Mission Trails Flow Regulatory Structure II and Flow Control Facility

Owner:
San Diego County Water Authority
Value:
$28.8 million
Completion:
2022
Location:
San Diego, CA

The San Diego County Water Authority selected Butier Engineering, Inc. to provide construction management services for the Mission Trails Flow Regulatory Structure II and Flow Control Facility Project. Ninyo & Moore is providing materials testing, soils testing, and geotechnical services as a sub-consultant to Butier. The project, which is located in the northwest area of Mission Trails Regional Park, will upgrade the untreated water system that delivers water to treatment plants serving central and southern San Diego County. When completed, the 5-million-gallon concrete reservoir will hold enough water to fill seven Olympic-sized swimming pools. Visitors to this area of the park will be unaware that the giant tank is there since it will be buried and covered with soil and vegetation that matches the surrounding landscape.

Construction of the new flow regulatory structure and flow control facility includes appurtenances, piping, fittings, drainage facilities, specialties, structures, and ancillary components. The flow control facility will be downstream of the flow regulatory structure located on Pipeline 3 downstream of the existing flow balancing structure. Additional scope of work items include the following:

  • 115 linear feet of 94-inch welded steel pipe, 55 linear feet of 74.5-inch welded steel pipe, 55 linear feet of 71-inch welded steel pipe for the north connection between the existing Mission Trails Pipeline Tunnel and Pipelines 3 and 4
  • 400 linear feet of 94-inch welded steel pipe for the outlet pipe connection between the Mission Trails Flow Regulatory Structure II and the existing south tunnel shaft
  • 65 linear feet of 92-inch welded steel pipe for the south connection between the existing Mission Trails Pipeline Tunnel and Pipeline 3
  • Demolition of eight (8) existing Elliot vents and seven (7) existing blow offs
  • Abandonment of portions of existing Pipelines 3 and 4

Videos/News Articles:

NBC San Diego Feature Story