Trigg Underground Power Project

This page contains information about the Trigg Underground Power Project including frequently asked questions and consultation information. 

On February 2017 the City received notification from the Minister of Energy that Trigg was one of two Round 6 locations given the approval by the SUPP Steering Committee and work was scheduled to start in February 2020 with a practical completion date of February 2021.

As part of the process the State Government department responsible for overseeing the SUPP program (currently Energy Policy WA) issued a Survey Letter package in August 2016 requesting Property Owners indicate their support for such a program in their location. The letter gave an estimated contribution value - this was estimated to be $10,100 per typical single residential property.

The survey was completed by the Property Owners and these were then collated by an independent survey company. The survey results were provided to the State Government department (Energy Policy WA) where the results were inputted into a model that takes into account a number of factors including the risk of the current infrastructure failing. The City in Round 6 was given the opportunity to increase the community contribution percentage to gain extra points for the weighting  of the results with a minimum of 50% required, the City selected 60% based on the expected community support and as approved by Council.

The City was then formally advised which limited projects were selected by the Steering Committee and proceeded to work on the required actions as per the Round Guidelines.


The dollar value in the survey letter is different to what is on my Underground Power Rates Notice?

The survey letter supplied an estimated average figure of $10,100 for a typical residential property. However, the exact figure will be provided as soon as the funding arrangements are finalised and approved by Council.

What is the timetable for the Project and how is the work implemented?

The project was set to commence in January/February 2020 and is on schedule for completion in February 2021.

Western Power, via its tendered contractor, will be installing the new underground cabling progressively through the street verges using below ground boring methods. Once the new system is connected and energised, Western Power will change each property over from the overhead to the new underground system. The old overhead infrastructure is then removed as soon as possible.

Would all the old overhead lines and poles be removed?

All the distribution lines in the project area will be removed but this would not occur in some areas until late in the project. Some parts of the overhead system cannot be turned off until all properties have been changed to the new underground system.

Why has it taken so long for the project to start?

The project was part of a larger bundle of areas that were to be completed in this round of SUPP. It was determined by the program that Menora would be done before Trigg. It is not recommended to run such projects side by side so Trigg was the next on the list after Menora.