Hydro Tasmania engaged Hazell Bros to undertake the Lake King William Approach Channel, Intake and Downstream Excavation works at Tarraleah in central Tasmania.

Delivered in challenging environmental conditions under three separable portions, works began in late 2022 at Lake King William and were completed at the beginning of 2025.

Across the three separable portions of the project, approximately 330,000 m³ of rock and soil was excavated, 40 controlled blasts were carried out, over 4,200 rock bolts, approximately 3,200 m³ of shotcrete was applied and 2,200 m³ of plastic concrete was placed to form a low-permeability cut-off trench to control seepage and maintain structural integrity.

Hazell Bros received positive feedback from Hydro Tasmania’s representatives regarding the collaborative approach, responsiveness to emerging risks, and professional conduct throughout including successfully delivering the project without any EPA reportable environmental incidents or lost time injuries recorded.”