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PUBLIC WORKS PROJECTS <br /> <br />Department: Sanitary Sewer <br /> <br />Item: Re-Line Sanitary Sewer Lines <br /> <br />Year: 2025 - 2042 <br /> <br />Cost: $200,000 each year starting in 2025 <br /> <br /> <br />Description: This project is a proposed annual lining of certain problem sewers. <br />Problem sewer areas are areas that have roots in the line, sags, and offset joints. The <br />Public Works Department uses video cameras to look inside sewer lines for damaged <br />pipes that need replacing. Previously, the City had to excavate the damaged portion of the <br />sewer to make repairs. We can now contract for sewer lining repair process that is less <br />disruptive to traffic. <br />A heat-sensitive reconstruction tube is custom engineered and manufactured to fit the <br />damaged pipe. The flexible resin tube is lowered into a manhole and then filled with <br />water. The weight of the water pushes the tube into the damaged pipe, and the tube <br />becomes the new interior surface of the pipe. A boiling process causes the resin tube to <br />cure, making the pipe hard and structurally sound. The whole process normally requires <br />no digging or disruption, and this cost-effective process allows the City to repair more <br />sewer lines with less disruption than if using the excavation method. <br />Justification: This project is necessary in order to prevent sewer back-ups. When <br />viewing our annually televises sewer tapes, we find numerous offset joints, sags, roots in <br />the main and service wyes. Also, infiltration was evident in the main lines. <br /> <br /> <br /> <br /> <br /> <br /> <br />35