Insituform Technologies has been awarded a $US9.1 million contract by the City and County of Honolulu, Hawaii to reline sewer pipe using cured-in-place-pipe (CIPP).
Upon completion of the project, nearly 8,000 feet of 8-inch to 30-inch deteriorating sewer pipe, the majority of which is located under Kalanianaole Highway, will be cleaned, inspected and rehabilitated with Insituform® CIPP. Insituform has completed over $US30 million in pipeline rehabilitation for Honolulu since 2005.
For the past three years, the City and County of Honolulu has been implementing a 10 year capital improvement plan. The City and County expects to spend approximately $US30 million annually on the rehabilitation and replacement of its water, sewer and stormwater pipelines.
“The City and County of Honolulu recognises the need for pipeline rehabilitation and the benefits of Trenchless Technology to this project,” said General Manager for Insituform’s West Region Joe Lane. “Compared to traditional dig and replace methods CIPP allows the City and County to upgrade their system at a lower cost and with less disruption to citizens and businesses.”
Work on this latest project is expected to begin in September 2009 and be completed in the first quarter of 2011. The project also includes the inspection and cleaning of an additional 6,000 feet of sewer pipelines, the rehabilitation of manholes and the rehabilitation of three inverted siphons located beneath a water inlet.
Insituform® CIPP essentially provides a new pipe within the existing pipe. Because Insituform® CIPP is installed using existing manholes, the project can be completed without digging. Air inversion steam cure (AISC), which can reduce the amount of water used during installation by nearly 95 percent, will be used to install most of the CIPP. The Insituform® CIPP process is an affordable solution to rehabilitate sanitary sewers, storm sewers and force mains and can reduce infiltration, restore structural integrity and increase flow capacity.
