Earlwood to Summer Hill cable project

Community information sessions

Tuesday 21 June - Canterbury Hurlstone Park RSL Club

Thursday 23 June - Ashfield Civic Centre

3

Tonight’s session:

• Introduction to project team

• Two short presentations:

– Ausgrid overview, project need and project planning (Matthew Irla)

– What to expect during construction (Mayur Kulkarni)

• Questions, comments, feedback (community & project

team):

• Next steps:

- how your feedback will be used in the project planning

- project key dates

Replacing cables between Earlwood

and Summer Hill

Area Development Manager

Matthew Irla

5

Overview of electricity network

Ausgrid

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The Ausgrid network area

• 1.6 million customers – households

and businesses

• Network covers 22,275 square km

– 30,000 substations

– 48,000km of power lines and

– 500,000 power poles

• Building our network today would

cost an estimated $38 billion

• Currently owned by the NSW Gov.

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Existing cable route between Earlwood and Summer Hill

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Project need

• Existing cables:

– 33,000 Volt gas filled

– In service for approximately 50 years.

• Dedicated engineers to monitor cables

• Approaching end of service life:

– Reliability concern

33,000 Volt cable cross section

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What can we do?

1. Do nothing

2. Maintain and repair

3. Replace License requirements: To maintain a safe and reliable supply of electricity to our customers

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How we plan projects

Sustainable decisions must balance all of these factors

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Planning so far

• Initial investigations

• Pinch point areas highlighted

• Site visits and investigations

• Potential route options

• Desktop analysis

• Council meetings

• Refine to feasible route

options

12

Where we are at now

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Any questions?

• Questions?

• Comments?

• Feedback?

What to expect during construction

Project Manager

Mayur Kulkarni

15

Typical underground cable project - excavation

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Typical underground cable project – cable trench

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Modern typical cable installation – 33,000 Volt cables

backfill

backfill

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Conduit installation

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Semi-permanent restoration following conduit install

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Joint bay installation

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Conduits entering joint bay and communications pit

22

Cable pulling

23

Cable joining

24

Testing

25

Underground 33,000 volt cable installation

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Similar recent/current cable projects

• Surry Hills to Rose Bay cable project

• Engadine cable project

• Sydney Olympic Park cable project

• Beaconsfield to Kogarah cable project

• Homebush to Rozelle cable project

• North Shore cable upgrade project

• Carlingford cable project

• Pyrmont to Camperdown cable project

• Pymble to Lindfield project

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Summary

• Modern cable installation is less disruptive, but there are still

impacts we need to manage.

• Factors to consider when planning to install cables are many

and sometimes competing.

• Experience of previous projects informs planning.

• Local knowledge is a key part of the process.

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Any questions?

• Questions?

• Comments?

• Feedback?

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Next steps:

• How your feedback will be used in the project

planning process.

– Feedback forms

– Consolidation and

incorporation into plans

– Decision

– Environmental assessment

30

Key dates: