Tonsley East Substation Takes Shape to Power Upcoming Tunnel Project
The construction of the Tonsley East Substation, a critical component of the transformative T2D Project, is in full swing. SA Power Networks, in conjunction with its subsidiary Enerven, is spearheading this endeavor to ensure a seamless power supply to the upcoming Southern Tunnels. Situated on the site of a former Mitsubishi building fronting South Road, the substation's strategic placement is set to play a pivotal role in the project's Southern Laydown Area.
The Tonsley East Substation, designed to power the tunnel-boring machines (TBMs) and subsequently the two parallel 4km Southern Tunnels upon their completion in 2030, marks the first construction directly linked to the T2D Project. The commencement of construction this year follows meticulous site clearance, comprehensive ground investigations, and detailed substation design. The construction timeline is estimated at approximately one year.
In an impressive feat of engineering, two 66,000-volt transformers, each weighing 38 tonnes, have been installed at the Tonsley East Substation in early August. These transformers, sourced from the renowned Wilson Transformer Company in Victoria, are an essential element in ensuring a dedicated and robust power source for the TBM operations.
Anticipating the commencement of TBM works on the Southern Tunnels in 2026, the Tonsley East Substation is on track to be operational well in advance. A parallel substation is also in the works for the Richmond area, intended to power the TBMs that will construct the 2km Northern Tunnels between 2029 and 2031.
The T2D Project, spanning 10.5km, promises to revolutionize travel by offering a swift nine-minute journey from West Hindmarsh to Darlington. Furthermore, it will complete the North-South Corridor's 78km non-stop motorway stretch, seamlessly connecting Gawler and Old Noarlunga.
Source: South Australia