Overview

We're proposing to upgrade 2.7 km of overhead conductors in 2 sections between the Nepean Transmission Substation and the Smeaton Grange Switching Station. This would involve replacement of:

• three 13.2m timber H poles with taller 14.7m timber H poles
• a 16.15m timber three-pole structure with a taller 16.4m high steel three-pole structure, and replacement of three stays that support it
• approximately 2.7km of overhead “Lime” conductors in two sections with High Tension Low Sag “Brussels” conductors.

The need

There is insufficient capacity on the Nepean Transmission Network to supply forecast growth in demand to Denham Court, Smeaton Grange, and South Leppington. Load in the area is expected to increase from 50MVA to over 200MVA in the next ten years. This proposal is part of works required to increase capacity in the Nepean Transmission area and provide a stable and reliable source of electricity to the community as demand grows. The proposed conductor replacement and changes in pole height will sufficiently increase capacity of the electricity distribution system to service future load demand in the area.

The location

Section 1

The first section of the proposal is not on lands reserved under the National Parks and Wildlife Act. The line upgrade would run from Smeaton Grange Switching Station on Bulette Drive to Main Street to Mt Annan via an existing easement. The easement runs parallel to the back end of Downes Crescent, Waterworth Drive, crossing Narellan Road, continuing parallel to Main Street and finally crossing Main Street (please refer to Figure 1).

Section 2

The second section of the proposed line upgrade is on land reserved under the National Parks and Wildlife Act. It would run from the northernmost point of William Howe Regional Park, behind 20 Edward Howe Place, Narellan Vale. It travels in a straight line through William Howe Regional Park, finishing adjacent to Liz Kernohan Drive (behind Cassidy Street in Spring Farm. Please refer to Figure 2).

Further details of the location are provided in the draft Review of Environmental Factors (REF) linked below.

Map

Figure 1. Approximate location of section 1 of the proposal

Figure 2. Approximate location of section 2 of the proposal

Review of Environmental Factors

As the Authorised Network Operator and proponent for this proposal, Endeavour Energy will undertake an assessment of the project in consideration of all environmental, technical, financial and community impacts. Under the NSW Environmental Planning and Assessment Act 1979 (EP&A Act), Endeavor Energy is the determining authority of the proposal.

In accordance with Part 5 of the EP&A Act, Endeavour Energy has prepared a draft Review of Environmental Factors (REF) which outlines:

• the proposal description and justification (including benefits and objectives)
• an overview of the relevant legislative framework
• consultation completed during the assessment phase
• consideration of alternatives
• the environmental impact assessment and mitigation measures to be applied during construction and operation of the proposal.

Please see the draft REF for the proposal here.

Community correspondence

Stakeholder input and feedback is an important part of the environmental impact assessment process. Stakeholders and landowners located nearby to the proposal will be notified of construction works. Any planned electricity outages will be notified to impacted customers and kept to a minimum and be as short as possible to safely facilitate the development.

We welcome your feedback on our plans by 22 August 2024.

Project contact details

For further information or to make a submission please contact Endeavour Energy

Contact email: environment@endeavourenergy.com.au

Contact number: 133 718

We request any enquiries provide the REF name in the subject line: Feeder 9L5 Augmentation Stage 1