Salinity Management Pipeline, Phase 1E (48")

• Owner: Calleguas Municipal Water District
• Cost: $23,000,000

In efforts to develop new local water resources by removing high salinity from groundwater within Calleguas Creek Watershed in the County of Ventura, Calleguas Municipal Water District has taken a lead role to construct a pipeline to discharge saline water and effluent from numerous wastewater treatment plants. The proposed pipeline, when completed, will be approximately 35 miles long traversing from west Simi Valley to the Pacific Ocean in the City of Port Hueneme. The pipeline is planned to discharge into the Pacific Ocean through an outfall structure.

Perliter & Ingalsbe provided engineering services including planning, design, and construction support services for Phase 1E pipeline. The pipeline is located in unincorporated areas of the Ventura County and City of Port Hueneme, California. On east side, it begins near intersection of Edison Drive and Hueneme Road and ends near intersection of Ventura Road and Surfside Drive on west side in the City of Port Hueneme.

The project included a wide variety of components, complex design tasks, difficult and time consuming permitting process, extensive coordination efforts and preparation of many drawings and detailed specifications involving civil, mechanical, structural, traffic control, electrical, and instrumentation engineering disciplines.

Major Components and Special Features:

• Approximately 10,000 feet (1.9 miles) of 48" welded steel pressurized pipeline in public and private right-of-way
• SMP control station involving control valves, instrumentation, electrical work, and communication system
• One microtunneling under a large drain channel
• Three auger boring and jacking operations to install casings under railroad, major road intersections, and drains
• Special blow-offs
• Air vacuum and air release valve assemblies and manholes
• Extensive excavation, trench shoring, and special fill and backfill

• High groundwater and dewatering
• Excavation through hazardous material, concrete blocks, large boulders, and archeologically sensitive areas
• Permitting from numerous agencies including Caltrans, Department of Industrial Relations Mining and Tunneling, County of Ventura, Department of Fish and Game, and City of Port Hueneme
• Narrow and busy roads with existing utilities
• Limited staging and storage areas
• Complex traffic controls