Six inoperable valves located on the City of Garden City’s 16-inch main transmission line had complicated water main repairs for several years. Without the ability to use the valves, breaks in the water system required shutting down water service to two or three blocks at a time for repair work. Concerns were growing that a break in the 16-inch transmission line would severely impact the supply of water from two meter pits that connect to the City of Detroit’s system. Line stop repair was used to expedite replacement of the six valves to restore the water system’s full operability.
This alternative approach enabled repair work to be performed over a six-week period without impacting the water system’s daily flow. Water service was maintained for residents and emergency needs. Temporary line stops were installed just upstream and downstream of each inoperable valve to isolate it for repair. The line stops were removed after repairs, restoring the water main’s original flow. Wade Trim assisted the City with prequalifying contractors, provided full construction administration services, and worked with the line stop manufacturer to prepare contract documents.
