Salt Lake City's Orange Street Sewer Line, now a half century old, was severely deteriorated with some parts already collapsed. Kiewit rehabilitated about three miles of the 48-in.-dia reinforced concrete pipe to eliminate infiltration, improve hydraulic flow and extend its service life.
Pipe rehabilitation involved both slip-lining with centrifugally cast, fiberglass-reinforced polymer mortar pipe and cured-in-place-pipe technologies.
The project also included rehabbing 45 existing manholes, installing nine new ones along with access structures and reinstating more than 120 service collectors and lateral connections. As a result, Kiewit and the Salt Lake City Dept. of Public Utilities have extended the life of the sewer line for another 50 years.
The project ran down the middle of a residential street, with multiple homes, two elementary schools and a golf course in the construction zone. Kiewit reconnected the lateral sewer lines of each home to the new sewer during the least disruptive times of day, and homeowners were notified so they could plan accordingly.
Kiewit completed the project with no sewer backups, no escalated residential complaints and received 100% of the project's public-information incentive, which was approved by residents.
Best Intermountain Water/Environment Project
Orange Street Sewer Trunk Line Rehabilitation
Salt Lake City
Owner Salt Lake City Dept. of Public Utilities, Salt Lake City
Engineer Black & Veatch, Overland Park, Kan.
General Contractor Kiewit Infrastructure West, American Fork, Utah