Utility Awards Contract For Pipe Lining Project

Lametti & Sons, a licensee of Inliner Technologies, will renew 54,000 feet of wastewater pipe under an approximately $1.9 million contract from the City of St. Paul, MN, Department of Public Works.

The project involves installing Inliner's cured-in-place pipe (CIPP) technology to renew the 70-year-old vitrified clay pipe, which ranges from eight inches to 36 inches in diameter. The project will begin in late fall, and is expected to be completed in October 2003.

The project area includes a grid of sewer lines on the city's east side, with boundaries starting at the northwest corner of Maryland Avenue and Edgerton Street, running east to McKnight Road, then south to Carver Avenue. One of the lines will cross Interstate 94, requiring Lametti & Sons to create a bypass plan to minimize traffic disruption.

Cecily Schurhamer, engineering technician, is overseeing the project for the city. Dan Banken is project manager for Lametti & Sons.

Cured-in-place (CIPP) technology allows rehabilitation of damaged underground wastewater and storm sewer pipe without excavating. The process reduces noise, traffic disturbance, and road damage and can be done in a shorter time frame and for less cost than replacing existing lines. With Inliner's method, a felt sleeve-saturated with resin and coated with a waterproof layer-is inserted into the pipe. Hot water is circulated through the sleeve, which hardens the resin. This material serves as a barrier between the damaged pipe and the wastewater that flows through it; or as a new stand-alone pipe.