A major upgrade of Colac's major water supply pipeline is at the halfway mark.
About 3 kilometres of pipe have been replaced, with a further 3.2 kilometres remaining.
The $14.7 million project, part of a staged replacement program, will increase capacity and ensure future water security for Colac.
Crews have battled challenging terrain and steep inclines laying the new pipe, while respecting environmentally sensitive areas.
Smart construction techniques, such as underground boring, have meant minimal disturbance to local flora and fauna.
The majority of the pipeworks are expected to be completed in August, with minor works to be undertaken during the drier summer months.
This project is being delivered by the Barwon Water Alliance.