Campaspe siphons get overdue upgrade
GOULBURN-MURRAY Water have begun upgrading two key siphons in the Campaspe region this winter.
The project will see important improvements made to the Campaspe River Siphon and Bulls Siphon until August 6.
The work sites are located along one of GMW’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 will see the existing siphon relined with fibre-reinforced concrete to ensure the historic asset continues 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,” he said. “It features three barrels which allow water from the Waranga Western Channel to pass under the Campaspe River without interference.
“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 re-lining work will be carried out by contractor Downer Pipetech and will cost about $3.7 million — significantly less than if the whole structure were replaced, which would be in the vicinity of $12 million.
The newly lined siphon will provide a similar lifespan to a full replacement option.
Work on nearby Bulls Siphon will involve removing the old structure and replacing with a new four barrel three- metre diameter reinforced concrete structure.
“Bulls Siphon has experienced significant deterioration and has experienced considerably more failures compared to Campaspe,” Mr O’Brien said.
“The residual strength in the original structure is much less which is why we adopted the replacement option.
“GMW will carry out the design and construction work on Bulls Siphon, which is estimated to cost $2.7 million.
“By carrying out these works it will remove the risk of failure and ensure we can continue to provide a reliable service to our customers.
“Zegelin Road between Murdoch and Tasker roads will be closed for the duration of the works at Bulls Siphon.
“Drivers are asked to take care on local roads as there will be trucks and heavy machinery moving through the area.”
VINTAGE UPDATE — GMW managing director Pat Lennon, left, with project manager Jarrod O’Brien checking the Campaspe and Bulls Siphon projects.