A SINKHOLE in Caversham caused by leaks from a drainage pipe has cost the City of Swan about $138,000 to have repaired.
City of Swan chief executive officer Mike Foley said the city first became aware of the sinkhole on February 20 and that repairs had been carried out by Interflow between March 8-16.
Interflow were engaged by the city to evaluate and repair the sinkhole after initial investigations showed a 900mm drainage pipe under Benara Rd – a creek crossing running almost at capacity with water and mud – had leaked at joint locations.
An Interflow spokeswoman said the resulting sinkhole, which was getting bigger was a danger to pedestrian and vehicular traffic so required immediate attention.
The company’s solution was to clean, reline and grout the pipe with a 23m rib loc expanda liner, which after grouting and sealing, has given the drain another 50 plus years of service.
Interflow’s WA operations manager Stephen Thomson said the company had worked with the city’s engineering team to find a solution.
“We work on the prevention side too,” he said.
“Interflow can check storm water culverts for potential problems and work towards asset management strategies to economically extend the life of underground assets.’’
By Anita McInnes