Vital siphon works on Waranga Western Channel are under way to ensure ongoing water supply for Rochester and the Loddon Valley, with Goulburn-Murray Water upgrading two key siphons in the Campaspe region.
The project will see important improvements made to the Campaspe River Siphon and Bulls Siphon until August 6 as part of G-MW’s winter works program.
The work sites are along one of G-MW’s main carrier channels, the Waranga Western Channel, and are about 5km apart.
Project manager Jarrod O’Brien said work on the Campaspe River Siphon would see the existing siphon relined with fibre-reinforced concrete to ensure the historic asset continued to operate and provide service to both Rochester and Loddon Valley irrigation districts.
‘‘The siphon was built in the early 1900s and is nearing the end of its serviceable life, which is why it’s important these works take place. It features three barrels which allow water from the Waranga Western Channel to pass under the Campaspe River without interference,’’ he said.
‘‘Ongoing patch works have taken place in previous years but this will be the first time since construction that significant upgrade works have taken place.’’
The relining work will be carried out by contractor Downer Pipetech. It will cost about $3.7million and provide a similar lifespan to a full replacement.
‘‘Work on nearby Bulls Siphon will involve removing the old structure and replacing with a new four-barrel, three-metre diameter reinforced concrete structure. This siphon has reached the end of its serviceable life,’’ Mr O’Brien said.
‘‘Bulls Siphon has experienced significant deterioration and has experienced considerably more failures compared to Campaspe. The residual strength in the original structure is much less, which is why we adopted the replacement option.’’
G-MW will carry out the design and construction work on Bulls Siphon, which is estimated to cost $2.7million.
Zegelin Rd will be closed between Murdoch and Tasker roads for the duration of the works at Bulls Siphon and drivers are asked to take care on local roads as there will be trucks and heavy machinery moving through the area.