Wastewater Projects

Agua Hedionda Sewer Lift Station and Vista/Carlsbad Interceptor Sewer Replacement

Vista and Carlsbad, California
$64.2 million
City of Vista

Butier Engineering, Inc. is performing as the Owner’s Representative for the construction of the sewer lift station and interceptor sewer reaches. This is a joint sewer project with the City of Vista and the City of Carlsbad to replace existing facilities, increase sewer capacity and improve reliability within the lower portion of the sewer system. The project beings at the north shore of the Agua Hedionda Lagoon in Carlsbad and extends a distance of 2.3 miles to the Encina Water Pollution Control Facility. Major project components include the following:

  • Removal and replacement of the existing wood trestle sewer support bridge across the lagoon with a new steel support bridge. Each steel truss is 144 feet long weighing more than 22 tons. The new bridge will provide vehicle access to sewer facilities. The existing 42-inch diameter sewer pipe along the bridge will be replaced with a new 54-inch pipe.
  • Removal and replacement of the existing Agua Hedionda lift station. The new structure will house replacement motors and pumps, as well as new system enhancements including an emergency generator and bypass motors and pumps, an electrical control building, and odor control facilities.
  • Construction of a new 30-inch diameter force main and a new 54-inch diameter gravity sewer line to increase system capacity and reliability. The force main will provide 4,000 linear feet of high density polyethylene pipe parallel to an existing line and will connect into 7,000 linear feet of new 54-inch diameter gravity sewer to be constructed in Avenida Encinas from Cannon Road to the Encina Water Pollution Control Facility.