Transmission lines & substationsJohn Holland

Transmission lines & substations

We have a strong track record in complex transmission line and network infrastructure projects, working across engineering, procurement and construction.

Examples include the Waddamanna – Lindisfarne Transmission Line works in Tasmania – which extends over 100 road crossings, eight major highways, four rail line crossings, and eight river crossings.   

We were the first contractor in Australia to replace Optical Ground Wire (OPGW) on high voltage transmission lines in a live line situation. We transferred the OPGW to the centre of the tower on the Palmerston to Georgetown Transmission Line, and this ground-breaking practice has since been adopted by major utilities in the industry.

We have also delivered and maintained other highly technical and complex projects within the power sector, such as the Columboola, Wandoan & Western Downs 275 kV Transmission Lines; the Nebo to Strathmore 275 kV Transmission Line; and the in-house design, drafting, testing and procurement of a suite of 500 kV Transmission Line towers in Queensland.

Complex projects that require expertise and experience – we’re up for the challenge.


Transmission lines & substations projects

A significant upgrade to NW Tasmania’s power grid.


John Holland pays respect to the Traditional Owners and Custodiams of the land on which we work and live, and their connections to land, sea and community. We pay our respect to their Elders past and present and extend that respect to all First Nations peoples today.