Section 6.3)

Not applicable

Reports of contamination or

potential contamination in the

reservoir and/or catchment area

and potential hazards to RDSWU, persons and/or

property



reservoir and/or catchment area

and potential hazards to RDSWU persons and/or property

Confirmation of or high

probability of significant

contamination in the reservoir or

catchment area and potential hazards to RDSWU persons

and/or property

Risk assessment that risk has

reduced

Confirmation that significant contamination has not

occurred

All clear WQ test result

Activation triggers for emergency conditions relating to dam failure hazards

Structural Concerns

(Section 6.2)

Not applicable

A structural concern has been

identi fied AND

No change detected during

surveillance inspection


identi fied AND

Change detected during surveillance inspection OR

A possible failure path has been

identi fied

Failure in progress or likely,

seepage increasing and/or cloudy

Risk assessment has determined

that fai lure risk has reduced

Earthquake

(Section 6.5)

Not applicable

Earthquake reported or felt in the

area

Intensity less than 5 M/MM AND




area

Intensity greater than or equal to 5 M/MM, OR

Intensity less than 5 M/MM; AND

Change detected OR a possible failure path has been identified


area, and



Risk assessment has determined

that fai lure risk has reduced

Terrorist or High Energy Impact

(Section 6.4)

Not applicable Not applicable Not applicable

Possible terrorist activity/suspicions noticed at the

dam or threat received

Large explosion heard/observed

at dam (e.g. bomb explosion,

aircraft hit) Failure in progress or likely due

to impact or explosion

Risk assessment has determined that fai lure risk has reduced



pg. ii

Table of Contents

Acronym List ..................................................................................................................................... 1

1 Introduction............................................................................................................................ 4

1.1 Dam Owner ........................................................................................................................ 4

1.2 Outline of the Dam .............................................................................................................. 4

1.3 Travel directions to Glen Niven Dam .................................................................................... 4

1.4 Downstream release hazards/ risks and agreed coordinated response ................................... 6

1.5 Activation of the EAP........................................................................................................... 7

1.6 References and Associated Documents ............................................................................... 7

1.7 Other Risks and Issues ....................................................................................................... 7

1.8 Technical Data.................................................................................................................... 8

1.9 Critical reservoir water level triggers ..................................................................................... 9

1.10 Glen Niven Dam - Remote Sensing and Alert System (RSAS) ............................................. 10

1.11 RSAS Redundancy Strategy .............................................................................................. 10

1.12 Bureau of Meteorology ...................................................................................................... 10

2 Uncontrolled Downstream Releases ...................................................................................... 10

3 Downstream Release Hazards .............................................................................................. 11

3.1 Persons............................................................................................................................ 11

3.2 Property ........................................................................................................................... 11

3.3 Road Inundation / Road Closure ........................................................................................ 11

4 Communications .................................................................................................................. 12

4.1 Notifications and warnings ................................................................................................. 12

4.2 Communication Systems ................................................................................................... 12

5 EAP Roles and Responsibilities ............................................................................................ 13

5.1 DEWS as the Dam Owner ................................................................................................. 13

5.1.1 Emergency Event Coordinator (EEC), Non-Commercial Assets, DEWS................................ 13

5.1.2 Dam Inspection Officer (DIO) ............................................................................................. 13

5.1.3 Dam Inspection Engineer (DIE) .......................................................................................... 13

5.1.4 Team Leader, Non-Commercial Assets, DEWS (TLNCA) .................................................... 14

5.1.5 Director, Non-Commercial Assets, DEWS........................................................................... 14

5.1.6 General Manager, Water Supply Policy and Economics, DEWS ........................................... 14

5.1.7 Deputy Director-General, Water Supply Division, DEWS ..................................................... 14

5.1.8 Director-General, DEWS ................................................................................................... 14

5.2 Local Government............................................................................................................. 15

5.2.1 Chairperson, (LDMG) ........................................................................................................ 15

5.2.2 Queensland Police Service ................................................................................................ 15

6 Emergency Events and Action Tables and Communication Tables .......................................... 16

6.1 Flood Events .................................................................................................................... 16

6.1.1 Estimate of Population at Risk (PAR) ................................................................................. 16

6.1.2 Flood Durations ................................................................................................................ 18

6.1.3 Flood Depths .................................................................................................................... 18

6.2 Structural Concerns .......................................................................................................... 29

6.3 Water Contamination......................................................................................................... 38

6.3.1 Contamination in the Reservoir or Catchment ..................................................................... 38



pg. iii

6.3.2 Biological Contamination ................................................................................................... 38

6.3.3 Toxic Inflows into the Reservoir.......................................................................................... 38

6.4 Terrorist or High Energy Impact ......................................................................................... 47

6.5 Earthquake ....................................................................................................................... 56

Appendix 1 - Notification List and Contact Details (checked & updated 5/9/17 by EEC) ........................ 65

DEWS NCA contacts ................................................................................................................... 65

DI Officers (DIO & DIE) ................................................................................................................ 65

Dam Safety Regulator ................................................................................................................. 65

Disaster Management Groups ...................................................................................................... 66

Toxic spill contacts ...................................................................................................................... 66

PAR Contact List – Identified in 1:20,000 AEP Flood Event (Checked by Burst SMS test and updated by EEC 17/8/2017) ...................................................................................................................... 67

Riparian and Downstream Water Users (RDSWU)......................................................................... 68

Appendix 2 - Glen Niven Dam Locality Plan and Access Route .......................................................... 69

Appendix 3 - Glen Niven Dam Catchment Boundary Map .................................................................. 70

Appendix 4 – Inspection Safety Protocol ........................................................................................... 71

Appendix 5 – Potential Problem Identification .................................................................................... 72

Appendix 6 – Weather Monitoring, RSAS, BoM and rainfall duration curves ........................................ 74

Weather monitoring sampling frequencies by EEC......................................................................... 74

Remote Sensing and Alert System (RSAS) ................................................................................... 74

Logging in to the Hydroscot Portal to view storage attributes .......................................................... 74

Automatic SMS alerts .................................................................................................................. 77

The Bureau of Meteorology .......................................................................................................... 77

Accessing and Recording Brisbane Weather Watch Radar data ......................................................... 78

To access 30 minute rainfall totals from 9am..................................................................................... 78

Rainfall depths for lean forward EAP activation ................................................................................. 79

Appendix 7 – Spillway Rating Tables and Flood Duration Curves ....................................................... 80

Dam Volume ............................................................................................................................... 80

Spillway rating curve .................................................................................................................... 80

Appendix 8 – Inundation Mapping .................................................................................................... 83

Sunny Day Failure ....................................................................................................................... 83

5% AEP Flood Failure Inundation (1 in 20 AEP) ............................................................................ 84

0.1% Flood Failure Inundation (1 in 1000 AEP) ............................................................................. 85

0.005% Flood Failure Inundation (1 in 20,000 AEP) ....................................................................... 86

PMP Dam Failure Inundation ....................................................................................................... 87

Appendix 9 – Critical Reservoir Water Levels and Trigger Justification................................................ 88

EAP Activation triggers, discussion and justifications ..................................................................... 88

Individual Activation triggers ......................................................................................................... 88

EAP Triggers, Critical Reservoir Water Levels and Impacted Features/Actions ................................ 89

Appendix 10 – PAR Evacuation Plan ................................................................................................ 90

Appendix 11 – Riparian and Downstream Water Users (RDSWU) Locality Map .................................. 91

Appendix 12 – Burst SMS Sending messages................................................................................... 92

Purpose ...................................................................................................................................... 92

Process ...................................................................................................................................... 92



pg. iv

Sent Message Reporting.............................................................................................................. 95

Appendix 13 – Glen Niven Dam Drawings ........................................................................................ 97

Appendix 14 – Training .................................................................................................................... 98

Appendix 15 – Emergency Event Coordination.................................................................................. 99

Note: Nominated backup will be determined by TLNCA. .................................................................... 99

Appendix 16 – Dam failure emergency alert request .........................................................................100

QFES emergency alert request guidelines ...................................................................................100

Emergency Alert – Polygon text...................................................................................................100

Emergency Alert Request Form...................................................................................................101

Table Index

Table 1 - Emergency Event Activation Quick Guide .............................................................................. i Table 2 - Event Status Colour Coding ................................................................................................. 7 Table 3 - Glen Niven Dam Technical Data .......................................................................................... 8 Table 4 – Estimated Natural Flooding (Non Failure) Persons at Risk (PAR) and properties. ................. 17 Table 5 - Flooding Event - DIO Emergency Action Table.................................................................... 19 Table 6 - Flooding Event - EEC Emergency Action Table................................................................... 20 Table 7 - Flooding Event - TLNCA Emergency Action Table............................................................... 21 Table 8 - Flooding Event - DNCA Emergency Action Table ................................................................ 22 Table 9 - Flood Event - DIO Communication Table ............................................................................ 23 Table 10 - Flood Event - EEC Communication Table ......................................................................... 24 Table 11 - Flooding Event - TLNCA Communication Table................................................................. 26 Table 12 - Flooding Event - DNCA Communication Table .................................................................. 27 Table 13 - Structural Concerns - DIO Emergency Action Table .......................................................... 30 Table 14 - Structural Concerns - EEC Emergency Action Table.......................................................... 31 Table 15 - Structural Concerns - TLNCA Emergency Action Table ..................................................... 32 Table 16 - Structural Concerns - DNCA Emergency Action Table ....................................................... 33 Table 17 - Structural Concerns - DIO Communication Table .............................................................. 34 Table 18 - Structural Concerns - EEC Communication Table ............................................................. 35 Table 19 - Structural Concerns - TLNCA Communication Table ......................................................... 36 Table 20 - Structural Concerns - DNCA Communication Table ........................................................... 37 Table 21 - Water Contamination - DIO Emergency Action Table......................................................... 39 Table 22 - Water Contamination - EEC Emergency Action Table ........................................................ 40 Table 23 - Water Contamination - TLNCA Emergency Action Table.................................................... 41 Table 24 - Water Contamination - DNCA Emergency Action Table ..................................................... 42 Table 25 - Water Contamination - DIO Communication Table ............................................................ 43 Table 26 - Water Contamination - EEC Communication Table............................................................ 44 Table 27 - Water Contamination - TLNCA Communication Table ....................................................... 45 Table 28 - Water Contamination - DNCA Communication Table ......................................................... 46 Table 29 - Terrorist or High Energy Impact - DIO Emergency Action Table ......................................... 48 Table 30 - Terrorist or High Energy Impact - EEC Emergency Action Table ........................................ 49 Table 31 - Terrorist or High Energy Impact - TLNCA Emergency Action Table .................................... 50 Table 32- Terrorist or High Energy Impact - DNCA Emergency Action Table ....................................... 51 Table 33 - Terrorist or High Energy Impact - DIO Communication Table ............................................. 52 Table 34 - Terrorist or High Energy Impact - EEC Communication Table ............................................ 53 Table 35 - Terrorist or High Energy Impact - TLNCA Communication Table ........................................ 54 Table 36 - Terrorist or High Energy Impact - DNCA Communication Table .......................................... 55 Table 37 - Earthquake - DIO Emergency Action Table ....................................................................... 57 Table 38 - Earthquake - EEC Emergency Action Table ...................................................................... 58 Table 39 - Earthquake - TLNCA Emergency Action Table .................................................................. 59 Table 40 - Earthquake - DNCA Emergency Action Table ................................................................... 60 Table 41 - Earthquake - DIO Communication Table ........................................................................... 61 Table 42 - Earthquake - EEC Communication Table .......................................................................... 62 Table 43 - Earthquake - TLNCA Communication Table ...................................................................... 63



pg. v

Figure Index

Figure 1 - Glen Niven Dam Locality Plan............................................................................................. 5 Figure 2 – Dam Embankment Cross Section showing Critical Reservoir Water Level Triggers ............... 9 Figure 3 - Glen Niven Dam Emergency Alert Polygon .......................................................................102



pg. vi

EAP DISTRIBUTION LIST

Copy

Number Position

1 Senior Project Officer, Non Commercial Assets DEWS

2 Team Leader, Non-Commercial Assets DEWS

3 Director, Non-Commercial Assets DEWS

4 Dam Inspection Officer (DIO) SDRC

5 Dam Inspection Officer (DIO) SDRC

6 Dam Inspection Officer (DIO) Backup SDRC

7 Director Dam Safety, DEWS

8 General Manager, Water Supply Policy and Economics, DEWS

9 Deputy Director General, Water Supply Division, DEWS

10 Director General, DEWS

11 Deputy Local Disaster Coordinator, Southern Downs Regional Council, LDMG

12 Local Disaster Coordinator, Southern Downs Regional Council,LDMG

13 Local Disaster Management Coordinator, Southern Downs Regional Council, LDMG

14 State Emergency Service (SES), Stanthorpe

15 Emergency Managament Queensland, Watch Desk

16 State Disaster Coordination Centre Watch Desk Officer

17 QPS - Executive Officer Warwick DDMG

18 QPS – Disaster District Coordinator (DDC)

19 Executive Manager, Queensland Fire and Emergency Services



pg. viii

Document Revision History

Revision No. Date Revision Description

0 December 2015 Draft

1 December 2015 Interim Issue - Emergency Action Plan

1A December 2016 Interim Emergency Action Plan update - PAR contacts

2 May 2017 Full Issue - Emergency Action Plan

2A November 2017 Contact list update and document revision



pg. 1

Acronym List Acronym Full Title Description

AEP Annual Exceedance Probability

Likelihood of an event occurring i.e. 1 in x years

AHD Australian Height Datum Nominated common vertical height Datum for the elevations in this EAP

ANCOLD Australian National

Committee on Large Dams

National organisation providing guidelines on the operation and maintenance of dams

BOM Bureau of Meteorology Government department providing weather data and weather warnings

BURST BURST SMS SMS broadcast service capable of broadcasting previously

prepared messages to previously prepared target groups simultaneously via mobile telephones, with reporting. (Appendix 12)

DDG-WSD Deputy Director-

General, Water Supply Division, DEWS

Deputy Director-General, Water Supply Division for DEWS

DDMG District Disaster Management Group

Assist and enable local government to fulfil their functions under the Disaster Management Act 2003

DDS Director Dam Safety Director Dam Safety for DEWS

DEWS Department of Energy and Water Supply

Queensland Government Department who own Glen Niven Dam

DEWSEM DEWS Emergency Management

Emergency Management section of DEWS

DEWSM DEWS Media Media section responsible for media releases etc., DEWS

DG Director-General, DEWS Director-General of DEWS

DIO Dam Inspection Officer Person appointed to undertake inspections

DIE Dam Inspection Engineer

Engineer appointed to undertake inspections

DLDC Deputy Local Disaster Coordinator

Person nominated under s.35 of the Queensland Disaster

Management Act 2003 as the coordinator of responses in an

emergency event

DNCA Director Non-Commercial Assets

Director for DEWS responsible for Non-Commercial assets

Downstream release

Any downstream release for this dam limited to uncontrolled

releases from spillway or embankment failures only.

EAP Emergency Action Plan The Emergency Action Plan for Glen Niven Dam

Earthquake Intensity

Modified Mercali (MM) 5

or

Magnitude Scale 5

Felt outdoors. Sleepers wakened. Liquids disturbed, some spilled. Small unstable objects displaced or upset. Doors swing. Pictures move. Pendulum clocks stop.

EEC Emergency Event Coordinator

Person responsible for activating the EAP and coordinates emergency actions

EER Emergency Event Report

Document prepared by the TLNCA and sent to the DDS

FSL Full Supply Level Reservoir Water Level reached for reservoir to start spilling

EL Elevation Reduced vertical height elevations (m) with reference to a common datum AHD



pg. 2

Acronym Full Title Description

FIA Failure Impact Assessment

Independent assessment to determine the number of people, population at risk (PAR) should a dam fail.

GM WSP&E Generald Manager,

Water Supply Policy and Economics

General Manager, Water Supply Policy and Economics for DEWS

GSDM Generalised Short-Duration Method

The Generalised Short-Duration Method is appropriate for

durations up to 6 hours, suitable for small catchments such as those of reservoirs and tailings dams anywhere in Australia.

LDC Local Disaster Coordinator

Person nominated under s.35 of the Queensland Disaster

Management Act 2003 as the coordinator of responses in an

emergency event

LDCC Local Disaster Coordination Centre

Centre established in an emergency to manage the response to the emergency

LDMG Local Disaster Management Group

Management group established to manage the response to an emergency event

Message Code Message Code Description of message provided in Activity Table

M/MM Magnitude or Modified Mercali Scale

Description of 5 M/MM:- Felt outdoors. Sleepers wakened.

Liquids disturbed, some spilled. Small unstable objects

displaced or upset. Doors swing. Pictures move. Pendulum clocks stop.

PAR Population at Risk Population exposed to danger as a result of the event leading to the emergency situation

PAR -Nominal Nominal PAR Nominal calculation of total PAR based on assumption of 2.9 persons per house

PMF Possible Maximum Flood

Maximum flood level from the estimated largest possible event.

PMP Possible Maximum Precipitation

Rainfall from the estimated largest possible event.

Polygon SMS Alert Area Polygon SMS alert message broadcast area, administered by the LDMG

QPS Queensland Police Service

Queensland Police Service

RDSWU Riparian and Down Stream Water Users

Persons or property impacted as a result of the event other than PAR.

RPEQ Registered Professional Engineer Queensland

Engineer with qualifications and experience registered to undertake engineering work in Queensland

RSAS Remote Sensing and Alert System

Electronic real time monitoring system that can be accessed remotely and provides alarms

RWL Reservoir Water Level Water level in the Glen Niven Dam Reservoir

SDCC State Disaster Coordination Centre

Coordinates the communications and actions during an event if required

SDRC Southern Downs Regional Council

Glen Niven Dam located in electorate and contracted provider of Dam Inspection Officers (DIO)

SES State Emergency Service

State Emergency Service

SMS Short Message Service Service provided on mobile phones for sending messages

SOP Standard Operating Procedure

Documented procedure for undertaking a defined activity



pg. 3

Acronym Full Title Description

Sunny Day Sunny Day Embankment Failure

Embankment failure and uncontrolled downstream release during a period of nil or low inflow to the reservoir

TLNCA Team Leader, Non-Commercial Assets

Team Leader for DEWS responsible for management of the dam

WQ Water Quality Water Quality



pg. 4

1 Introduction This Emergency Action Plan (EAP) has been prepared to guide the Department of Energy and Water

Supply (DEWS) and relevant entities for events or releases from Glen Niven Dam that compromise the

safety of persons and/or property downstream of the dam. Glen Niven dam is located toward the

head waters of Four Mile Creek approximately 4 kilometers north east of the township of Applethorpe.

Small releases up to 20% Annual Exceedance Probability (AEP) from Glen Niven Dam may have direct

incremental impact on persons and/or property including, downstream property owners and local roads.

Medium releases above 1% AEP will impact residents downstream and require precautionary early

evacuation. Events greater than the 1% AEP have overtopped the embankment crest in the past and are

likely to fail the dam.

This EAP provides an overview of the dam (including technical data), status activation levels and triggers

with respect to the five identified potential emergency conditions and the roles and responsibilities of

officers/entities under each emergency condition. Emergency Action Tables and Communication Tables

for each of the five emergency conditions have been developed for quick reference of actions, including

the priority order for notifications, warnings and evacuations to population at risk (PAR); and event and review reporting.

1.1 Dam Owner

Glen Niven Dam is owned by the state of Queensland and managed by DEWS.

1.2 Outline of the Dam

Glen Niven dam was constructed around the beginning of the 1900s with its exact date of design and

construction unknown. During construction an original low level pipe outlet was installed through the base

of the embankment near the highest point. This outlet is no longer operational and has been

decommissioned.

The dam embankment is believed to be an earth fill embankment with a clay core. The exact design of the dam including the thickness of the dam’s clay core is unknown. There is no evidence of any internal

filters within the dam embankment. The majority of the dam embankment, apart from its clay core has

been constructed from locally obtained silty-sandy clay. This embankment material is typical of that found

throughout the area. This area is known for its granite formations and the embankment material is the

product from the weathering of the granite.

The dam embankment has a narrow crest and relatively steep upstream and downstream embankment

slopes. The dam has previously been overtopped by major flood inflows and some erosion of the dam

crest has occurred. Glen Niven Dam is considered to have a high potential for overtopping in a flood

event and for the embankment to be breached by erosion or the development of a piping failure.

Glen Niven Dam does not have a gated structure or large outlet structure, which would allow upstream

water levels to be lowered quickly if required. Downstream releases are limited to spillway releases

through an uncontrolled open channel or embankment failures. A spillway is located at the right abutment of the dam and consists of a broad crested weir that extends into a wide spillway channel.

There is no formal control structure or sill in the weir. Some minor erosion has taken place in the centre

of the weir. There is no auxiliary spillway or fuse plug spillway on this dam.

The approximate travel time for flow discharging from Glen Niven Dam to reach the nearest PAR is regarded as short (potentially less than 60 minutes), refer to Table 4, however this time would vary

according to the scale of the failure hazard or downstream release hazard event.

1.3 Travel directions to Glen Niven Dam

Glen Niven Dam is approximately 8 km NNE of the township of Stanthorpe on Four Mile Creek, as

indicated on figure 1

Only one access route exists for the dam. Access is gained to the right bank of Glen Niven Dam.

From the township of Stanthorpe travelling north on the New England Hwy for approx. 4.7 km, turn right

briefly on to Border Road, crossing the railway line and turning immediate left onto Old Warwick Road

travel for approximately 4.7km, before turning right onto unnamed dirt road, with a large shade structure

on left, in 120m proceed through the wire swing gate with no entry signage, at the end of the shade



pg. 5

structure turn left to keep it on the left after approx. 550m at the next intersection turn right and proceed

with the fence on your left hand side, the dam right bank and pump sheds are in approx. 200m.

Roads are both sealed and unsealed and are all-weather accessible.

Figure 1 - Glen Niven Dam Locality Plan



pg. 6

1.4 Downstream release hazards/ risks and agreed coordinated response

The Glen Niven Dam Failure Impact Assessment (FIA) (September 2016) undertaken by GHD

determined that:

The dam is assessed to have a Category 1 failure rating and is referable.

There is no identified downstream Population at Risk (PAR) for the Sunny Day Failure Scenario.

There are identified downstream Population at Risk (PAR) of three persons (1 house) for all Flood

Event Scenarios greater than 10% AEP up to 1% AEP.

It is highly likely the storage could fail before the event exceeds 1% AEP.

There are identified downstream Population at Risk (PAR) of up to 15 persons (5 houses) for all

Flood event scenarios greater than 1% AEP up to 0.005% AEP.

There are identified downstream Population at Risk (PAR) of up to 72 persons (24 houses) for all

Flood event scenarios greater than 0.005% AEP up to PMP-DF Failure, including the cascade

failure of Baronio Weir.

The minimum travel time for a flood or change in flow conditions at Glen Niven Dam to impact on

Border Road is approximately 20 minutes and Aerodrome Road 40 minutes.

Other identified downstream risks in smaller flooding events include inundation of Border Road and

Aerodrome Road as soon as Glen Niven dam is full and the uncontrolled spillway release begins.

DEWS and LDC agreed response to flooding events are:

EEC will liaise with DLDC by phone prior to Burst SMS messaging. ALERT status

NOTIFICATIONS at either EL 879.45m, when Glen Niven Dam spillway depth exceeds 0.1m or if

the rainfall intensity exceeds 40mm in 30 minutes, DLDC will assess the need to close Border Road and Aerodrome Road;

EEC will liaise with DLDC by phone prior to Burst SMS messaging. EEC will distribute Burst SMS

messaging LEAN FOWARD Status NOTIFICATION updates to DLDC and commence Burst SMS messaging LEAN FOWARD status NOTIFICATIONS to PAR and RDSWU at, EL 879.75m, when

spillway depth exceeds 0.4m and there is potential to reach EL 880.3m.

EEC will liaise with DLDC by phone prior to distributing Burst SMS messaging STAND UP status

WARNINGS to DLDC, RDSWU and PAR, recommending evacuation at, EL 880.00m, spillway depth exceeds 0.65m and there is potential to reach EL880.3m.

EEC will liaise with DLDC by phone prior to requesting ‘Dam Failure Likely’ POLYGON

EMERGENCY alert at EL 880.30m, dam crest level.

EEC will liaise with DLDC by phone prior to distributing update message by Burst SMS

recommending Stand Down to DLDC, DIO, RDSWU and PAR when a receding RWL trend is

observed and no additional rain in the catchment and reservoir water level is less than EL 880.00m and falling.

It has been agreed with the LDMG and DLDC that co-ordination for the evacuation of the population at

risk (PAR) would be carried out, where possible, by the SES and/or QPS and coordinated through the

LDMG. This aligns with the Local Disaster Management Plan and/or sub plan. Therefore, DEWS must

communicate effectively with the DLDC at all times, from start to finish of any event.

Other downstream simultaneous release hazards exist for Glen Niven Dam at the Alert status in priority

order which include:

Border Road and Aerodrome Roads may be inundated and the LDMG/Council should consider

closure;

Fencing, pumps and stock;

Internal property access roads may be impacted;

The following colour coding has been used in this EAP to correspond to each status/level of EAP

activation:



pg. 7

Table 2 - Event Status Colour Coding

1.5 Activation of the EAP

This EAP will be activated by the Emergency Event Coordinator (EEC) (Refer section 5.1.1) when the

event reaches or exceeds the ALERT status, except in the event of a terrorist threat or event which goes straight to STANDUP.

1.6 References and Associated Documents

The following list of references, including relevant legislation and key documentation applicable to this

EAP.

Water Supply (Safety and Reliability) Act 2008.

Disaster Management Act 2003.

Queensland Dam Safety Management Guidelines February 2002.

ANCOLD Guidelines.

DEWS Provisional EAP Guidelines

IGEM Review of Seqwater and SunWater Warnings Communications Report 1: 2015-16

Report for Glen Niven Dam, Failure Impact Assessment (FIA), September 2016.

1.7 Other Risks and Issues

The weather event(s) likely to lead to activation of this EAP may also have the following implications:

Access roads to the dam may be impassable due to localised flooding, slippery road

conditions, downed power lines and trees or vegetation across the roads;

High winds making road travel difficult or unsafe;

The embankment will not be assessable while there is a flow in the spillway above EL

879.45m. Do not attempt to cross the spillway above this level.

Dam DIO’s unable to travel to dam site due to road closures;

Emergency services already occupied with other storm event related issues;

Limited number of resources available within Applethorpe and surrounding area to assist

with implementation of the EAP;

Potential communication issues.

The Remote Sensing and Alert System (RSAS) has been installed as the control measure to address

the above risks, allowing critical readings at the dam to be monitored remotely in real time. The

monitoring system at Glen Niven Dam relies on a telemetry system that utilises both the mobile and

satellite phone network. Adverse weather conditions or storm damage to either phone network or onsite equipment (such as from a lightning strike), temporary high demand or high cloud cover may

impact on the systems connectivity and updates.

DIO’s are to cease all routine weekly inspections of the dams once the flooding activation status

reaches or exceeds (or is likely to exceed) the Lean Forward status. The DIOs are only to go to

the site while the EAP remains above Lean Forward if requested or approved by the EEC, and if it

is safe to do so.

ALERT LEAN FORWARD STAND UP STAND DOWN



pg. 8

1.8 Technical Data

The following technical data is provided for Glen Niven Dam:

Table 3 - Glen Niven Dam Technical Data

Name and location

Council Southern Downs Regional Council (SDRC)

Nearest Town Applethorpe, 3km, South West

Stream and AMTD Four Mile Creek, AMTD 6.5km

Referable Dam Number Dam ID 276

Embankment Coordinates 280 35’ 40.999”S 1510 58’ 18.001”E

Current Owner Queensland Government (managed by Department of Energy and Water Supply)

Designer (Date)

Designer of Upgrade (20**)

1900

N/A

Construction Contractor of Upgrade N/A

Construction Period

Construction of Upgrade

1900

N/A

Dam Safety review dates None to date

Technical data

Dam Type Unknown, assume homogenous earth fill embankment.

Purpose Water supply for irrigation and stock.

Main Dam Height (above lowest toe) 7m

Main Dam Length 260m

Primary Spillway Type Natural bed-rock and soil chute, Spillway Crest 879.35m.

Primary Spillway Description Spillway width approximately 28 m

Outlet Description Decommissioned

Reservoir characteristics

Full supply level (FSL) EL 879.35m

Reservoir capacity 170 ML

Surface area 9ha at FSL

Length of shoreline unknown

Main Spillway capacity 29m3/s at Dam Crest level

Dam crest level (DCL) 880.31m (AHD)

Catchment area 8.1km2

Estimated time of concentration Approximately 1.5 hours

Catchment description Low undulating hills with flat land, sparsely vegetated.

Design Rainfall Review

Methods

Rainfall estimates for rare floods between the 1 in 100 and 1

in 2,000 AEPs were made using the NRW Rainfall program

(2005) which is based on the CRC-Forge technique. Rainfall estimates were made for short-duration Probable Maximum

Precipitation (PMP) storms using the generalised short

duration method (BOM, 2003). Rainfall intensities between 1

in 2,000 AEP and the PMP were interpolated using methods

prescribed in AR&R (1999).

Dam characteristics

Wall Description (dimensions and

zone arrangements)

2 m wide crest with 1 on 2 upstream slope and 1 on 2 downstream slope. The wall is a homogenous earth-fill with

cobbles and grasses for slope protection.

Slope Protection Rock on the upstream face. Grass and shrubs on the

downstream face.



pg. 9

1.9 Critical reservoir water level triggers

Figure 2 – Dam Embankment Cross Section showing Critical Reservoir Water

Level Triggers

EL 879.35m



pg. 10

1.10 Glen Niven Dam - Remote Sensing and Alert System (RSAS)

The RSAS at Glen Niven Dam provides real time monitoring at preset time intervals of the conditions

listed below. Automatically activated SMS alerts are sent to key DEWS personnel at predetermined

critical trigger water levels:

upstream reservoir water levels; various alert levels set

rainfall tipping bucket measuring rainfall intensity of 40mm or more in a 30 minute period

The system uses the local mobile system (Next G) and satellite to communicate the site data to

Hydroscot and other users.

The RSAS and the site instruments are powered by batteries which are electrically maintained by

solar panels located on the top of each cabinet. The systems are capable of operating for several

days with minimal charge, however may be impacted by extensive periods of cloud cover or wet weather reducing the efficiency of the solar panels and the level of charge in the batteries. A

persistent low battery voltage reading on the portal website may pre-empt a detrimental impact to

the system.

Details on the use of the RSAS portal website are in Appendix 7.

1.11 RSAS Redundancy Strategy

In the situation the real time RSAS fails the redundant strategy is to revert to relying upon local intelligence and BOM to provide weather conditions, predictive rainfall depths and intensities likely for

the dam. See Glen Niven Dam Rainfall Duration Curves graph, Appendix 6.

1.12 Bureau of Meteorology

A large amount of real time information can be obtained from the Bureau of Meteorology (BOM) web

site (www.bom.gov.au) that can assist in assessing actual and predicted rainfall and development of

flood inflows to Glen Niven Dam. The information includes “weather radar” images from either

Marburg, Mt Stapylton or Moree Weather Watch Radars and localised surrounding rainfall weather

stations.

Details of the use of BOM site to assist in assessing impacts to the dam are in

Appendix 6.

This information should be used to verify the veracity of the RSAS data.

2 Uncontrolled Downstream Releases Glen Niven Dam has no ability to control releases from the dam (for example outlet pipes or gated

structures), all releases pass through the spillways only and are therefore uncontrolled.

http://www.bom.gov.au/



pg. 11

3 Downstream Release Hazards

3.1 Persons

Flooding downstream of Glen Niven Dam does not impact on residential properties until discharges

are in the order of a 10% AEP event.

All flooding events in excess of 1:10 AEP have the potential to fail the embankment and have a direct

impact on downstream properties. These impacted persons are identified in this EAP as the

Population at Risk (PAR). Impacts will include above ground flooding around houses at various

depths and the requirement for evacuation. Evacuation of the PAR is initiated earlier at the 1:10 AEP.

The notifiable PAR are identified on the evacuation plans, the numbers on the plans are the property

numbers (not street addresses) and directly correspond with PAR list and contact details. Property 1

has an additional 5 evacuation plans in different languages to cater for potential ethnicity of residents.

(Refer to Appendix 1, PAR within Inundation area as identified in the 1:20,000AEP event and

Appendix 10, PAR Evacuation Groups and Evacuation Routes.)

3.2 Property

Events may impact properties surrounding and downstream of the dam other than the identified PAR.

The landholders associated with these properties have been identified in this EAP as the Riparian and

Downstream Water Users (RDSWU). Impacts may include but are not limited to internal access, grazing activities, fences, stock and pumps. The RDSWU are therefore included in all simulcast

broadcast messaging.

3.3 Road Inundation / Road Closure

The two culvert road crossings on Border Road and Aerodrome Road located just downstream Glen

Niven dam may be inundated whenever there is any release from Glen Niven Dam. SDRC and DLDC

will be notified of uncontrolled releases and advised the roads may require closing. Large and/or long

duration releases may cause damage to Border Road and Aerodrome Roads which should be

assessed by SDRC after each event.

A proactive approach is encouraged in respect to road closures. Warning signs should be erected

ahead of any adverse weather systems approaching the area. The SDRC should liaise with the relevant

entities to assist with road closures and the placement of signage and barricades.

Refer to Appendix 9 Critical Water Levels and Trigger Justification, Figure 1 Glen Niven dam locality map, Appendix 1 for RDSWU Contact List and Appendix 11 for RDSRU Locality Map.



pg. 12

4 Communications

4.1 Notifications and warnings

The process for issuing notifications and warnings is outlined in the Emergency Action Tables and Communication Tables in Chapter 6 in this EAP.

Particular attention should be made to the listed order in these tables, being the notification priority order in which individuals or organisations are to be notified as the order can vary for different Emergency Events and for different Activation Status’s within events.

Flooding in Four Mile Creek and discharges from Glen Niven Dam are expected as a result of a large

low, rain depressions or thunderstorms entering the area. The Emergency Action Tables in this EAP provide an indication of identifying triggers and indicate when notifications and warnings from the

Communication Tables need to be distributed. It is however noted that for other reasons initial

warnings and evacuation of impacted residents at an earlier stage than that outlined in this EAP may

have occurred (i.e. other local emergency plans have been activated, for example the Local Disaster

Management Plan held by SDRC or for other reasons Queensland Police Services (QPS) initiate

evacuation of impacted residents (PAR) at an earlier stage than that outlined in this EAP. A proactive response and early notification, warning and/or evacuation is encouraged, rather than waiting for

reservoir water triggers to be reached.

If a dam is likely to fail or failure is already in progress, DEWS will inform the LDMG and DLDC

immediately. DEWS will prepare for appropriate dissemination of emergency alert warnings (see Appendix 16) in consultation with the SDCC. The LDMG have informed DEWS that in an emergency

situation where evacuations are necessary, the LDMG and SES will door knock the potentially

impacted houses and evacuate people to the Stanthorpe Civic Centre or other evacuation centres

nominated under the LDMP sub plan.

4.2 Communication Systems

Communications includes both communication to the public (PAR, RDSWU and other dam users) as well

as communications between DEWS (EEC), DIO and the relevant emergency response entities required

to deliver the appropriate response, scalable to the emergency event.

The listed order in the Emergency Action Tables and Communication Tables is the intended priority

order. However, the primary communication mode “Burst” is capable of broadcasting SMS messages to

target groups simultaneously via mobile telephones, and provide instantaneous details on delivery

success or failure.

The means of communication to be engaged for this EAP in priority order includes:-

Communication with PAR and RDSWU from EEC

Burst SMS messaging, primary communication mode (Appendix 12);

Landline Telephone, secondary communication mode;

Mobile Telephone, secondary communication mode;

Social media, Facebook and external website.



pg. 13

5 EAP Roles and Responsibilities

5.1 DEWS as the Dam Owner

DEWS acts on behalf of the State Government as the owner of Glen Niven Dam. The dam owner is responsible for preparing a regulator approved the EAP under the Water Supply (Safety and Reliability)

Act 2008. DEWS has a contract with SDRC to deliver certain functions under this EAP on its behalf as

outlined below.

5.1.1 Emergency Event Coordinator (EEC), Non-Commercial Assets, DEWS

The EEC is the NCA officer who is responsible for coordinating an emergency event and activating the

EAP. Refer to Appendix 15 – Emergency Event Coordination.

During an event the EEC shall:-

Activate the EAP as per section 1.4;

Advise Team Leader, Non Commercial Assets (TLNCA) that EEC is coordinating the response to

the event; and confirm that the EAP is activated in response to an event;

Record details of the emergency event in the Event Log. This shall include details of all

communications received and sent, observations, decisions and actions taken;

Monitor conditions at Glen Niven Dam using a combination of information from the

RSAS web site and BOM web site;

Notify SDRC DLDC that Glen Niven Dam is spilling and downstream roads Border Road and

Aerodrome Road may be affected;

Monitor all emergency events;

When an event at Glen Niven Dam has reached or is likely to reach a reservoir safety trigger

level make notifications as per Emergency Action Tables and Communication Tables 5 to 44

In the event that this EAP is activated undertake actions required as per Emergency Action

Tables and Communication Tables 5 to 44

Maintain the DEWS social media notifications and warnings on Facebook and DEWS external website if applicable.

Refer high risk activities to the TLNCA, as appropriate and/or as per Departmental policy;

Provide regular updates during emergency events to DLDC;

Provide technical assistance and information to the DLDC as necessary to assist in the

implementation of this EAP;

Within thirty (30) working days of an event, investigate and present an Emergency Event

Report to the TLNCA, if required

5.1.2 Dam Inspection Officer (DIO)

The nominated or duty EAP Officer (DIO) shall undertake the following:

Undertake a special inspection of the dam if requested by EEC. If safe.

5.1.3 Dam Inspection Engineer (DIE)

If directed by the EEC to undertake a special inspection of the dam. Provide a verbal update in the first

instance, followed up by comprehensive report including observations and photographs.



pg. 14

5.1.4 Team Leader, Non-Commercial Assets, DEWS (TLNCA)

The Team Leader, Non-Commercial Assets, DEWS shall undertake the following:

Annually

Review the EAP by 1 September each year;

Check that the disaster management entities are conversant with the EAP;

Establish and maintain the SMS Alert Area Polygon when mobile coverage is available and;

Distribute the EAP and any amendments / updates according to the Distribution List.

During an Event

Monitor conditions at Glen Niven Dam using a combination of reports from the RSAS web site and

BOM web site;

Verify the veracity of the information from the EEC;

Confirm that this EAP is implemented in response to an event at Glen Niven Dam;

In the event that this EAP is activated, provide technical assistance and information to the LDMG

as necessary to assist in the implementation of this EAP;

Make notifications and SitReps as per tables 5 to 44;

Refer high risk activities to the DNCA, as appropriate and/or as per Departmental policy;

Maintain an Event Log of all communications received and sent, observations and actions taken;

Within thirty (30) working days of an event, investigate and present an Emergency Event Report to

the DDS if required;

5.1.5 Director, Non-Commercial Assets, DEWS

The DNCA, DEWS shall undertake the following:-

Review the EAP in consultation with the TLNCA by 1 September each year;

Endorses this EAP;

Initiate a review as and when there are changes to the operating environment or

assessed risk;

Review event reports and notify as per Emergency Action Tables and Communication Tables

5 to 44

Provide advice and/or assistance to the TLNCA and back up TLNCA as required;

Direct actions of Departmental Personnel during an emergency to protect life and property to

the maximum extent considered possible under the prevailing conditions and with the

resources available;

Approve repairs and procurement for the emergency event and subsequent repairs or

remediation; and

5.1.6 General Manager, Water Supply Policy and Economics, DEWS

The General Manager, Water Supply Policy and Ecomonics, DEWS shall undertake the following:-

Review event reports and notify DDG.

5.1.7 Deputy Director-General, Water Supply Division, DEWS

The Deputy Director-General, DEWS shall undertake the following:-

Review event reports and notify DG.

5.1.8 Director-General, DEWS

The Director-General, DEWS shall undertake the following:-

Review event reports and keep Minister informed; and

Obtain emergency funding when required.



pg. 15

5.2 Local Government

The local government has responsibilities related to this EAP under the Local Government Act 2009 and

the Disaster Management Act 2003.

5.2.1 Chairperson, (LDMG)

The Chairperson, Local Disaster Management Group (LDMG), shall undertake the following actions :-

Responsible for preparing a local disaster management plan for Southern Downs Regional

Council, with the assistance of the Southern Downs Regional Council local disaster management

group including arrangements for public information and warnings;

Coordinating community education activities, including information on warnings;

Having a disaster response capability available for Southern Downs Regional Council, including the establishment and convening of the LDMG and resourcing of the Local District Coordination

Centre (LDCC); and

Performing other functions given to local government under the Disaster Management Act 2003.

Annually

ensuring disaster management and disaster operations in the area are consistent with the state

group’s strategic policy framework for disaster management for the state;

Developing effective disaster management with Southern Downs Regional Council, and regularly

reviewing and assessing the disaster management;

Identifying and providing advice to the Southern Downs Regional Council Local Disaster

Management Group (SDRC LDMG); about support services required to facilitate disaster

management and disaster operations as required for an event;

Ensuring the community is aware of ways to mitigate adverse effects of an event;

During an Event

Ensuring information about a disaster in the area is promptly given to the Southern Downs Local

Disaster Management Group

Issue of all media releases and responses to media communications. Liaise with Queensland

Police and other agencies as necessary on wording of media releases.

5.2.2 Queensland Police Service

The QPS has responsibilities related to this EAP under the Disaster Management Act 2003.

The Queensland Police Communications Centre shall respond to notification of terrorist threat or activity.

The QPS will coordinate its resources and responses as required for terrorist threat or activity. The QPS

is part of the SDRC LDMG and all messaging and responses shall be coordinated through the LDMG so

there is no breakdown in communication, particularly during evacuation activities.

The QPS also has responsibilities with regard to evacuations.



pg. 16

6 Emergency Events and Action Tables and Communication Tables In a flood and dam safety emergency situation, all persons involved in activation, management and

implementation of this EAP are to note the following:-

Weather situations likely to lead to implementation of this EAP are also likely to see intense

rainfall conditions elsewhere in the area. This will increase the hazards and risks associated

with implementing this plan. Hazards may include dangerous road conditions, reduced

visibility, flooding of local roads, downed power lines and trees being blown over;

Resources required to respond to a dam safety event at Glen Niven Dam and Applethorpe

may be limited due to these resources being deployed elsewhere in the region as a result of

the wet weather event (downed trees, house roof damage etc.), and the limited number of

resources available locally.

Under this EAP the following scenarios / situations are provided as a guide to the possible dam safety

events and emergency situations associated with Glen Niven Dam:-

Flood Events – Section 6.1

Structural Issues – Section 6.2

Water Contamination – Section 6.3

Terrorist or High Energy Impact – Section 6.4

Earthquake/Sunny day Failure – Section 6.5

6.1 Flood Events

6.1.1 Estimate of Population at Risk (PAR)

The following table summarizes the PAR as a guide to the possible number of persons at risk. It also includes estimates of travel time for water discharging from Glen Niven Dam to reach the PAR and

peak inundation times. It should be noted that the events for this EAP are modelled on occurrences in

Four Mile Creek only and does not include any concurrent flooding from the catchment downstream of

Glen Niven Dam.



pg. 17

Table 4 – Estimated Natural Flooding (Non Failure) Persons at Risk (PAR) and properties.

Flood Event Event

Description

Total Natural Flooding PAR

(number of

properties)

Approximate times to peak

flood impact (see

6.1.2 below)1

Time of

Inundation Flood Event

Map Included

Map Included

EAP - PAR

(Natural Flood)

FIA - PAR

(Incremental)

Sunny Day

Failure 0 (0) 150 4 to 6 hours SDF Y Y

10% AEP Dam Crest Flood 0 (0) 100 4 to 6 hours 1 in 10 N Y (67)

5% AEP Dam breach 2.9 (1) 90 4 to 6 hours 1 in 20 Y (1) Y

2% AEP Dam breach 2.9 (1) 80 4 to 6 hours 1 in 50 N (1) Y (13, 66)

1% AEP Dam breach 2.9 (1) 80 4 to 6 hours 1 in 100 N (1) Y (13,66)

0.1% AEP Dam breach 5.8 (2) 70 4 to 6 hours 1 in 1000 Y (2) Y

0.05% AEP Dam breach 8.7 (3) 60 4 to 6 hours 1 in 2000 N (3) Y

0.005% AEP Dam breach 14.5 (5) 50 4 to 6 hours 1 in 20000 Y (5) Y (69)

PMP Design Flood

Dam breach 69.6 (24) 40 4 to 6 hours PMP DF Y (24) Y (79)

Note 1: The approximate times to peak in minutes is a nominal estimate that is assuming start time (T=0 minutes) is when a sudden change in flow condition commences. Harmful flooding could already be experienced at a location of interest prior to these approximate time estimates.

Glen Niven Dam does not have any outlet works other than the spillway. There are no facilities available to lower the water level in Glen Niven Dam other than by providing pumps.



pg. 18

6.1.2 Flood Durations

Lead time from the start of the event to when dam failure threat is detected (Alert > Stand up) – 45

minutes. The travel time for a flood wave or change in flow conditions at Glen Niven Dam to impact on

the PAR is approximately 40 minutes to Border Road and 1.0 hour to Aerodrome Road. A high level of

flooding for a duration of at least 4.0 hours can be expected.

6.1.3 Flood Depths

Refer to Appendix 8 for estimated Flood Failure Inundation Mapping for various flood events.



pg. 19

Table 5 - Flooding Event - DIO Emergency Action Table

Activation Status Normal Spillway Discharges Alert Lean Forward Stand Up Stand Down

Activation Trigger Reservoir water level above EL 879.35m

Reservoir water level above EL 879.45m

and rising. Rainfall in

catchment;

34mm in 15 mins

40mm in 30 mins

55mm in 1 hour

60mm in 1 hour 30

mins

or

SDRC Flood Alert


879.75m and rising


and rising. SDRC

Flood Alert as per

Alert column plus


and rising rapidly

Reservoir water level below EL 880.00m and

falling

Actions Undertake Special

Inspections if requested by EEC

As per previous

activation status

As per previous

activation status

As per previous

activation status

As per previous

activation status

Notifications EEC EEC EEC EEC EEC

NB:- Undertake Risk Assessment before considering action.



pg. 20

Table 6 - Flooding Event - EEC Emergency Action Table

Activation

Status

Normal Spillway Discharges Alert Lean Forward Stand Up Stand Down

Activation

Trigger


(FSL) EL 879.35m

Reservoir water level

above EL 879.45m and

rising. Rainfall in

catchment;

34mm in 15 mins

40mm in 30 mins

55mm in 1 hour


or

SDRC Flood Alert.


above EL 879.75m

and rising.


880.00m and rising or SDRC

Flood Alert as per Alert column

plus Reservoir water level above EL 879.75m and rising

rapidly.

Reservoir water level below

EL 880.00m and falling.

Actions Notify DLDC, Glen Niven

Dam is spilling and the

downstream causeway may

be flooded.

Monitor RSAS and BOM as

per Appendix 6

Advise SDRC to monitor

Border and Aerodrome

Roads.

As per previous status,

plus

Activate EAP

Notify of EAP Activation

Notify DLDC

Notify PAR/RDSWU

(Where needed. See Appendix 9)

Notify TLNCA

Record data of the event

and maintain an event

log of all actions and

communications

As per previous

activation status,

plus

Phone DLDC

Notify of EAP

Escalation

Notify DLDC.

Notify PAR.

Notify RDSWU.

Notify TLNCA.

As per previous activation

status, plus.

Phone DLDC

Notify of status Escalation

send BURST WARNING to

PAR to EVACUATE.

Notify police Communication

Centre in Warwick.

Updates to DLDC,PAR

RDSWU and TLNCA

‘Dam Failure Likely’ Polygon

Emergency Alert at

EL880.30m.

Phone DLDC

Notify of EAP Stand Down

Send BURST STAND

DOWN

Notify DLDC

Notify PAR

Notify RDSWU

Notify TLNCA

Notify DNCA

, Prepare and forward

EER2 to TLNCA to forward

to DDS within 30 working

days if the RWL exceeds

880.00m.

Notifications

and Warnings DLDC DLDC

PAR

RDSWU

TLNCA

DLDC

PAR

RDSWU

TLNCA

DLDC

Police

PAR

RDSWU

TLNCA

Provide warning update

DLDC

PAR

RDSWU

TLNCA

NB:- Undertake Risk Assessment before considering action. 2Emergency Event Report (EER) to TLNCA within 30 business days of the event if stand up is reached, as specified in the Water Supply (Safety and Reliability) Act 2008



pg. 21

Table 7 - Flooding Event - TLNCA Emergency Action Table

Activation

Status

Normal Spillway Discharges Alert Lean Forward Stand Up Stand Down

Activation

Trigger


(FSL) EL 879.35m


EL 879.45m and rising


above EL 879.75m

and rising




below EL 880.00m and

falling

Actions None Notify DNCA of EAP

Activation with SitReps

Notify DDS1 of EAP

activation

Notify DNCA of

status Escalation

with SitReps

Notify DDS of EAP

status Escalation

Notify DNCA of status

Escalation with SitReps

Notify DDS of EAP status

Escalation

Notify DNCA of EAP

Stand Down with SitRep

Notify DDS of EAP Stand

Down

Prepare and forward

EER2 to DDS2 to within

30 working days if the Reservoir water level

exceeds 880.00m

Notifications

and Warnings None DNCA

DDS1

DNCA

DDS1

DNCA

DDS1

DNCA DDS1&2

1 Notify DDS within 48 hours of event, 2Forward Emergency Event Report (EER) to DDS within 30 working days of the event as specified in the Water Supply (Safety and Reliability) Act 2008



pg. 22

Table 8 - Flooding Event - DNCA Emergency Action Table

Activation Status Normal Spillway Discharges Alert Lean Forward Stand Up Stand Down

Activation Trigger Reservoir water level above

(FSL) EL 879.35m





rising



rising



falling

Actions None Notify of EAP Activation

with SitReps

DDG-WSD

DG

GM WSP&E

DEWSEM

DEWSM

Notify of EAP


DDG-WSD

DG

GM WSP&E

DEWSEM DEWSM

Notify of EAP Escalation

with SitReps

DDG-WSD

DG

GM WSP&E

DEWSEM

DEWSM

Notify of EAP Stand

Down with SitRep

DDG-WSD

DG

GM WSP&E

DEWSEM

DEWSM

Notifications and

Warnings None DDG-WSD

DG

GM WSP&E

DEWSEM

DEWSM

DDG-WSD

DG

GM WSP&E

DEWSEM

DEWSM

DDG-WSD

DG

GM WSP&E

DEWSEM

DEWSM

DDG-WSD

DG

GM WSP&E

DEWSEM

DEWSM



pg. 23

Table 9 - Flood Event - DIO Communication Table

Activation Status Trigger for

Communications

Contact Groups

(in Priority Order)

Method Message

Code

Message Text

N/A Request from EEC for

special inspection

EEC Phone N/A N/A



pg. 24

Table 10 - Flood Event - EEC Communication Table


Communications

Contact Groups

(in Priority Order)

Method Message Code Message Text

Normal Spillway

Discharges


above (FSL) EL

879.35m

Updates from RSAS and

BoM

DLDC/SDRC SMS/

Email

Glen Niven Flood DEWS NOTIFICATION

DAM: Glen Niven

EVENT : Flooding

STATUS : Normal Spillway Discharge – Reservoir Water Level: EL

879.35m and rising/steady/falling ACTION: Advise SDRC to monitor Border and Aerodrome Roads;

may be affected

UPDATE: Next update due by XX am/pm

Alert


above


Updates from RSAS and BoM

DLDC Phone first

then BURST

Glen Niven Flood

Alert

DEWS Emergency NOTIFICATION

DAM: Glen Niven

EVENT : Flooding

STATUS : ALERT – EAP Activated, Reservoir Water Level EL 879.45m and rising/steady, Critical Level EL 880.00m, houses are

not at risk

ACTION: Standby for further notifications


RDSWU BURST

TLNCA BURST

Lean Forward



rising Updates from RSAS and

BoM

DLDC Phone first

then BURST

Glen Niven Flood

Lean Forward


DAM: Glen Niven

EVENT : Flooding STATUS : LEAN FORWARD - Reservoir Water Level EL 879.75m

and rising/steady, Critical Level EL 880.00m, PAR notified

ACTION: Prepare for evacuation now, refer to evacuation plan,

await further notifications or self-evacuate at early at signs of

increased flooding UPDATE: Next update due by XX am/pm

Notification to send ‘Dam R’ Polygon Emergency Alert

PAR BURST

RDSWU BURST

TLNCA BURST

Stand Up


above EL 880.00m

and rising

(0.3m from Crest EL)

Updates from RSAS and BoM

DLDC Phone first

then BURST

Glen Niven Flood

Stand Up

Burst Messaging

DEWS Emergency WARNING

DAM: Glen Niven

EVENT: Flooding

STATUS: STAND UP - Reservoir Water Level: EL 880.00m and rising/steady, Dam failure likely

ACTION: Evacuate to higher ground now, follow evacuation plan,

more info SDRC 1300 697 372.


‘Dam Failure Likely’ Polygon Emergency Alert to be activated if

determined necessary

QPS Phone

PAR BURST

RDSWU BURST

TLNCA BURST



pg. 25

Stand Down



falling Updates from RSAS

and BoM

DLDC Phone first

then BURST

Glen Niven Flood

Stand Down


DAM: Glen Niven

EVENT : Flooding STATUS : STAND DOWN – Event over, Reservoir Water Level

below EL 880.00m and falling

ACTION: Stand down, evacuation cancelled, contact LDMG for

more details.

QPS Phone

PAR BURST

RDSWU BURST

TLNCA BURST



pg. 26

Table 11 - Flooding Event - TLNCA Communication Table


Communications

Contact Groups

(in Priority Order)


Normal Spillway Discharges


above (FSL) EL

879.35m


BoM

N/A

Alert


above EL 879.45m and rising


BoM

DNCA DDS

Phone

SMS Email

SitReps

Glen Niven Flood

Alert


DAM: Glen Niven EVENT : Flooding

STATUS : ALERT – EAP Activated, Reservoir Water Level EL 879.45m and

rising/steady

ACTION: Emergency response on standby


SitReps: to be forwarded as instructed by DNCA

Lean Forward

Reservoir water level above EL 879.75m and

rising


BoM

DNCA DDS

Phone SMS

Email

SitReps

Glen Niven Flood Lean Forward

DEWS Emergency NOTIFICATION DAM: Glen Niven

EVENT : Flooding

STATUS : LEAN FORWARD - Reservoir Water Level EL 879.75m and

rising/steady

ACTION: Emergency response on standby, PAR sent Notification to

prepare for evacuation, await further notifications or self-evacuate at early at signs of increased flooding UPDATE: Next update due by XX am/pm


Stand Up


above EL 880.00m

and rising

(0.3m from Crest EL) Updates from RSAS

and BoM

DNCA DDS

Phone

SMS

Email

SitReps

Glen Niven Flood

Stand Up


DAM: Glen Niven

EVENT : Flooding

STATUS : STAND UP - Reservoir Water Level EL 880.00m and rising/steady, Dam failure likely

Action: Emergency response activated, PAR sent Warning to evacuate to

higher ground, follow evacuation plan



Stand Down


below EL 880.00m and falling

Updates from RSAS

and BoM

DNCA DDS

Phone

SMS Email

SitReps

Glen Niven Flood

Stand Down



STATUS : STAND DOWN – Event over

Reservoir Water Level: Below EL 880.00m and falling

ACTION : Stand Down



pg. 27

Table 12 - Flooding Event - DNCA Communication Table


Communications

Contact Groups

(in Priority Order)


Normal Spillway

Discharges


above (FSL) EL

879.35m


BoM

N/A

Alert Reservoir water level

above EL 879.45m and rising


BoM

DDG-WSD

DG GM WSP&E

DEWSEM

DEWSM

Phone

SMS Email

SitReps

Glen Niven Flood

Alert



STATUS : ALERT – EAP Activated, Reservoir Water Level EL 879.45m and

rising/steady

ACTION: Emergency response on standby


SitReps: to be forwarded as instructed by DEWS Manager State Disaster Liaison Team

Lean Forward Reservoir water level


rising


BoM

DDG-WSD

DG

GM WSP&E

DEWSEM

DEWSM

Phone

SMS

Email

SitReps

Glen Niven Flood

Lean Forward


DAM: Glen Niven

EVENT : Flooding

STATUS : LEAN FORWARD - Reservoir Water Level EL 879.75m and

rising/steady

ACTION: Emergency response on standby, PAR sent Notification to prepare for evacuation, await further notifications or self-evacuate at early

at signs of increased flooding UPDATE: Next update due by XX am/pm

SitReps: to be forwarded as instructed by DEWS Manager State Disaster

Liaison Team

Stand Up Reservoir water level

above EL 880.00m

and rising

(0.3m from Crest EL)

Updates from RSAS

and BoM

DDG-WSD

DG

GM WSP&E

DEWSEM

DEWSM

Phone

SMS

Email

SitReps

Glen Niven Flood

Stand Up


DAM: Glen Niven

EVENT : Flooding

STATUS : STAND UP - Reservoir Water Level EL 880.00m and

rising/steady, Dam failure likely

Action: Emergency response activated, PAR sent Warning to evacuate to higher ground, follow evacuation plan


SitReps: to be forwarded as instructed by DEWS Manager State Disaster

Liaison Team



pg. 28

Stand Down Reservoir water level


falling Updates from RSAS

and BoM

DDG-WSD

DG

GM WSP&E DEWSEM

DEWSM

Phone

SMS

Email SitReps

Glen Niven Flood

Stand Down


DAM: Glen Niven

EVENT : Flooding STATUS : STAND DOWN – Event over

Reservoir Water Level: Below EL 880.00m and falling

ACTION : Stand Down



pg. 29

6.2 Structural Concerns

Dam safety issues may include:

Accessibility to the dam may be impeded by flood waters

Increasing rates of seepage or development of new seepage areas

Embankment instability

Displacement of the embankment

Cracking of the embankment (either transverse cracking or longitudinal cracks)

Development of seepage at the dam’s downstream toe or through the dam abutments.

If the embankment is breached (considered to have failed), it is expected that the breach will increase in

size with a corresponding increase in water discharges through the breach until such time as the

reservoir water level drains down.

It is unlikely that if a dam safety issue is identified at Glen Niven Dam that it will be possible to undertake

any repairs or mitigation during the event to arrest the issue from developing or to slow its development.



pg. 30

Table 13 - Structural Concerns - DIO Emergency Action Table

Activation

Status

Alert Lean Forward Stand Up Stand Down

Activation Trigger A structural concern has

been identified AND

No change detected

during surveillance

inspection


identified AND

Change detected during

surveillance inspection OR

A possible failure path has

been identified


seepage increasing and/or

cloudy

Risk Assessment has determined

that structural risk has reduced

Actions Notify EEC

Undertake Special

Inspections if requested by EEC

As per previous activation status As per previous activation status,

plus

As per previous activation status,

plus

Notifications EEC EEC EEC Nil




pg. 31

Table 14 - Structural Concerns - EEC Emergency Action Table

Activation Status Alert Lean Forward Stand Up Stand Down


been identified AND

No change detected

during surveillance

inspection


identified AND




identified

Failure in progress or likely, seepage

increasing and/or cloudy

Risk Assessment has determined that structural risk has reduced

Actions Activate EAP


Notify DLDC

Notify TLNCA

Phone DLDC

Activate EAP

Notify of EAP Activation or

status Escalation

Notify DLDC

Notify RDSWU (if applicable)

Notify PAR (if applicable)

Notify TLNCA

Make preparations for

mobilisation of remedial work materials and machinery if

required

As per previous activation status, plus

Phone DLDC


Notify DLDC

Warn RDSWU

Warn PAR

Notify TLNCA

Notify DNCA

Phone DLDC


Notify DLDC

Notify RDSWU

Notify PAR

Notify TLNCA

Prepare and forward EER2 to

TLNCA within 30 days if Activation

status reaches Stand Up or the

dam requires remedial work

Notifications and

Warnings DLDC

TLNCA

DLDC

RDSWU (if applicable)

PAR (if applicable)

TLNCA

Provide notification update

DLDC

RDSWU

PAR

TLNCA

Provide notification update

DLDC

RDSWU

PAR

TLNCA

NB:- Undertake Risk Assessment before considering action. 2Emergency Event Report (EER) to DDS within 30 business days of the event if stand up is reached, as specified in the Water Supply (Safety and Reliability) Act 2008



pg. 32

Table 15 - Structural Concerns - TLNCA Emergency Action Table



been identified AND




identified AND




identified



cloudy


that structural risk has reduced

Actions Notify DNCA of EAP Activation with SitReps

Notify DDS1 of EAP activation

Notify DNCA of EAP Activation

or status Escalation with

SitReps

Notify DDS1 of EAP Activation

or status Escalation

Notify DNCA of EAP status



Escalation

Notify DNCA of EAP Stand Down

Notify DDS of EAP Stand Down

Prepare and forward EER2 to DDS2

to within 30 working days if

Activation status reaches Stand Up

or the dam requires remedial work

Notifications and Warnings

DNCA

DDS1

DNCA

DDS1

DNCA

DDS1

DNCA

DDS1&2

Notify DDS within 48 hours of event, 2Forward Emergency Event Report (EER) to DDS within 30 working days of the event as specified in the Water Supply (Safety and Reliability) Act 2008



pg. 33

Table 16 - Structural Concerns - DNCA Emergency Action Table


Activation

Trigger A structural concern has

been identified AND




identified AND




identified

Failure in progress or likely, seepage

increasing and/or cloudy

Risk Assessment has determined that

structural risk has reduced

Actions Notify of EAP Activation

with SitReps

GM WSP&E

DDG-WSD

DG

Notify of EAP Activation or status

Ecsalation with SitReps

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

Notify of status Ecsalation with SitReps

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

Notify of EAP Stand Down with SitRep

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

Notifications and

Warnings None GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM



pg. 34

Table 17 - Structural Concerns - DIO Communication Table

Activation Status Trigger for Communications Contact Groups

(in Priority Order)

Method Message

Code

Message Text

N/A Request from EEC for

special inspection

EEC Phone N/A N/A



pg. 35

Table 18 - Structural Concerns - EEC Communication Table

Activation Status Trigger for Communications Contact Groups (in Priority Order)


Alert

A structural concern has

been identified AND



DLDC Phone first then BURST

Glen Niven Structural Alert


EVENT : Structural Concerns

STATUS : ALERT – EAP Activated, Structural concern,

Investigation underway

ACTION: PAR notified, houses are not at risk. UPDATE: Next update due by XX am/pm

RDSWU BURST

PAR BURST

TLNCA BURST

Lean Forward


been identified AND




been identified

DLDC Phone first

then BURST

Glen Niven Structural

Lean Forward


DAM: Glen Niven


STATUS : LEAN FORWARD - EAP Activated, Dam

affected, surveillance continuing

ACTION: PAR notified, houses are not at risk. UPDATE: Next update due by XX am/pm

RDSWU BURST

PAR BURST

TLNCA BURST

Stand Up



cloudy

DLDC Phone first

then BURST


Stand Up


DAM: Glen Niven


STATUS : STAND UP - Dam failure in progress

ACTION: Flood water will be contained in waterways,

houses are not at risk. Follow emergency services instructions.


RDSWU BURST

PAR BURST

TLNCA BURST

Stand Down

Risk Assessment has

determined that structural

risk has reduced

DLDC Phone first

then BURST


Stand Down


DAM: Glen Niven


STATUS : STAND DOWN - Event over

ACTION: Stand Down, contact LDMG for more details.

RDSWU BURST

PAR BURST

TLNCA BURST



pg. 36

Table 19 - Structural Concerns - TLNCA Communication Table



Alert


been identified AND



DNCA

DDS

Phone

SMS

Email

SitReps


Alert


DAM: Glen Niven



Investigation underway ACTION: PAR notified, houses are not at risk.



Lean Forward


been identified AND




been identified

DNCA

DDS

Phone

SMS

Email

SitReps


Lean Forward


DAM: Glen Niven


STATUS : LEAN FORWARD - Dam affected, surveillance continuing

ACTION: PAR notified, houses are not at risk.



Stand Up



cloudy

DNCA

DDS

Phone

SMS Email

SitReps


Stand Up


DAM: Glen Niven EVENT : Structural Concerns

STATUS : STAND UP – Dam failure in progress

ACTION: Emergency response activated. PAR notified,

floodwater will be contained in waterways, houses are not at risk



Stand Down

Risk Assessment has

determined that structural

risk has reduced

DNCA

DDS

Phone

SMS

Email

SitRep


Stand Down


DAM: Glen Niven


STATUS : STAND DOWN - Event over ACTION : Stand Down



pg. 37

Table 20 - Structural Concerns - DNCA Communication Table



Alert


been identified AND



GM WSP&E

DDG-WSD

DG

SMS

Phone

SMS


Alert


DAM: Glen Niven



Investigation underway ACTION: PAR notified, houses are not at risk.


SitReps: to be forwarded as instructed by DEWS Manager State

Disaster Liaison Team

Lean Forward


identified AND




been identified

GM WSP&E

DDG-WSD

DG DEWSEM

DEWSM

SMS

Phone

SMS Email

SitReps


Lean Forward


DAM: Glen Niven

EVENT : Structural Concerns STATUS : LEAN FORWARD - Dam affected, surveillance

continuing




Stand Up



cloudy

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

SMS

Phone

SMS

Email

SitReps


Stand Up


DAM: Glen Niven



ACTION: Emergency response activated. PAR notified,

floodwater will be contained in waterways, houses are not at risk




Stand Down

Risk Assessment has determined that structural

risk has reduced

GM WSP&E DDG-WSD

DG

DEWSEM

DEWSM

SMS Phone

SMS

Email

SitRep

Glen Niven Structural Stand Down




ACTION : Stand Down



pg. 38

6.3 Water Contamination

6.3.1 Contamination in the Reservoir or Catchment

Water in Glen Niven Dam may become contaminated, impacting on riparian and downstream water

users.

Contamination may occur by either biological processes in the water reservoir itself or by chemical

pollution from incidents/activities in the dam catchment.

During periods of dry weather (no discharges from Glen Niven Dam) any contamination will be fully

contained within the dam impacting only on upstream water users.

In the event that contamination occurs prior to or during a period when water is discharging through the

spillway, any toxicity is likely to be diluted and have less of an impact.

6.3.2 Biological Contamination

Biological events within the reservoir can result in its contamination. These events include blue-green

algae blooms or a high level of microscopic pathogens such as cryptosporidium and giardia.

After long periods of low inflow, oxygen depletion can cause fish kills, polluting the water reservoir as the

fish decay.

6.3.3 Toxic Inflows into the Reservoir

Contamination from toxic inflows could be from spill incidents or on-going leachate seepage from current or past activities in Glen Niven Dam catchment.



pg. 39

Table 21 - Water Contamination - DIO Emergency Action Table


Activation Trigger Reports of contamination or


reservoir or catchment area

Not Applicable Confirmation of or high probability

of significant contamination found in the reservoir or catchment area

Risk Assessment that risk

has reduced

Confirmation that significant

contamination has not

occurred


Actions Notify EEC

Undertake Special Inspection if

requested by EEC

Not Applicable Notify EEC

Undertake Special Inspections if

requested by EEC

N/A

Notifications EEC Not Applicable EEC Nil




pg. 40

Table 22 - Water Contamination - EEC Emergency Action Table






of significant contamination found

in the reservoir or catchment area

Risk Assessment that risk has reduced


contamination has not occurred




Notify DLDC

Seek advice for sampling and

testing, Appendix 1,toxic spill

contacts

Request DIO to do a special

inspection

Notify RDSWU

Notify TLNCA

Record data of the event and

maintain an event log of all

actions and communications

Not Applicable Phone DLDC


WARNING to DLDC

Notify DIO

WARNING to RDSWU not to use

the water until further notice

Notify TLNCA

Phone DLDC


Notify DLDC

Notify DIO

Notify

Notify TLNCA

Prepare and forward EER 2 to TLNCA

within 30 Days if Activation status

reaches Stand Up

Notifications and

Warnings DLDC

DIO

RDSWU

TLNCA

Not Applicable DLDC

DIO

RDSWU

TLNCA

DLDC

DIO

RDSWU

TLNCA

NB:- Undertake Risk Assessment before considering action. 2Forward Emergency Event Report (EER) to TLNCA within 30 days of the event as specified in the Water Supply (Safety and Reliability) Act 2008



pg. 41

Table 23 - Water Contamination - TLNCA Emergency Action Table



potential contamination in

the reservoir or catchment

area


of significant contamination found

in the reservoir or catchment area

Risk Assessment that risk has

reduced




Actions Notify DNCA of EAP


Notify DDS1 of EAP

Activation

Not Applicable Notify DNCA of EAP status

escalation with SitReps


escalation

Notify DNCA that the event is over

with SitRep

Notify DDS that the event is over

Prepare and forward EER2 to DDS2

to within 30 working days if

Activation status reaches Stand Up

Notifications and

Warnings DNCA

DDS1

None DNCA

DDS

DNCA

DDS1&2

1 Notify DDS within 48 hours of event, 2Forward Emergency Event Report (EER) to DDS within 30 working days of the event as specified in the Water Supply (Safety and Reliability) Act 2008



pg. 42

Table 24 - Water Contamination - DNCA Emergency Action Table





Not Applicable Confirmation of or high probability of

significant contamination found in the



has reduced




Actions Notify of EAP Activation with

SitReps

GM WSP&E

DDG-WSD

DG,

DEWSEM

DEWSM

Not Applicable Notify of EAP Ecscalation with

SitReps and incident report

GM WSP&E

DDG-WSD and

DG

DEWSEM

DEWSM


with SitRep

GM WSP&E

DDG-WSD and

DG,

DEWSEM

DEWSM

Notifications and

Warnings GM WSP&E

DDG-WSD,

DG

DEWSEM

DEWSM

None GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

GM WSP&E

DDG-WSD,

DG

DEWSEM

DEWSM



pg. 43

Table 25 - Water Contamination - DIO Communication Table

Activation

Status

Trigger for Communications Contact Groups

(in Priority Order)


Alert


potential contamination in the reservoir or catchment area

EEC Phone Glen Niven Quality

Alert DIO

DIO Emergency NOTIFICATION

DAM: Glen Niven EVENT: Water Quality Contamination

STATUS : ALERT – Investigation underway

ACTION: STAND BY


Relay EEC messages if required

Lean Forward Not Applicable

Stand Up


probability of contamination found in the reservoir/catchment

EEC Phone

or SMS

Glen Niven Quality

Stand Up DIO


DAM: Glen Niven EVENT: Water Quality Contamination

STATUS: STAND UP – Contamination Confirmed


Relay EEC messages if required

Stand Down


reduced

Confirmation that significant contamination has not occurred


EEC Phone

or SMS

Glen Niven Quality

Stand Down

DIO

DIO Emergency Notification

DAM: Glen Niven

EVENT: Water Quality Contamination STATUS : STAND DOWN – Event over

ACTION: WATER SAFE TO USE



pg. 44

Table 26 - Water Contamination - EEC Communication Table

Activation

Status


(in Priority Order)


Alert



DLDC Phone first

then BURST

Glen Niven Quality

Alert


DAM: Glen Niven EVENT : Water Quality Contamination

STATUS : ALERT – EAP Activated, Investigation underway

ACTION: AVOID ALL USE OR CONTACT WITH WATER


DIO BURST

RDSWU BURST

TLNCA BURST


Stand Up


probability of a large

amount of contamination

found in the

reservoir/catchment

DLDC Phone first

then BURST

Glen Niven Quality

Stand Up


DAM: Glen Niven

EVENT : Water Quality Contamination

STATUS : STAND UP – Contamination Confirmed

ACTION: AVOID ALL USE OR CONTACT WITH WATER,

campers evacuated. UPDATE: Next update due by XX am/pm

DIO Phone

RDSWU BURST

TLNCA BURST

Stand Down


has reduced



occurred


DLDC Phone first

then BURST

Glen Niven Quality

Stand Down


DAM: Glen Niven


STATUS : STAND DOWN –Event over

ACTION: WATER SAFE TO USE

DIO Phone

RDSWU BURST

TLNCA BURST



pg. 45

Table 27 - Water Contamination - TLNCA Communication Table

Activation

Status


(in Priority Order)


Alert



DNCA

DDS

Phone

SMS Email

SitReps

Glen Niven Quality

Alert




ACTION: STAND BY, Emergency services notified, water users

notified




Stand Up

Confirmation of or high DNCA DDS

Phone SMS

Email

SitReps

Glen Niven Quality Stand Up

DEWS Emergency WARNING DAM: Glen Niven



ACTION: LDMG - Emergency response activated, campers

evacuated, water users notified

UPDATE: Next update due by XX am/pm SitReps: to be forwarded as instructed by DNCA

Stand Down


reduced



occurred


DNCA

DDS

Phone

SMS

Email

SitRep

Glen Niven Quality

Stand Down

DEWS Emergency Notification

DAM: Glen Niven



ACTION: WATER SAFE TO USE, Emergency response stood

down and water users notified SitRep: to be forwarded as instructed by DNCA



pg. 46

Table 28 - Water Contamination - DNCA Communication Table

Activation

Status


(in Priority Order)


Alert



GM WSP&E

DDG-WSD DG

DEWSEM

DEWSM

Phone

SMS Email

SitReps

Glen Niven Quality

Alert




ACTION: STAND BY, Emergency services notified, water users

notified




Stand Up

Confirmation of or high GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

Phone

SMS

Email

SitReps

Glen Niven Quality

Stand Up


DAM: Glen Niven



ACTION: LDMG - Emergency response activated, campers

evacuated, water users notified UPDATE: Next update due by XX am/pm



Stand Down


reduced




GM WSP&E

DDG-WSD

DG

DEWSEM DEWSM

Phone

SMS

Email

SitRep

Glen Niven Quality

Stand Down

DEWS Emergency Notification

DAM: Glen Niven


STATUS : STAND DOWN – Event over ACTION: WATER SAFE TO USE, Emergency response stood

down and water users notified

SitRep: to be forwarded as instructed by DEWS Manager State




pg. 47

6.4 Terrorist or High Energy Impact

Sabotage or Vandalism

There is infrastructure located at Glen Niven that may be the target of sabotage or vandalism. However, there is no critical infrastructure that if interfered with is likely to lead to a dam failure

occurring or significant downstream release.

This infrastructure includes but is not limited to:

Glen Niven Dam embankment or spillway

Pumping facilities

RSAS

Security fencing and safety signs

Any identified sabotage or vandalism should be treated as serious and the following actions are

recommended:-

Immediately report the incident to Team Leader, Non-Commercial Assets (TLNCA) at the

earliest opportunity;

Take photographs of the damage or incident site;

If possible and safe to do so, record and photograph unusual vehicle details including

registration, description, time, date etc.

Barricaded the area to enable the incident site to be inspected and investigated;

Report the incident to Police; and

Conduct a dam safety inspection to confirm if the incident has caused other damage to

the dam.



pg. 48

Table 29 - Terrorist or High Energy Impact - DIO Emergency Action Table


Activation Trigger THREAT

Possible terrorist

activity/suspicions noticed at

the dam

Threat received

EVENT

Large explosion

heard/observed at dam

(e.g. bomb explosion, aircraft hit)

Failure in progress or likely due



that failure risk has reduced

Actions Notify EEC

Notify Police on 000

Inspect dam (if safe) and

ensure all security measures

in place

Maintain photo record

Log Book entry

If police appoint incident manager, follow instructions

As per previous

activation status, plus

Undertake surveillance,

inspect dam (if safe)

Log Book entry


status, plus

Vacate the immediate vicinity

of the embankment and downstream areas

Close Border and Aerodrome

Roads, erect road closed signs.

Log Book entry

Prepare and forward event report

including photos to EEC

Reopen Border and Aerodrome

Roads, remove road closed signs.

Return to routine activities and

weekly inspections

Log Book entry

Notifications EEC

Police on 000

EEC

Police on 000

EEC

Police on 000

Nil




pg. 49

Table 30 - Terrorist or High Energy Impact - EEC Emergency Action Table

Activation

Status


Activation Trigger

THREAT

Possible terrorist


the dam

Threat received

EVENT

Large explosion heard/observed

at dam (e.g. bomb explosion,

aircraft hit)

Threat confirmed

Failure in progress or likely due to impact or

explosion

Risk Assessment has determined that failure risk has reduced

Actions Phone Police

Phone DLDC

Phone DIO

Activate EAP


Notify DLDC

Notify DIO

Notify RDSWU

Notify PAR

Notify TLNCA

If police appoint incident

manager support and follow

instructions

Monitor situation and assess risks

Phone Police

Phone DLDC

Phone DIO

Activate EAP


Notify DLDC

Notify DIO

Notify RDSWU

Notify PAR

Notify TLNCA

Phone DLDC

Notify of EAP

Escalation

Notify DLDC

Notify DIO

Warn RDSWU

Warn PAR

Notify TLNCA

Phone DLDC

Phone Police


Notify DLDC

Notify DIO

Notify RDSWU

Notify PAR

Notify TLNCA

Prepare and forward EER2 to TLNCA within

30 days if the Activation status reaches Stand UP or dam requires remedial work

Notifications

and Warnings Police

DLDC

DIO

RDSWU

PAR

TLNCA

Police

DLDC

DIO

RDSWU

PAR

TLNCA

DLDC

DIO

RDSWU

PAR

TLNCA

DLDC

Police

DIO

RDSWU

PAR

TLNCA




pg. 50

Table 31 - Terrorist or High Energy Impact - TLNCA Emergency Action Table


Activation Trigger THREAT

Possible terrorist


the dam

Threat received

EVENT

Large explosion heard/observed at dam

(e.g. bomb explosion,

aircraft hit)

Failure in progress or likely due


Risk Assessment has determined that

failure risk has reduced



Notify DDS1 of EAP

Activation

Notify DNCA of EAP

Escalation with

SitReps

Notify DDS1 of EAP

Escalation

Notify DNCA of EAP


Notify DDS1 of EAP

Escalation

Notify DNCA of EAP Stand Down with

SitRep

Notify DDS1 of EAP Stand Down

Notifications and

Warnings DNCA

DDS1

DNCA

DDS1

DNCA

DDS1

DNCA

DDS1&2 1 Notify DDS within 48 hours of event, 2Emergency Event Report (EER) to DDS within 30 business days of the event if stand up is reached, as specified in the Water Supply (Safety and Reliability) Act 2008



pg. 51

Table 32- Terrorist or High Energy Impact - DNCA Emergency Action Table


Activation

Trigger

THREAT

Possible terrorist

activity/suspicions noticed at the

dam

Threat received

EVENT

Large explosion heard/observed at dam (e.g. bomb explosion,

aircraft hit)

Failure in progress or likely due to

impact or explosion



Actions Notify of EAP Activation with SitReps

Notify GM WSP&E

Notify DDG-WSD

Notify DG

Notify DEWSEM

Notify DEWSM

Notify of EAP Escalation with SitReps

Notify GM WSP&E

Notify DDG-WSD

Notify DG

Notify DEWSEM

Notify DEWSM

Notify of EAP Escalation with SitReps

Notify GM WSP&E

Notify DDG-WSD

Notify DG

Notify DEWSEM

Notify DEWSM

Notify of EAP Stand Down with

SitRep

Notify GM WSP&E

Notify DDG-WSD

Notify DG

Notify DEWSEM

Notify DEWSM

Notifications and

Warnings GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM



pg. 52

Table 33 - Terrorist or High Energy Impact - DIO Communication Table


Communications

Contact Groups

(in Priority Order) Method Message Code Message Text

Alert

THREAT

Possible terrorist

activity/suspicions

noticed at the dam

Threat received

EEC Phone Glen NivenEmergency Stand Up 1

DIO

DIO Emergency NOTIFICATION DAM: Glen Niven

EVENT: Terrorist or High Energy Impact

STATUS: ALERT – Received/Noted Terrorist Threat

UPDATE: Next update due by XX am/pm Police on 000 Phone

Lean Forward

EVENT

Large explosion

heard/observed at

dam (e.g. bomb

explosion, aircraft hit)

EEC Phone Glen Niven Emergency

Stand Up 2

DIO


DAM: Glen Niven


STATUS: LEAN FORWARD – Large Explosion reported at dam UPDATE: Next update due by XX am/pm

Police on 000 Phone

Stand Up

Failure in progress or

likely due to impact or

explosion

EEC Phone Glen Niven Emergency

Stand Up 3

DIO


DAM: Glen Niven


STATUS: STAND UP – Dam failure in progress

UPDATE: Next update due by XX am/pm Police on 000 Phone

Stand Down

Risk Assessment has

determined that failure

risk has reduced EEC Phone

Glen Niven Emergency

Stand Down

DIO


DAM: Glen Niven


STATUS: STAND DOWN- Event over.



pg. 53

Table 34 - Terrorist or High Energy Impact - EEC Communication Table

Activation

Status

Trigger for

Communications

Contact Groups

(in Priority Order)


Alert

THREAT

Possible terrorist

activity/suspicions

noticed at the dam

Threat received

Police on 000 Phone Glen Niven Emergency Stand Up 1


EVENT : Terrorist or High Energy Impact

STATUS : ALERT- EAP Activated, Received/Noted

Terrorist Threat

ACTION: Emergency response activated, PAR notified,

houses are not at risk. UPDATE: Next update due by XX am/pm

DIO Phone

DLDC Phone First then BURST

RDSWU BURST

PAR BURST

TLNCA BURST

Lean Forward

EVENT

Large explosion

heard/observed at

dam (e.g. bomb explosion, aircraft hit)

Police on 000 Phone Glen Niven Emergency

Stand Up 2


DAM: Glen Niven


STATUS : LEAN FOWARD – EAP Activated, Large

Explosion reported at dam

ACTION: Emergency response activated, PAR notified, houses are not at risk.


DIO Phone

DLDC Phone First

then BURST

RDSWU BURST

PAR BURST

TLNCA BURST

Stand Up



explosion

DLDC Phone First

then BURST


Stand Up 3


DAM: Glen Niven


DAM FAILURE IN PROGRESS

STATUS : STAND UP – EAP Activated, Dam failure in progress


houses are not at risk. Follow emergency services

instructions.


DIO Phone

RDSWU BURST

PAR BURST

TLNCA BURST

Stand Down

Risk Assessment has

determined that failure risk has reduced

DLDC BURST Glen Niven Emergency

Stand Down


DAM: Glen Niven EVENT : Terrorist or High Energy Impact

STATUS: STAND DOWN – Event over

ACTION: Stand Down, contact LDMG for more details.

DIO Phone

RDSWU BURST

PAR BURST

TLNCA BURST



pg. 54

Table 35 - Terrorist or High Energy Impact - TLNCA Communication Table


Communications

Contact Groups

(in Priority Order)


Alert

THREAT Possible terrorist

activity/suspicions noticed

at the dam

Threat received

DNCA DDS

Phone SMS

Email

SitReps

Glen Niven Emergency Stand Up 1



STATUS : ALERT – EAP Activated, Received/Noted Terrorist

Threat

ACTION: Emergency response activated, PAR notified, houses

are not at risk. UPDATE: Next update due by XX am/pm


Lean Forward

EVENT

Large explosion

heard/observed at dam

(e.g. bomb explosion,

aircraft hit)

DNCA

DDS

Phone

SMS

Email

SitReps


Stand Up 2


DAM: Glen Niven


STATUS : LEAN FOWARD – EAP Activated, Large Explosion

reported at dam ACTION: Emergency response activated, PAR notified, houses

are not at risk.



Stand Up



explosion

DNCA

DDS

Phone

SMS

Email SitReps


Stand Up 3


DAM: Glen Niven

EVENT : Terrorist or High Energy Impact STATUS : STAND UP – EAP Activated, Dam failure in progress

ACTION: Flood water will be contained in waterways, houses

are not at risk.



Stand Down

Risk Assessment has


DNCA

DDS

Phone

SMS Email

SitRep


Stand Down




ACTION: Stand Down

SitRep: to be forwarded as instructed by DNCA



pg. 55

Table 36 - Terrorist or High Energy Impact - DNCA Communication Table

Activation

Status

Trigger for

Communications

Contact Groups

(in Priority Order)


Alert

THREAT Possible terrorist

activity/suspicions

noticed at the dam

Threat received

GM WSP&E DDG-WSD

DG

DEWSEM

DEWSM

SMS Phone

SMS

Email

SitReps

Glen Niven Emergency Stand Up 1



STATUS : ALERT – EAP Activated, Received/Noted Terrorist Threat

ACTION: Emergency response activated, PAR notified, houses are not

at risk.

UPDATE: Next update due by XX am/pm SitReps: to be forwarded as instructed by DEWS Manager State


Lean Forward

EVENT

Large explosion

heard/observed at

dam (e.g. bomb

explosion, aircraft hit)

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

SMS

Phone

SMS

Email

SitReps


Stand Up 2


DAM: Glen Niven


STATUS : LEAN FOWARD – EAP Activated, Large Explosion

reported at dam ACTION: Emergency response activated, PAR notified, houses are not

at risk.




Stand Up


likely due to impact or explosion

GM WSP&E

DDG-WSD DG

DEWSEM

DEWSM

SMS

Phone SMS

Email

SitReps


Stand Up 3



STATUS : STAND UP – EAP Activated, Dam failure in progress

ACTION: Flood water will be contained in waterways, houses are not

at risk.



Stand Down

Risk Assessment has

determined that

failure risk has

reduced

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

SMS

Phone

SMS

Email

SitRep


Stand Down


DAM: Glen Niven



ACTION: Stand Down

SitRep: to be forwarded as instructed by DEWS Manager State Disaster Liaison Team



pg. 56

6.5 Earthquake

The embankment slopes are considered steep and highly prone to slipping if there was an Earthquake

event in close proximity to Glen Niven Dam. Possible signs of damage:

Cracking of the embankment;

Slipping or slumping of the embankment;

Increased rate of seepage;

In the event of an earthquake being monitored and reported in the area the following actions are

recommended:-

Log into and review the readings for the dam on the Remote Sensing and Alert System

(RSAS). Continue to monitor the RSAS for any changes on a regular basis (at least 3

hourly) over the next 48 hours;

Arrange for a dam inspection to be undertaken as soon as possible.



pg. 57

Table 37 - Earthquake - DIO Emergency Action Table

Activation

Status


Activation Trigger Earthquake reported or felt in

the area

Intensity less than 5 M/MM

AND




area

Intensity greater than or equal to

5 M/MM,

OR


change detected OR a possible

failure path has been identified

Earthquake reported or felt in

the area, and



cloudy

Risk Assessment has


Actions Notify EEC

Inspect the Dam

Embankment, Spillway, Abutments and Fuse Plug

(undertake risk assessment)

checking for leaks,

deformation, erosion and

concrete damage

Report to EEC

Maintain photographic record

Record data of the event and

maintain an event log of all

actions and communications

Log Book entry

As per previous activation status

Close Border and aerodrome

Roads, erect road closed signs

Vacate the immediate vicinity of

the reservoir and downstream

Support/ supervise remedial

works as required

Repeat the inspection as directed

by EEC

Provide inspection report to EEC

Log Book entry


plus

Maintain surveillance of the

reservoir and downstream as

directed by EEC

Log Book entry

Forward event report

including photos for EEC

Return to routine activities

and weekly inspections

Log Book entry

Reopen Border and

Aerodrome Roads, remove

road closed signs when

directed by EEC

Notifications EEC EEC EEC EEC




pg. 58

Table 38 - Earthquake - EEC Emergency Action Table


Activation Trigger Earthquake reported or felt

in the area

Intensity less than 5 M/MM

and




area

Intensity greater than or equal to 5

M/MM, OR






cloudy

Risk Assessment has

determined that failure risk

has reduced



Notify DLDC

Notify DIO

Notify RDSWU

Notify PAR

Notify TLNCA

Phone DLDC

Activate EAP


Escalation

Notify DLDC

Notify DIO,

Notify RDSWU

Notify PAR

Notify TLNCA

Investigate availability of machinery

and materials

Place machinery operators on

stand by


plus

Phone DLDC

Notify of status Escalation

Notify DLDC,

Notify DIO,

Notify RDSWU,

Notify PAR,

Notify TLNCA

Phone DLDC


Notify DLDC

Notify DIO

Notify RDSWU

Notify PAR

Notify TLNCA


TLNCA within 30 days if

Alert status reaches Stand

UP or dam requires remedial

work

Notifications and

Warnings DLDC

DIO

RDSWU

PAR

TLNCA

DLDC

DIO

RDSWU

PAR

TLNCA

DLDC

DIO

RDSWU

PAR

TLNCA

DLDC

DIO

RDSWU

PAR

TLNCA




pg. 59

Table 39 - Earthquake - TLNCA Emergency Action Table


Activation

Trigger Earthquake reported or

felt in the area

Intensity less than 5

M/MM and

No change detected

during surveillance

inspection


area


M/MM, OR






cloudy

Risk Assessment has


has reduced



Notify DDS1 of EAP

Activation

Notify DNCA of EAP Activation or


Notify DDS of EAP Activation or

Escalation

Notify DNCA of EAP Escalation

with SitReps

Notify DDS of EAP Escalation

Notify DNCA of EAP Stand

Down with SitRep

Notify DDS of Stand Down


DDS2 to within 30 working

days if Activation status

reaches Stand Up or the dam

requires remedial work

Notifications and

Warnings DNCA

DDS1

DNCA

DDS

DNCA

DDS

DNCA

DDS2

1 Notify DDS within 48 hours of event, 2Emergency Event Report (EER) to DDS within 30 business days of the event if stand up is reached, as specified in the Water Supply (Safety and Reliability) Act 2008



pg. 60

Table 40 - Earthquake - DNCA Emergency Action Table


Activation

Trigger Earthquake reported or

felt in the area

Intensity less than 5

M/MM and

No change detected

during surveillance

inspection


area


M/MM, OR






cloudy

Risk Assessment has


has reduced

Actions Notify of EAP Activation

with SitReps

Notify GM WSP&E

Notify DDG-WSD

Notify DG

Notify DEWSEM

Notify DEWSM



Notify GM WSP&E

Notify DDG-WSD

Notify DG

Notify DEWSEM

Notify DEWSM


status

Notify of status Escalation with

SitReps

Notify GM WSP&E

Notify DDG-WSD

Notify DG

Notify DEWSEM

Notify DEWSM


with SitRep

Notify GM WSP&E

Notify DDG-WSD

Notify DG

Notify DEWSEM

Notify DEWSM

Notifications and

Warnings GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM



pg. 61

Table 41 - Earthquake - DIO Communication Table

Activation

Status


(in Priority Order)


Alert


area Intensity less than 5 M/MM and



EEC Phone Glen Niven Quake

Alert DIO


DAM: Glen Niven EVENT: Earthquake

STATUS: ALERT - Earthquake reported or felt in the area,

Investigation underway


Lean Forward


area


5 M/MM, OR





Lean Forward

DIO


DAM: Glen Niven

EVENT: Earthquake STATUS: LEAN FORWARD – Earthquake confirmed, dam

affected, surveillance continuing

Reservoir Water level: XXX.XXm AHD


Stand Up

Dam failure in progress or likely,



Stand Up

DIO


DAM: Glen Niven

EVENT: Earthquake

STATUS: STAND UP – Dam failure in progress

Reservoir Water level: XXX.XXm AHD UPDATE: Next update due by XX am/pm

Stand Down




Stand Down

DIO


DAM: Glen Niven

EVENT: Earthquake


Reservoir Water Level: XXX.XXm AHD



pg. 62

Table 42 - Earthquake - EEC Communication Table

Activation

Status

Trigger for Communications Contact Groups (in Priority Order)


Alert


area Intensity less than 5 M/MM and



DLDC BURST Glen Niven Quake

Alert



STATUS : ALERT – EAP Activated, Unconfirmed



DIO Phone

RDSWU BURST

PAR BURST

TLNCA BURST

Lean Forward


area


M/MM, OR




DLDC Phone first

then BURST

Glen Niven Quake

Lean Forward


DAM: Glen Niven

EVENT: Earthquake STATUS: LEAN FORWARD – EAP Activated,

Earthquake confirmed, dam affected, surveillance

continuing



DIO Phone

RDSWU BURST

PAR BURST

TLNCA BURST

Stand Up



DLDC Phone first

then BURST

Glen Niven Quake

Stand Up





houses are not at risk. Follow emergency services

instructions.


DIO Phone

RDSWU BURST

PAR BURST

TLNCA BURST

Stand Down

Risk Assessment has determined that failure risk has reduced

DLDC Phone first then BURST

Glen Niven Quake Stand Down


EVENT: Earthquake


ACTION: Stand Down, contact LDMG for more

details.

DIO Phone

RDSWU BURST

PAR BURST

TLNCA BURST



pg. 63

Table 43 - Earthquake - TLNCA Communication Table

Activation

Status


(in Priority Order)


Alert


area Intensity less than 5 M/MM DNCA DDS

Phone

SMS Email

SitReps

Glen Niven Quake

Alert




ACTION: PAR notified, houses are not at risk



Lean Forward


area


5 M/MM, OR




DNCA DDS

Phone

SMS Email

SitReps

Glen Niven Quake

Lean Forward



STATUS: LEAN FORWARD – EAP Activated, Earthquake

confirmed, dam affected, surveillance continuing




Stand Up



DNCA DDS

Phone SMS

Email

SitReps

Glen Niven Quake Stand Up


EVENT: Earthquake


ACTION: Emergency response activated.

PAR notified, floodwater will be contained in waterways,

houses are not at risk UPDATE: Next update due by XX am/pm


Stand Down


that failure risk has reduced DNCA DDS

Phone

SMS

Email

SitRep

Glen Niven Quake

Stand Down


DAM: Glen Niven

EVENT: Earthquake


ACTION: Stand Down. SitRep: to be forwarded as instructed by DNCA



pg. 64

Table 44 - Earthquake - DNCA Communication Table

Activation

Status


(in Priority Order)


Alert


area Intensity less than 5 M/MM

GM WSP&E

DDG-WSD DG

Phone

SMS Email

SitReps

Glen Niven Quake

Alert






SitReps: to be forwarded as instructed by DEWS Manager

State Disaster Liaison Team

Lean Forward


area


5 M/MM, OR




GM WSP&E DDG-WSD

DG

Phone SMS

Email

SitReps

Glen Niven Quake Lean Forward


EVENT: Earthquake

STATUS: LEAN FORWARD – EAP Activated, Earthquake

confirmed, dam affected, surveillance continuing


UPDATE: Next update due by XX am/pm SitReps: to be forwarded as instructed by DEWS Manager


Stand Up



GM WSP&E

DDG-WSD

DG

DEWSEM

DEWSM

Phone

SMS

Email

SitReps

Glen Niven Quake

Stand Up


DAM: Glen Niven

EVENT: Earthquake


ACTION: Emergency response activated. PAR notified, floodwater will be contained in waterways,

houses are not at risk


SitReps: to be forwarded as instructed by DEWS Manager


Stand Down



GM WSP&E

DDG-WSD DG

DEWSEM

DEWSM

Phone

SMS Email

SitRep

Glen Niven Quake

Stand Down




ACTION: Stand Down.

SitRep: to be forwarded as instructed by DEWS Manager


Appendix 1 has been redacted



pg. 69

Appendix 2 - Glen Niven Dam Locality Plan and Access Route



pg. 70

Appendix 3 - Glen Niven Dam Catchment Boundary Map



pg. 71

Appendix 4 – Inspection Safety Protocol All officers who visit the dam site are to observe this protocol.

1) Inspections are to be carried out only when conditions are deemed to be safe as per inspection

and risk assessment/s.

2) Once the EAP has been activated (i.e. at or above Alert level) only DI officers are authorised

to visit the dam site during if requested by the EEC.

3) DI officers must be accompanied by another officer when on the site, for safety reasons.

4) Mobile phone coverage is available in this area and a minimum of one handset (fully charged)

is to be carried by each visiting group.

5) During an emergency event access to dam structure or main spillway is not to be made by

boat.



pg. 72

Appendix 5 – Potential Problem Identification INSPECTION OF EMBANKMENT DAMS

INSPECTING FOR DEFICIENCIES: SUMMARY

TYPE OF DEFICIENCY LOOK FOR

SEEPAGE A water flow or sand boil on the lower portion of the

downstream slope or toe area, especially at the groins. Wet areas or areas where the vegetation appears greener or

lusher on the embankment slope or toe area.

An increase in the amount of water being released from toe

drains and relief wells. (Remember to take into account

changes in the reservoir level.)

Turbidity or cloudiness of the seepage.

CRACKING Desiccation Cracking: A random honeycomb pattern of cracks usually found on the crest and the downstream slope.

Transverse Cracking: Cracks that are perpendicular to the

length of the dam usually found on the crest.

Longitudinal Cracking: Cracks that are parallel to the length

of the dam. Longitudinal cracks may be associated with

stability problems in the slopes.

INSTABILITY Slides on the upstream or downstream slopes. Bulging, especially at the toe of the dam.

DEPRESSIONS Misalignment in the crest and embankment slopes found by

sighting along fixed points.

Sinkholes found by checking and probing each depression.

Remember, sinkholes have steep, bucket like sides while

minor depressions have gently sloping, bowl like sides.

MAINTENANCE

CONCERNS

Inadequate Slope Protection: Check for bald areas or areas

where the protection is sparse or damaged. Surface Runoff Erosion: Check for gullies or other signs of

erosion. Make sure to check the low points along the

upstream and downstream shoulders and groins since

surface runoff can collect in these areas.

Inappropriate Vegetative Growth: Check for excessive and

deep rooted vegetative growth. Debris: Check for debris on and around the dam, especially

near the spillways.

Animal Burrows: Check for damage caused by burrowing

animals.

Note: This tabulation taken from Dam Safety Surveillance Field Manual-August 2005



pg. 73

WHEN TO GET FURTHER ASSISTANCE

These deficiencies are very serious. If you observe any of the following, you should consult with the EEC

or TLNCA.

Sand boils or turbid seepage.

Seepage that has increased since the last inspection (taking the reservoir level into

consideration).

Cracking that extends below the reservoir level or potential reservoir level.

Transverse and longitudinal cracking.

Deep seated slides or bulging associated with slides.

Sinkholes or other large depressions.

Deep rooted vegetation that might need to be removed.

Remember, whenever you are unsure whether or not a condition poses a threat to the safety of the dam, you should discuss your findings with EEC or Team Leader, Non-Commercial Assets.



pg. 74

Appendix 6 – Weather Monitoring, RSAS, BoM and rainfall duration curves

Weather monitoring sampling frequencies by EEC

It is the responsibility of the EEC to closely monitor the storage behaviour on RSAS and weather conditions on BOM before and during flooding events, interpret data and make decisions including

issuing directions and initiating emergency messaging.

The required sampling frequency will vary during different stages of a flooding event and the sampling

rationale provided below should be followed.

Preliminary sampling of the RWL will commence in advance to assess available storage air space if significant rainfall event is forecast for the area.

Sampling of a new inflow event will commence on an hourly basis when an Activation Trigger, Normal

Spillway Discharges is received, sampling needs to be more frequent (hourly) during the start or rising

stage of a flooding event to assess the rate of increase and likelihood and timing of status escalation up

to the flood event peak before the TLNCA and/or DNCA may consider and recommend less frequent

sampling during the recession stage until the event is considered over.

Hourly sampling will recommence if additional rainfall causes a subsequent rising trend in RWL.

Remote Sensing and Alert System (RSAS)

The RSAS provides two primary functions;

1) Displays monitored instrumentation on the Hydroscot Portal providing real time, hourly updates

of the following storage attributes;

Storage (Reservoir) level (m)

Cumulative Rainfall (mm)

2) Automatically sends SMS alerts to a preselected DEWS RSAS Notification List at pre-set

instrumentation trigger levels.

The location of the RSAS is on the right bank of the storage within the secured pumping compound.

Logging in to the Hydroscot Portal to view storage attributes

https://s1.hydroscot.com.au/

Note: To Log in to the portal you must have prior approval as a registered user with an assigned password and log in.

From the HydroScot homepage left click on the ‘Data Portal’ tab

From the opened Portal Page left click on the red ‘Login’ prompt

https://s1.hydroscot.com.au/



pg. 75

Bookmark or save this page to speed up the login process for next time

Enter your assigned login details in the appropriate fields and left click ‘Sign In’

Hydroscot portal

The portal displays information on five (5) DEWS dam monitoring sites.

Ensure you are assessing data for Glen Niven Dam in the top left corner.

Data upload frequency

Data is uploaded to the website generally hourly, during periods of rapid change it has been noted the interval for some data has reduced to as low as 4 minutes for relevant data.

The first dashboard page displays a 24 hour overview of the readings, with a table on the left and graph on the right.

The table on the left displays the latest readings and includes current status with colour coded cells similar to the EAP event activation levels. Green, Yellow & Red

The Graph on the right displays 24 hour overview of past readings; the data trend lines are interactive displaying readings and time as well as zoom function.

A menu icon in the top right corner allows chart images to be printed or saved.

More information is available on the second dashboard page by clicking the ‘Glen Niven Dam (Click for MORE…’ icon)

The second dashboard page provides additional information in similar format and functions as the first page, however for a longer duration, the graph displays a 3.5 day overview, and individual primary data tables for 9 hours.

To log out simply click the ‘X’ in the top right hand corner



pg. 76

Interpreting data trends over time to predict escalation and predict/justify emergency responses

The information and data obtained from the RSAS can be used in the following ways to provide useful information for resources managing an emergency event, including:-

Plotting of reservoir water level rate of rise to provide a prediction of when trigger

levels will be reached, spillway discharges to commence, plotting of rainfall to

identify if the storm event is still developing or has passed; and

Obtaining overall rainfall totals for the site. RSAS Output/Readings Guide

RSAS Output/Readings Possible Interpretation

Reservoir Water Level

Rapidly falling reservoir water level (>0.2m per hour). Dry Weather (no rainfall recorded)

Sunny Day failure

Rapidly rising reservoir water level (>0.5m per hour). High rainfall recorded or BOM indicates high rainfall in the area

Storm inflows to dam occurring;

Rapidly declining reservoir water level and high rainfall recorded

Breach / failure developing or has occurred.

Rainfall Gauge

Rapid Rise in Rainfall High intensity rainfall event occurring over the dam.



pg. 77

Automatic SMS alerts

The following pre-set levels are programmed to send an SMS trigger message to the DEWS RSAS Notification telephone list below and HydroScot.

Storage Levels

EL 879.35 m Main Spillway Crest Level (Reset 879.15 m)

EL 879.45 m ALERT level

EL 879.75 m LEAN FORWARD level EL 880.00 m STAND UP level

EL 880.30 m Main Embankment Crest Level

DEWS RSAS Notification telephone list for SMS messages

The Bureau of Meteorology

The Bureau of Meteorology website is www.bom.gov.au.

Accessing and Recording Rainfall data

There is a BOM weather station located in Applethorpe, that provides 30 minute rainfalls, however data is only updated every hour on the 30 minute mark.

http://www.bom.gov.au/



pg. 78

Accessing and Recording Brisbane Weather Watch Radar data

The Brisbane Weather Watch Radar image covers Glen Niven Dam catchment area.

Hover the curser over “Rain Radar” Icon, in the middle of the home page, to the right of the

Australia map and left click.

Left click the red triangle immediately left of the “Brisbane” location, select “256km Mt Stapylton Radar Loop” Scale, ensure “Locations” and “weather observations” Tabs under Map Features Legend are ticked.

Analyse radar data for Stanthorpe area. Note location of Glen Niven Dam catchment in Appendix 3. Moderate and Heavy falls for sustained periods of time will require close monitoring.

To access 30 minute rainfall totals from 9am

Click the ‘Weather observations’ box in Map Features bottom right hand side of radar screen

Hover curser over “Applethorpe” weather station on the 128 km or 256km radars

Double left click the station and the rainfall totals from 9am will appear (shown below)



pg. 79

Rainfall depths for lean forward EAP activation

The following rainfall depths have been developed to assist with the activation of the EAP;

Triggers for lean forward activation;

34mm in 15 mins

40mm in 30 mins

55mm in 1 hour


If these rainfall depths are experienced within the above timeframes, the EAP should be activated and

rainfall, dam and weather conditions should be monitored closely for any storage level rises and outflows

from the dam.



pg. 80

Appendix 7 – Spillway Rating Tables and Flood Duration Curves

Dam Volume

Spillway rating curve

872

873

874

875

876

877

878

879

880

881

882

0 50 100 150 200 250 300 350 400

Sto

rage

Lev

el E

leva

tio

n (

mA

HD

)

Volume (ML)

Dam Volume

879.2

879.4

879.6

879.8

880

880.2

880.4

880.6

880.8

881

0 50 100 150 200 250

Sto

rage

Lev

el E

leva

tio

n (

m)

Discharge from the dam (m3/s)

Spillway Rating Curve

Dam Crest Level

Dam Crest Level



pg. 81

Sunny Day Failure

Breach development and peak – 30 mins

Flood duration – 1 hour 30 mins

Flood Failure

Breach development and peak – 1 hour 30 mins

Flood duration – 4 hours



pg. 82

Flood Failure



Flood Failure





pg. 83

Appendix 8 – Inundation Mapping

Sunny Day Failure



pg. 84

5% AEP Flood Failure Inundation (1 in 20 AEP)



pg. 85

0.1% Flood Failure Inundation (1 in 1000 AEP)



pg. 86

0.005% Flood Failure Inundation (1 in 20,000 AEP)



pg. 87

PMP Dam Failure Inundation



pg. 88

Appendix 9 – Critical Reservoir Water Levels and Trigger Justification

EAP Activation triggers, discussion and justifications

The catchment area of Glen Niven Dam is relatively small and the travel time for flood to impact downstream residents is approximately 1.0 hour. Therefore, there is potential for the peak of events to occur and escalate quickly within a limited time, being as short as 1 hour 30 minutes. Due to this reason both the Alert and Lean Forward triggers have been set in the earlier stages of a developing event to ensure sufficient lead time is provided to both Counter Disaster Groups and PAR.

The Stand Up trigger is set to provide sufficient time for orderly evacuations for a worst possible event and to also reduce the need for frequent unnecessary evacuations.

Refer to attached table, EAP Triggers, Critical Water Levels and Impacted Features/Actions.

Individual Activation triggers

Routine spillway flows, Activation Trigger Justification Allows for small to medium downstream releases from the dam without activating the EAP – monitoring of the dam increases. Border and Aerodrome Roads may be inundated.

Alert, Activation Trigger Justification

Early enough to provide sufficient time for LDMG to make considerations regarding future resources. PAR may be notified via an advice notification at this stage depending on the circumstances. If the event is unlikely to progress into lean forward the advice will not be sent to reduce message fatigue.

Lean Forward, Activation Trigger Justification

PAR are notified at this point, provides time for PAR to prepare for evacuation.

Stand Up, Activation Trigger Justification

Provides time for PAR evacuation before the reservoir water level reaches the embankment crest and overtopping commences.

Stand Down, Activation Trigger Justification

Set low enough to ensure any event is over and reactivation of EAP is unlikely

Ensures all impacted features are no longer affected.



pg. 89

EAP Triggers, Critical Reservoir Water Levels and Impacted Features/Actions

Alert Status Reservoir Water Level (m)

Dam Downstream Release (M3/s)

AEP Approx. (1 in x years)

PAR (nominal)

Impacted Features/ actions

FSL 879.35 - 0

Routine Spillway Flows 879.35 to 879.45 Frequent 0 May impact Border Road

and Aerodrome Road

Alert 879.45 to 879.75 Frequent 0 PAR notified based on

event circumstances

Lean Forward 879.75 to 880.0 5 - 10 0 PAR notified

Stand Up 880.0 10 - 20 0 PAR Evacuations

Dam Crest EL 880.3 10 - 20 3 Overtopping imminent

Larger event than

20,000

Above 880.8 >20,000 14.5 Embankment likely to

have failed

Stand Down Below 879.4



pg. 90

Appendix 10 – PAR Evacuation Plan



pg. 91

Appendix 11 – Riparian and Downstream Water Users (RDSWU) Locality Map



pg. 92

Appendix 12 – Burst SMS Sending messages

Purpose

This document outlines the standard operating procedure required in order to send emergency

messages using Burst SMS. The purpose of the messages is to send notification and warning texts

messages to preloaded recipient groups.

Process

1) Log into Burst SMS, www.burstsms.com.au

The Login button is in the top right hand side of home page

In the login page enter your email address and password, then press login.

2) To send an SMS

Select SEND SMS tab

Ensure the To Contact List is correct for the target Dam, in this case Glen Niven and the

Activation Status



pg. 93

Left Click the Templates tab to display available preloaded messages (shown above).

Select the appropriate message by left clicking from the field depending on the correct Event

and Status, ensuring the prefix of the template starts with Glen Niven (shown below).

Carefully review the content of the draft message in the simulated phone image on the right

hand side.

Some messages have various options that require final editing

Ensure to edit UPDATE field, time for the next update and editing for am/pm



pg. 94

Click on the NEXT button on the bottom of the screen (shown above)

The next page is the final check and send. Check the To Target Group and simulated

message, if all correct press SEND.



pg. 95

Sent Message Reporting



pg. 96

In the main menu select Activity Tab

Check the details on the required message, time & date & target group

Check status to confirm the status of all the sent messages

Check for any responses, if more than 0, left click to see who replied and the response.

Left Click on the Report

Delivered means the message has been delivered to the recipient’s handset

Pending The message has been delivered to the carrier and they are attempting to deliver it

to the handset, no form of delivery receipt has been received. This could mean the phone is

off or out of range. If unsuccessful for 72 hours it will be marked as soft bounced.

Soft Bounced The message has timed out after 72 hours, either the phone was turned off or

out of range or the message was unable to be delivered due to a network outage or other

connectivity issue.

Hard bounced the message failed due to the number being invalid or disconnected

Examples of previous messages sent



pg. 97

Appendix 13 – Glen Niven Dam Drawings



pg. 98

Appendix 14 – Training EAP Training exercises shall be organised by the TLNCA. These shall include NCA officers, DI Officers and the appropriate Disaster Management Group personnel.

A record is to be kept in the table below.

Officer EAP Role Dam Safety

Training Glen Niven

EAP Training Scenario Training

EEC July 2014 Nil October 2015 (Crooks Dam)

EEC

Backup 1 July 2014 Nil

October 2015 (Crooks Dam)

EEC

Backup 2 October 2015 Nil

October 2015 (Crooks Dam)

EEC

Back up 3 2012 Nil Nil

TLNCA Nil Nil Nil

DNCA 2012



pg. 99

Appendix 15 – Emergency Event Coordination

EEC Emergency Event Coordinator

DNCA Director, Non Commercial Assets

TLNCA Team Leader, Non Commercial Assets

The RSAS system will send an SMS message to the nominated EEC’s, TLNCA, DNCA alerting that

an event has been triggered and at which dam.

The host system will send a message (based on trigger reached) to the Water Supply Regulation On-

Call Officer (1300 596 709) to alert it that an event has occurred and at which dam.

The Water Supply Regulation On-Call Officer will telephone the EEC for that dam, as per Table 1, and confirm that the Officer is coordinating the event.

If the EEC cannot be contacted, the Water Supply Regulation On-Call Officer is to contact in order of

priority (1) TLNCA (2) DNCA and advise that the EEC cannot be contacted.

The TLNCA / DNCA will appoint an alternative EEC officer as the Emergency Event Coordinator.

Table 2 is to be updated when officers go on leave, and distributed to the EEC’s, TLNCA, DNCA and

the Water Supply Regulation On-Call Register.

Emergency Event

Coordinator

Function Mobile Number Home Number

Note: Nominated backup will be determined by TLNCA.



pg. 100

Appendix 16 – Dam failure emergency alert request

QFES emergency alert request guidelines

An Emergency Alert Request form should be completed, if required (see Tables 5 to 44 for actions),

and sent to the SDCC Watch Desk in order to activate the Glen Niven Dam Emergency Polygon.

Instructions

This form is not to be used for Flood UNLESS a flood has triggered a dam failure hazard.

Print off the following QFES Emergency Alert Request form.

Telephone the SDCC Watch Desk on 07 3635 2387 or 0408 190 872 and tell them your

intention to use the Emergency Alert for a dam failure hazard for Glen Niven Dam.

A KML Polygon for this dam is stored in the Disaster Management Portal in the Emergency

Alert area. Ask the SDCC operative to locate the polygon. It will be a KML file called Glen

Niven_Dam_Emergency_Polygon.

Give them your phone number, confirm their name, and end the call after advising the form

will be sent shortly.

EEC, TLNCA & DNCA will use pre-populated message below or 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 EEC, TLNCA or DNCA.

Phone back to check the message has been sent and ask for an email to confirm.

Use the following text to complete the emergency alert request:

Emergency Alert – Polygon text

FILE NAME dmportal/EA Library/Referable Dams/Glen Niven/Glen_Niven_Dam_Emergency_Polygon

VOICE MESSAGE (message should be less than 450 characters) 430

DEWS Warning. Failure of Glen Niven Dam likely. Dam located on four mile creek, 4 kms north east

of Applethorpe on the eastern side of New England Highway. Failure will produce flooding along four

mile creek. Residents along creek near Border road, Aerodrome road, Melaleuca crescent and

McKillop Lane are advised to evacuate to higher ground immediately. For more information tune to local ABC radio or call SDRC on 1300 697 372.

SMS MESSAGE (maximum of 160 characters including spaces) 146

Warning for residents along Four Mile Creek

Failure of Glen Niven Dam likely

Seek higher ground now if safe

More info ABC radio or SDRC 1300 697 372



pg. 101

Emergency Alert Request Form



pg. 102

Figure 3 - Glen Niven Dam Emergency Alert Polygon