Record Sliplining Pipeline in Illinois, US
One of the most recent projects was Lake Street sewer rehab, including 2,100 m of DN 3000 semi-elliptic cast-in-place concrete sewer. The concrete sewer pipe had cracked at a number of places and had lime deposits at cracks and ‘cold’ joints, and the concrete had corroded due to the action of hydrogen sulfide and flowing water. In order to restore hydraulic and structural integrity the sewer needed to be rehabilitated. Bid documents for the project included various options: segmental sliplining, cured in place (CIPP) lining and insertion of panels. Kenny Construction of Northbrook, Illinois, submitted the bid with the intent to slipline the sewer. The job was awarded to them based on rehabilitation by sliplining with HOBAS CC-GRP Pipe Systems. Jack Callahan, vice president of the underground group with Kenny, said, “We thought it would be the most economical option due to timing and the size. We do a lot of CIPP, but this was a little too large for that method, considering the water situation, the bypass pumping that would have been required and everything else. It would have been more difficult and expensive.”