USIP Sewer Rehabilitation Project with HOBAS Pipes

A sewer that was reportedly built in 1896 has been serving the area. Planners decided that it needed permanent preservation to support future construction. They also decided that slipline rehabilitation was necessary to ensure the sewer would not interfere with the future USIP facility. HOBAS CC-GRP SewerLine® Systems was the only product that met all of the project requirements. The pipe to be installed had to be structurally sound, grouted in place and capable of handling the final loads. The existing brick sewer was sliplined with 110 m of 1750 diameter HOBAS CC-GRP Pipe. The actual inside diameter of the original brick sewer varied between 1850 and 1900 mm. The engineering firm of Metcalf &, Eddy thoroughly evaluated the host pipe conditions in order to maximize the diameter of the sliplining pipe. The radial clearance calculated between the HOBAS Pipe OD and the brick host pipe ID ranged between 6 and 32 mm.