Laserfiche WebLink
PUBLIC WORKS PROJECTS <br /> Department: Sanitary Sewer <br /> Item: Re-Line Sanitary Sewer Lines <br /> Year: 2022 - 2041 <br /> Cost: S200,000 each year <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 /> 114 <br /> Al r <br /> 28 <br />