DATE: May 3, 2016
TO: Mayor and City Council
FROM: Director of Utilities & Environmental Services
SUBJECT
Title
Water Main Replacement at Mission Boulevard, Fairway Street to Lexington Avenue: Approval of Plans and Specifications, and Call for Bids
End
RECOMMENDATION
Recommendation
That Council adopts the attached resolution approving the plans and specifications for the Water Main Replacement at Mission Boulevard, Fairway Street to Lexington Avenue Project and calling for bids to be received on June 7, 2016.
Body
SUMMARY
This project will replace and upgrade approximately 6,300 feet of cast iron (CI) water mains that were installed sixty-two years ago with new ductile iron (DI) water mains in Mission Boulevard from Fairway Street to Lexington Avenue.
BACKGROUND AND DISCUSSION
This project is part of a continuing program to maintain and upgrade the City's water distribution system. The City has approximately 340 miles of water distribution pipeline, of which approximately twenty miles (6%) is CI pipe that was installed between 1926 and 1992. CI pipe has a design life of roughly fifty years, depending upon when it was manufactured and the soil conditions where it is installed. In addition, the joints of old CI pipes can fail due to displacement caused by seismic movement, the forces of water flowing in the pipe, and seasonal changes in the surrounding soil.
Staff has prioritized water mains for replacement throughout the City by rating pipe segments based on age, adequacy of size and flow, the number of leaks or failures that have occurred, and the difficulty to repair the pipe if it failed considering location and traffic conditions. The CI pipes to be replaced as part of this project were also selected for expedited replacement so that the needed water main replacements are completed prior to the construction of the Mission Boulevard Corridor Improvement Project anticipated to start...
Click here for full text