Central Highlands Water called for tenders for the Lake Wendouree Reuse Scheme in The Courier on Saturday.

The tender is for construction of the project's facilities, including storage and pumping facilities at Ballarat North Wastewater Treatment Plant in Gillies St. It includes construction of the pipeline between the pump station

and Paul's Wetland and other pits, minor structures and associated works.

The tender also includes an irrigation pump station and pipeline on Lake Wendouree's southern shore, to irrigate the City Oval.

The project is earmarked for completion in December, when it will start piping 600 megalitres of treated class A wastewater a year to the lake, via 3km of pipeline.

This equates to about 1.6 ML per day, adding to the 250ML of storm water being pumped to the lake annually from Paul's Wetland.

The cost of each megalitre to fill Lake Wendouree remains unknown, with CHW yesterday saying it was "commercial in confidence".

According to tender documents, the proposed pipeline will run north along Dowling St, from the corner of Dowling and Cambridge streets, continuing west into Giot Dve and passing under Gillies Rd into Pioneer Park.

The pipeline is part of the $7 million Lake Wendouree Water Supply Project, jointly funded by the State Government, CHW and the City of Ballarat.

The project caused controversy earlier this year, with confusion about its completion date. It was believed the project had been delayed from it's proposed completion date of August.

But the authority said works at the Ballarat North WWTP had not yet been approved, preventing it from releasing water into the lake.