Flood Risk Management Plan - Ergon Energy · 2019-12-20 · Flood Risk Management Plan Page i Version 1.1 Ergon Energy Corporation Limited ABN 50 087 646 062 | Energy Queensland Limited

Flood Risk Management Plan

2019-20

20 December 2019


Page i Version 1.1 Ergon Energy Corporation Limited ABN 50 087 646 062 | Energy Queensland Limited ABN 96 612 535 583 | Energex Limited ABN 40 078 849 055

Availability of the Flood Risk Management Plan This plan is available on the Energex and Ergon Energy websites www.energex.com.au and www.ergon.com.au.

For all enquiries regarding the Flood Risk Management Plan contact:

Michelle Bradshaw

Manager Emergency Planning and Response

Energy Queensland

Ph. (07) 4932 7472

Version Date Description

1.0 October 18 Initial combined Ergon Energy Network / Energex plan

1.1 December 19 Annual review and update

http://www.energex.com.au/

http://www.energex.com.au/


Page ii Version 1.1 Ergon Energy Corporation Limited ABN 50 087 646 062 | Energy Queensland Limited ABN 96 612 535 583 | Energex Limited ABN 40 078 849 055

CONTENTS 1 Purpose and Scope ........................................................................................................... 4

1.1 Purpose ..................................................................................................................................... 4 1.2 Scope ........................................................................................................................................ 5

1.3 Definitions, Abbreviations and Acronyms ................................................................................. 5

2 Our Assets ........................................................................................................................ 7

3 Identifying Flood Prone Areas ........................................................................................... 7

3.1 Mapping .................................................................................................................................... 7

3.1.1 Flood Mapping.............................................................................................................. 7

3.1.2 Department of Natural Resources, Mines and Energy Error! Bookmark not defined. 3.2 Weather Forecasting and Support Services ............................................................................. 8

4 Asset Management ........................................................................................................... 9

4.1 Asset Records ........................................................................................................................... 9

4.1.1 Asset Register .............................................................................................................. 9 4.1.2 Geographical Information System ................................................................................ 9

4.1.3 Field Mobile Computing Inspection Systems ............................................................... 9

4.2 Asset Design and Mitigation ..................................................................................................... 9

5 Season Preparedness ..................................................................................................... 10

5.1 Risk Management ................................................................................................................... 10

5.2 Annual Review ........................................................................................................................ 11

6 Emergency Planning ....................................................................................................... 11

6.1 Emergency Management Plan ................................................................................................ 11

6.2 Business Unit Emergency Support Plans ............................................................................... 12

6.3 Regional Planning Information ................................................................................................ 12

6.4 Confirming Critical Installations and Infrastructure ................................................................. 12

7 Emergency Response ..................................................................................................... 13

7.1 Flood Warnings ....................................................................................................................... 13

7.2 Pre-emptive Isolation of Network Assets ................................................................................ 13

7.2.1 Priority List for Pre-Emptive Disconnection and Reconnection ................................. 14

7.2.2 Mobile Generation ...................................................................................................... 14 7.2.3 Underground Network Assets .................................................................................... 14

7.2.4 Overhead Network Assets ......................................................................................... 15

7.2.5 Streetlights ................................................................................................................. 15


Page iii Version 1.1 Ergon Energy Corporation Limited ABN 50 087 646 062 | Energy Queensland Limited ABN 96 612 535 583 | Energex Limited ABN 40 078 849 055

7.2.6 Individual Premises .................................................................................................... 16 7.3 Restoration of Network Assets ................................................................................................ 16

7.3.1 Padmounts, Ground Transformers, Ring Main Units and Dry Type Transformers .... 17

7.3.2 Pillars .......................................................................................................................... 17

7.3.3 Underground Cable Routes ....................................................................................... 17

7.3.4 Overhead Network Assets ......................................................................................... 17

7.3.5 Streetlights ................................................................................................................. 17 7.3.6 Individual Premises .................................................................................................... 18

7.3.7 Metering ..................................................................................................................... 18

8 Communications ............................................................................................................. 18

8.1 External Organisation Liaison ................................................................................................. 18

8.2 Community Safety Awareness and Media Engagement ........................................................ 19

9 Event Reporting .............................................................................................................. 20

Appendix A – Mobile Generation ................................................................................................... 21


Page 4 Version 1.1 Ergon Energy Corporation Limited ABN 50 087 646 062 | Energy Queensland Limited ABN 96 612 535 583 | Energex Limited ABN 40 078 849 055

1 PURPOSE AND SCOPE

1.1 Purpose

Many of Queensland’s towns and cities are located predominantly within catchment areas, along major waterways and the east coast areas.

Queensland has many climatic zones across the state resulting in numerous storms, tropical lows and cyclones. The increase in rainfall and run off from these systems can have an immediate or delayed impact on population centres and electrical assets.

Energex and Ergon Energy Network, as part of the Energy Queensland Group apply best practice asset management strategies to ensure the safe and reliable operation of its networks. This Flood Risk Management Plan is a subset of the Summer Preparedness Plan and targets issues, initiatives and management processes relating specifically to floods.

The key components of this plan are to ensure the safety of the community in the event of damage or impact, manage and minimise the risk to network assets, improve response and maintain customer supply.

PETER PRICE Executive General Manager Strategy, Asset Safety & Performance

PAUL JORDON Executive General Manager Distribution



1.2 Scope

When constructing new or replacement assets, flood inundation is a key design consideration. In addition, we will effectively mitigate and manage flood risk by addressing the following major areas:

• Proactive identification of electricity assets which may be affected by a major or moderate flood

• Asset maintenance and inspection procedures

• Identification of safe, pre-emptive disconnection and optimisation of switching

• Safe restoration of supply process and/or dispatch of generators

• Emergency planning and response to major floods • Review of business continuity plans

• Liaison and collaboration with other organisations regarding flood related issues, and

• Information to be provided to customers relating to flood risk and public safety.

1.3 Definitions, Abbreviations and Acronyms

BAU Business as Usual – resources and effort are focused on the planned and budgeted work required to operate and maintain electricity infrastructure, its operational functions and capabilities.

Disaster A disaster is a serious disruption in a community, caused by the impact of an event, that requires a significant coordinated response by the State and other entities to help the community recover from the disruption (definition: Disaster Management Act 2003, Section 13). NOTE: a disaster can only be declared by a Disaster District or the State Government with the specific approval of the responsible Minister.

Disaster Management

Disaster management means arrangements about managing the potential adverse effects of an event, including, for example, arrangements for mitigating, preventing, preparing for, responding to and recovering from a disaster (definition: Disaster Management Act 2003.

Disruption Events Events that disrupt the normal functions of businesses, the economy and/or communities and include those that are man-made (e.g. terrorist attack, bomb threat) and natural (e.g. storm, cyclone, fire, flood, network or non-network asset failure, influenza pandemic).

Emergency A sudden and unexpected event that disrupts the normal operating functions, capabilities, resource and/or people of the organisation and requires an immediate response to prevent escalation of its scale or severity. For example, but not restricted to:

• Localised electricity network damage, or potential damage, due to fire, flood, storm or accident etc.;

• Loss of operating facilities and/ or resources; • Loss of ICT operating systems.



Flooding-Major In addition to the criteria for moderate flooding, extensive rural areas and/or urban areas are inundated. Properties and towns are likely to be isolated and major traffic routes likely to be closed. Evacuation of people from flood affected areas may be required

Flooding-Minor Causes inconvenience. Low-lying areas next to watercourses are inundated which may require the removal of stock and equipment. Minor roads may be closed, and low-level bridges submerged.

Flooding-Moderate In addition to the criteria for minor flooding, the evacuation of some houses may be required. Main traffic routes may be covered. The area of inundation is substantial in rural areas requiring the removal of stock.

Flooding-Q100 Refers to a flood level or peak that has a one in a hundred, or 1%, chance of being equaled or exceeded in any year (also referred to as annual exceedance probability)

Hazard An event, object or scenario that has the potential to cause harm to people and/or cause damage to property or assets.

IPC Insulation Piercing Connector

LiDAR Light Detection and Ranging, is a remote sensing method that uses light in the form of a pulsed laser to measure ranges which are transformed to measurements of actual three-dimensional points of the reflective target in object space. LiDAR produces mass point cloud datasets that can be managed, visualised, analysed, and shared using ArcGIS.

Level 1 Emergency Events are routine incidents that are managed as part of normal business operations and are not managed through emergency, crisis or business continuity management arrangements.

Level 2 Emergency These events are the first level of non-routine events. They are more complex either in size, resources or risk; and are events that are beyond the capability of normal business operations and require specific command and control arrangements. E.g. Impacts to EQL’s normal operations may be substantial but may be relatively foreseeable and contained.

Level 3 Emergency These events are the most significant emergencies. They require substantial effort and resources across different regions / areas of EQL and have the potential to substantially disrupt business operations or significantly harm EQL’s reputation. These emergencies require specific command and control arrangements and resourcing to a much greater degree than a level 2 event.

Risk Potential impact on objectives (either losses or opportunities) due to a particular event, hazard or scenario. Risk is the product of likelihood and consequence.

http://www.bom.gov.au/water/awid/id-338.shtml



2 OUR ASSETS

Energex and Ergon Energy Network operate in a vast area with its distribution network covering an area of 1.7 million square kms. This consists of approximately 247,293 km of overhead and underground high voltage and low voltage distribution power lines and 1.7 million poles.

The high voltage network operates at a variety of voltages ranging from 220kV, 132kV, 110kV, 66kV, 33kV, 22kV, 19.1kV, 12.7kV, and 11kV. The low voltage network is reticulated at 415/240 Volts.

The networks include 33 isolated power stations, 72 bulk supply points and 571 zone substations.

3 IDENTIFYING FLOOD PRONE AREAS

To identify major and moderate flood risk areas, we utilise information from a variety of sources in addition to our own network and asset data. These sources provide critical information to assist in planning, preparation and response activities in key areas.

Current flood modelling practices rely on the data and information collected from previous flood events to determine and develop Defined Flood Levels (DFLs). These DFL’s and associated modelling then form the basis of town planning, emergency response and business continuity planning. The models are reviewed and DFL’s revised based on the information available from subsequent events.

The information is essential and can be shared and utilised within the business to assist in the planning, preparation and subsequent response to events. It is important to recognise that due to changing infrastructure and urban development, water courses, run off and drainage changes, the flow of water may also alter and affect previous data validity.

3.1 Mapping

3.1.1 Flood Mapping

Our Geographical Information System (GIS) databases are regularly updated to allow risk maps to be produced identifying network assets in the flood prone areas and allow visibility of equipment which may be affected both prior to and during flood events including:

• Bulk and zone substations

• Commercial and Industrial substations



• Overhead lines

• Padmount and ground transformers

• Underground pillars, and

• Streetlights.

In South East Queensland, major flood data layers have been recorded for the Brisbane and Bremer rivers and information from the regional councils assist to document local flood levels. Additional flood layers covering moderate flooding for the Brisbane, Gold Coast, Logan, Moreton Bay and Gympie river systems are also available for operational purposes.

Flood data is also available for the South Western Region, Rockhampton, Bundaberg and Maryborough areas. Data continues to be consolidated for other major regional centres including Mackay, Townsville and parts of Far North Queensland.

3.1.2 Flood Data Collection Sources

Storm surge and inundation information collected during flooding across Queensland depot areas is integrated into our network flood mapping and modelling. Information sources include:

• Localised experience

• Independent assessments

• Open source interactive mapping for use by the public from:

o Local Councils

o Queensland State Government agencies

o Department of Natural Resources, Mines and Energy.

3.2 Weather Forecasting and Support Services

The Bureau of Meteorology (BOM) provides specific seasonal outlooks, rainfall predictions and weather warnings.

To assist in the provision of warnings, the BOM use three common definitions for flood levels. The levels of minor, moderate or major flood are sourced from key river height stations. The classifications are used to highlight certain impacts of the flood both upstream and downstream of the gauges. The classifications are reviewed as appropriate by the BOM.



We also engage a dedicated weather service provider to provide specialist weather advice on forecast weather patterns including tropical lows, storms and flooding.

4 ASSET MANAGEMENT

4.1 Asset Records

In order to maintain an up-to-date record of our asset information, the following management tools are utilised.

4.1.1 Asset Register

An equipment register is maintained to store technical information, maintenance history, and the life cycle of power assets.

This register also allows planned work to be programmed to check conditions, undertake repairs and record completion.

4.1.2 Geographical Information System

The Geographical Information System (GIS) contains core asset data to enable the retrieval of relevant information and display it visually including the physical location, layout of the assets, specifications, the types and lengths of overhead lines and underground network.

4.1.3 Field Mobile Computing Inspection Systems

Our teams utilise field mobile computing systems in the routine inspection and maintenance of poles and line components. The system enables asset inspectors to issue work, locate poles, validate the pole details, record any inspection measurements or data required, confirm asset defect work orders and raise new defect work orders. This information is retrieved and integrated into the asset register and GIS systems to ensure an accurate record of asset history, condition and inclusion in defect rectification or replacement programs.

4.2 Asset Design and Mitigation

We design the electrical network to maximise reliability, safety, performance and shareholder value over the long term (commensurate with the life expectancy of network assets) whilst meeting community expectations for environmental impact and regulatory requirements.



The design and construction of new power lines considers flood risk mitigation opportunities. Identification of flood risk areas enables better planning and a capacity to avoid areas of inundation or reduce the risk to assets through improved route and placement.

Asset standards have been developed to ensure the network and its equipment are designed to the appropriate engineering standards, of a suitable design and configuration to meet the needs of the customer for an efficient and reliable delivery of supply, and that the asset is of a quality to gain maximum benefit of robustness and length of life cycle.

Planning and design consider potential installation of mitigation measures including permanent or temporary bunding, barriers around key substation equipment, sealing wall and floor penetrations in substation buildings to withstand a major flood event, raising ground pad mounted transformers on plinths or the relocation of critical substation assets above flood levels. 5 SEASON PREPAREDNESS

5.1 Risk Management

We constantly review inherent and emerging network risks to ensure optimisation of our projects and programs. A Natural Hazards Risk Register and profiling includes the identification and mitigation of risk associated with Flood Events and is reviewed in conjunction with relevant authorities’ advice and notices.

Figure 1: Risk Management Overview

Risk assessment involves development of credible scenarios that may lead to a specific risk consequence. This is followed by estimation of the likelihood of occurrence and subsequent



development of a risk rating for each scenario. Projects and programs of work are then considered for inclusion in the program of work on a priority basis to deliver appropriate network-wide risk appetite outcomes.

5.2 Annual Review

This Flood Risk Management Plan is reviewed on an annual basis. Detailed flood planning documents are continually reviewed for critical river systems and key critical infrastructure at risk. 6 EMERGENCY PLANNING

Each natural disaster can present different challenges to the electricity network, which require specific responses. The main priorities during an emergency are:

• Safety of employees and the community

• Identifying the number of customers affected and the impact on the community.

• Identifying the extent of damage

• Isolation and safe restoration of supply.

The safety of personnel and the community is paramount. Our staff will not put themselves at risk either during or immediately following a flood. Our staff will follow the direction from Emergency Services personnel before moving into an area subject to flooding or wait until flood waters have receded and structures deemed to be safe to enter.

We will respond to incidents, including flood, through a standard emergency response escalation framework. This includes appropriate escalation for improved command and control, inspections, assessment of damage and restoration. This framework provides escalation for minor storm and flash flooding through to more severe impacts.

A major prolonged flood with potential to affect one or multiple areas across the state would activate the Emergency Management Plan (EMP) as a Level 3 Emergency and be communicated by an alert system.

6.1 Emergency Management Plan

The Emergency Management Plan (EMP) details the framework and processes to be applied by our two Distribution network companies, Energex and Ergon Energy Network, when preparing for and responding to a Level 3 Major Emergency event which disrupts or has the potential to disrupt the supply and distribution of electricity or the provision of related services to customers and



communities. The EMP details additional information to assist in a large scale response to a major flood.

The response is managed within an escalation process that increases resource capabilities and coordination, drawing across regions as required to meet the requirements in the impacted area.

During a major flood event, various staff have specific responsibilities. Role statements and checklists have been prepared to assist staff to ensure key considerations and preparations are completed. These roles statements, including flood specific items are included in the Emergency Management Plan.

6.2 Business Unit Emergency Support Plans

Prior to the summer storm season, our business units review their Emergency Support Plans to ensure readiness for the season ahead. A particular focus is placed on the following areas that directly support emergency response activities:

• Network Operations Control Centres

• Customer Contact Centre and Works Dispatch

• Customer, Community and Corporate Affairs

• Asset Safety and Performance

• Supply, Fleet and Generation.

6.3 Regional Planning Information

Separate operational plans have been developed for the Northern, Southern and South East regions within the two Distribution network companies. These plans identify critical sites, community assets and flood height data, allowing field staff to isolate or redirect the electricity supply to ensure safety of the community or maintain supply without risk of inundation. This local knowledge, experience and insight are key to the effectiveness of our mitigation plans.

6.4 Confirming Critical Installations and Infrastructure

There are a number of locations throughout the network where electricity supply is considered more critical to the health and wellbeing of the general community. These installations include hospitals, life support systems, water supply pumping stations, sewerage pumping stations and communications infrastructure.



Listings of these installations are kept with the Energex and Ergon Energy Network Control Centres and Emergency Planning and Response team, and are updated annually in conjunction with operational teams, Area Managers, Local/District/State Disaster Management Groups, and other emergency services groups. Restoration of supply to these locations is given higher priority during emergency events to ensure essential services are provided to the community as soon as safely possible.

7 EMERGENCY RESPONSE

7.1 Flood Warnings

Network Operations Controllers, regional operational staff, and our Emergency Planning and Response team monitor storm and flood events using information from various organisations including BOM, disaster management groups, local councils hydrologists, water agencies and flood modelling experts.

Network Operations have access to various Flood Management systems, which include rainfall stations, river and creek gauges across the state. The system can also provide information on roads and areas which are in flood.

When moderate to major flood warnings are issued on rivers and creeks, the Network Control Shift Coordinator will escalate the situation and alert the Regional Network Managers and operational Area Managers of the flood warning. A dedicated Emergency Management Team will be convened as required for Level 2 and 3 emergencies relating to flood events.

Emergency Managers will coordinate the tasking of planning teams and field crews to commence river height monitoring using the BoM website, Weather Watch, Floodwise system and/or SES information and commence preparing for the flood response. Specific preparations may include the movement of crews, fleet, generation and equipment to areas expected to be isolated by floodwaters.

7.2 Pre-emptive De-energisation of Network Assets

Areas known to succumb to inundation have been reviewed and identified for potential de-energisation before the waters rise to unsafe or inaccessible levels. This process ensures an increased level of safety for the public, potential reduced damage from water ingress and improved response times.

Key distribution electrical assets which were impacted by previous major flooding the 2011, 2013, 2017 and 2019 flood events in regional cities including Rockhampton, Toowoomba, Bundaberg, Dalby, Fraser Coast, Townsville and Far North Queensland have been recorded and identified for



consideration in the event of or forecast of, a flood event. Similar lists are available along the South East Queensland River systems including Brisbane, Ipswich, Gympie, Gold Coast, Logan and Albert rivers.

7.2.1 Priority List for Pre-Emptive Disconnection and Reconnection

Our customer teams have identified critical and Life Support Customers that will be contacted prior to any pre-emptive isolation. Memorandums of Understanding (MOU) have also been developed with critical infrastructure agencies to ensure communication, disconnection and reconnection protocols are in place.

7.2.2 Mobile Generation

Our support teams have a fleet of generators available for use in an emergency flood event where they are not already connected to the network. These are listed at Appendix A.

Additional smaller generators (in range 30 kVA to 120 kVA) are available from local hire companies.

Where flooding has potential to interrupt supply to critical sites or groups of customers, generators may be mobilised on a priority basis as approved by Emergency Managers (including advice from Disaster Management Groups). Where there is a major flood and access to communities is likely to be inaccessible, generators will be considered for strategic early deployment.

Regional plans have been developed to identify and optimise switching points and generator connection points. Permanent connection points for HV generation are included in our GIS databases to assist in our planning considerations.

7.2.3 Underground Network Assets

The following guide is provided to assist in de-energisation of underground assets prior to actual inundation. All de-energisation of equipment and plant will be performed in a safe and coordinated manner that complies with our existing safe systems and practices:

Asset Type Actions

Zone Substations Rising flood waters will be assessed to determine any isolation required at potentially impacted substations.

Padmount Transformers

Power will be disconnected when the flood level is ~300 mm below the HV cable terminations and expected to rise further.



Ground Transformers Power will be disconnected when the flood level is at the base of ground transformers and expected to rise further (above ~300 mm). Note - Transformers with breathers will have the breathers removed and plugged to prevent the ingress of water.

Ring Main Units Power will be disconnected when the flood level is at the base of ring main units and expected to rise further (above ~300 mm).

Dry Type Transformers

Power will be disconnected when the flood level is at the base of the dry type transformer and expected to rise further. The temperature monitor will be removed from the transformer to aid in the restoration of the transformer.

LV Pillars Power will be disconnected when the flood level is at the base of pillars and expected to rise further. It is likely that the padmount transformer supplying the pillar will be disconnected before the flood level reaches the base of pillars.

Table 1 – Water levels for de-energisation

7.2.4 Overhead Network Assets

All overhead lines and apparatus from HV through to LV (including services) must be de-energised before the clearances from flood water are encroached.

Nominal System Voltage

(kV)

Major Flood Level – Large Catchments1

(m)

Major Flood Level – Small Catchments2

(m)

Up to and including 33 4.0 3.0

Above 33 - up to and including 132 4.5 3.5

Notes: 1. It is assumed in large catchments; the rivers will remain at major flood for a number of days and there will be

watercraft or emergency services vessels in the waterway. 2. It assumed that for small catchments, the creek rise and fall in short time (hours) and there will be no vessel or

craft in the waterway.

Table 2 – Clearances Over Waterways for Uninsulated Energised Crossings

7.2.5 Streetlights

To prevent damage and replacement, streetlights may be disconnected during a flood event.



7.2.6 Individual Premises

Where possible and where time permits, power may be disconnected, and meters removed from individual premises before switchboards are flooded.

7.3 Restoration of Network Assets

The restoration of Energex and Ergon Energy Network assets will be undertaken in accordance with standard business processes, and the following specific processes during flood events. This is critical to ensure the assets are returned to a safe condition prior to re-energisation and prevent possible further damage or impact to customers.

Type Title Overview

Ergo

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Gui

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nd M

anua

ls Installation Assessment /

Network Re-energisation After a Natural Disaster Guideline –(BS001404R135)

Provides guidelines for the examination of installations affected by structural damage, rainwater, flood inundation or fire, prior to re-energising the Low Voltage Overhead or Underground Network

Re-energising water inundated plant –(BS001404R136 Ver 1)

Provides direction for re energising underground assets which have been inundated by water.

Disconnection and Reconnection of Installations Guideline (SD0101R02 Ver 4)

Provides a standard for the disconnection and reconnection of an installation.

Ener

gex

Wor

k Pr

actic

es

Re-energisation of Flood Affected Ground Mounted Distribution Equipment (WP – 1134)

Details the procedures to be followed prior to re energising ground mounted distribution plant such as ring main units (RMU’s), transformers, high voltage metering units, cable terminations, and low voltage (LV) equipment which has been inundated by flood water.

Installation Disconnection and Reconnection Procedure after Natural Disaster (WP – 1133)

Details the procedures to be followed by personnel for the removal of Energex assets and the safe disconnection and restoration of electrical installations during a natural disaster. Either before the event to protect Energex assets, or after the event where the



installation has suffered structural damage i.e. rainwater, flood inundation, bushfire etc.

Re-energisation of Flood Affected Pole Transformers (WP – 1132)

Details the procedure to be followed by personnel prior to re-energisation of pole mounted distribution transformers in areas that have been inundated by flood water.

7.3.1 Padmounts, Ground Transformers, Ring Main Units and Dry Type Transformers

Flood affected transformers and their ancillary equipment will be hosed, dried and the insulation and oil tested in accordance with the manufacturer’s recommendations prior to re-energisation.

If water ingresses into the oil of Ring Main Units, the oil will be replaced and the RMU tested in accordance with the manufacturer’s recommendations prior to re-energisation .

7.3.2 Pillars

Flood affected pillars will be inspected individually and hosed out if necessary.

• Without IPCs, a minimum insulation resistance of 100 MΩ at 2.5kV for 1 minute between each phase and phase to neutral will be achieved before re-energisation.

• With IPCs, a minimum insulation resistance of 5 MΩ at 2.5kV for 1 minute between each phase and phase to neutral will be achieved before re-energisation.

7.3.3 Underground Cable Routes

Underground cables which traverse along river banks may become exposed during a flood event. To reduce further damage, an inspection of the underground cable route will be arranged when safe to do so.

7.3.4 Overhead Network Assets

Structures (towers, poles and pole transformers) which are located in flood plains and have been flood affected will be inspected to ensure structural components have not been damaged and the foundation has not been compromised.

7.3.5 Streetlights

When supply is restored to an area, patrols will be initiated to check whether the streetlights have been impacted by the flood. Where required, individual streetlights may need to be inspected.



7.3.6 Individual Premises

Power will be disconnected and where possible Energex / Ergon Energy Network meters removed before switchboards are flooded. Note that other metering provider owned meters are not to be removed unless explicitly advised by that metering provider.

Solar PV systems will be considered as “live” during sunlight hours. The PV systems will need to be disconnected if the equipment is at risk of flooding. Any flood affected wiring, switches and inverter will also be treated as “live”.

On premises with obvious impact by flooding, switchboards and wiring will be inspected individually, and an insulation resistance test performed prior to re-energisation.

Where properties cannot be reconnected due to flood damage, Energex and Ergon Energy Network will work with external organisations (eg Master Electricians Australia) to assist residential customers with the restoration of electrical supply. Master Electricians Australia may coordinate an electrical contractor to assess the damage and effect repairs (which may be temporary).

Reconnection will not occur until formal advice is received from a licensed electrical contractor that the installation is deemed safe.

7.3.7 Metering

Where Energex and Ergon Energy Network owned customer meters have been proactively removed from site they can then be reinstalled back at that same site by Energex and Ergon Energy Network crews.

If the meters in a Power of Choice designated area are damaged, Energex or Ergon Energy Network staff will issue a Meter Fault Notification and take appropriate action (eg bypass) to reinstate supply. The meter owner will be informed and perform appropriate replacements. 8 COMMUNICATIONS

8.1 External Organisation Liaison

We have responsibilities under the Disaster Management Act to ensure adequate liaison occurs with emergency services and endeavour to provide representatives to all three Disaster group levels at Local, District and State. To ensure proper consultation and coordination in relation to flood events, we have representation on the following committees:

• State Disaster Coordination Group (SDCG) or State Incident Management Team (SIMT);

• District Disaster Management Groups (DDMG);



• Local Disaster Management Groups (LDMG)

It is vital during a major event that close contact be maintained with all emergency services, in particular QFES, Queensland Police Service (QPS), the State Emergency Service (SES) and local disaster management groups. In a potential major flood event, an Energex and Ergon Energy Network liaison officer will be located at the State or relevant Local or District Disaster Coordination Centre.

Other organisations engaged include Health (Hospitals and Aged Care), Council (Water and Sewerage), Evacuation and Recovery Centres, Business / Community Groups impacted, Logistics, Defence, Main Roads, Telecommunications,

Dedicated liaison officers are nominated annually for each disaster management organisation.

8.2 Community Safety Awareness and Media Engagement

The Community Powerline Safety Plan has been developed to raise public awareness of electrical hazards, our approach to safety and potential hazards, how target groups are identified and provide precautions to avoid electricity incidents.

The Community Powerline Safety Plan details the strategic projects that have been designed to create greater awareness in response to an analysis of risk and incident reports. These projects target the public to help raise their awareness of the hazards they face through their interaction with the Energex and Ergon Energy networks.

Where appropriate the Community Powerline Safety Plan provides advice to the public on the following flood related issues including:

• Measures to mitigate the effects of flooding on our network.

• What to do when damaged infrastructure is identified.

• Raising awareness of the dangers the electricity network may pose to the community and emergency services personnel.

Customers and other members of the public can access the Community Powerline Safety Plan and other information from the Energex and Ergon Energy websites. The websites contain information on a variety of topics including:

• Preparing for floods; and

• What to do in an emergency.

It is critical to assist the community and increase awareness of the consequences of flooding on the network. In the lead up to the storm season, Energex and Ergon Energy Network conduct a suite of public awareness campaigns outlining the flood mitigation measures where required. This is enhanced through online media, traditional media and other forms of mass media.



The Network Operational Control Centres and Contact Centre are the central points for receiving reports of incidents or faults and the dissemination of information to the responsible regions.

9 EVENT REPORTING

Post event debriefs and reviews are conducted on all escalated and emergency events to ensure information is documented and opportunities for improvement identified.

Formal investigations may occur where there has been major damage to critical assets.

Results from reviews, incident investigations and any feedback received from stakeholders will be integrated into future reviews of the Flood Risk Management Plan and associated procedures. Additional data insights are incorporated into GIS flood mapping and models.



APPENDIX A – MOBILE GENERATION

The following mobile generation is located across Queensland and may be available for use in an emergency event.

Additional mobile generation assets may be hired from external providers using pre-arranged agreements for emergencies. These will be subject to availability. Ergon Energy Network

Genset_ID GENERATOR SIZE kVA

Location Additional Details (generator controller)

MG-33-001 33 Cairns Skid mounted, Black changeover

MG-60-001 60 Cairns Trailer mounted, InteliGen

MG-60-002 60 Townsville Trailer mounted, InteliGen

MG-60-003 60 Mackay Trailer mounted, InteliGen

MG-60-004 60 Bundaberg Trailer mounted, InteliGen

MG-60-005 60 Rockhampton Trailer mounted, InteliGen

MG-60-006 60 Toowoomba Trailer mounted, InteliGen

MG-150-001 150 Cairns Skid mounted, InteliGen

MG-150-002 150 Cairns Skid mounted, InteliGen





MG-150-007 150 Maryborough Trailer mounted, InteliGen


MG-300-001 300 Maryborough Trailer mounted, InteliGen






MG-300-007 300 Gladstone Trailer mounted, InteliGen

MG-300-008 300 Bundaberg Trailer mounted, InteliGen






MG-500-006 500 Mackay Trailer Mounted, InteliGen



MG-625-001 625 Cairns Container, InteliGen

MG-625-002 625 Cairns Container, Inteligen

MG-1250-001 1250 Thursday Island Container, InteliSys



MG-1250-004 1250 Townsville Container, InteliSys

MG-1250-005 1250 Mackay Container, InteliSys

MG-1250-006 1250 Toowoomba Container, InteliSys

MG-1250-007 1250 Mt Isa Container, InteliSys

MG-1250-008 1250 Alpha Container, InteliSys

MG-1250-009 1250 Cairns CAT container

MG-1250-010 1250 Cairns Cummins Container, InteliGen

MG-1250-011 1250 Cairns Cummins Container, InteliGen

PEG-1500-001 1500 Cairns HV Injection Skid

PEG-1500-002 1500 Toowoomba HV Injection Skid

PEG-1500-003 1500 Mackay HV Injection Skid



Energex Network Genset_ID GENERATOR

SIZE kVA (all trailer mounted)

Location Additional Details (generator controller)

604 60 Geebung Depot Comap InteliVsion 5

606 60 Caboolture Depot Comap InteliVsion 5

607 60 Boonah Depot Comap InteliVision 5

608 60 Southport Depot Comap InteliVision 5

609 60 Gympie Depot Comap InteliVision 5

610 60 Gatton Depot Comap InteliVision 5

611 60 Maroochydore Depot Comap InteliVsion 5

612 60 Greenslopes Depot Comap InteliVision 5

613 60 Beaudesert Depot Comap InteliVision 5

614 60 Greenslopes Depot Comap InteliVsion 5

1501 150 Geebung Depot Comap inteligen



5006 500 Kilcoy Sub Comap inteligen




5011 500 Esk Depot Comap inteligen




5017 500 Slacks Creek -Service provider \yard Comap inteligen

5018 500 Virginia – Service providers yard Comap inteligen




5026 500 Mt Cotton- Service providers yard Comap inteligen

5027 500 Mt Cotton- Service providers yard Comap InteliVsion 5

5028 500 Geebung Depot Comap InteliVision 5

5029 500 Mt Cotton- Service providers yard Comap InteliVision 5


5031 500 Mt Cotton- Service providers yard Comap InteliVsion 5

5032 500 Slacks Creek -Service provider yard Comap InteliVision 5

5033 500 Rocklea – Service providers yard Comap InteliVision 5



5036 500 Bli (North Coast)- Service providers yard

Comap InteliVsion 5

5037 500 Bli Bli (North Coast)- Service providers yard

Comap InteliVision 5



5040 500 Bli Bli (North Coast) – Service provider yard

Comap InteliVision 5

5041 500 Slacks Creek -Service provider yard Comap InteliVsion 5






MG1 1250 Kilcoy Sub Heinzmann Sitech

MG2 1250 Carole Park Sub Heinzmann Sitech

MG3 1250 Kilcoy Sub Heinzmann Sitech

MG4 1250 Bethania Sub Heinemann Sitech

MG5 1250 Nudgee Sub Heinemann Sitech

Documents

Flood Risk Management Plan - Ergon Energy · 2019-12-20 · Flood Risk Management Plan Page i Version 1.1 Ergon Energy Corporation Limited ABN 50 087 646 062 | Energy Queensland Limited