Over the next several weeks City Utilities will be working to extend the life of downtown sewers using a process called "cured in place pipe" (CIPP), which is less costly than pipe replacement and will extend the life of the pipe more than 50 years.
A plastic liner is inverted into the pipe through a manhole. Once sections of the pipe are lined, hot water will be pumped through the lining to harden it. The linings will be inserted into brick sewers built in the 1860s on Clinton and Calhoun streets. Over the next two weeks, work on Clinton will cause lane restrictions between Freimann Square and Jefferson Boulevard. Next month the process will be performed on a brick sewers on Calhoun Street.
During the process residents may notice a plastic-type odor that is non-carcinogenic.
Since 1998, City Utilities has lined 134 miles of combined or sanitary sewers using this process.