Salinity Management Pipelines, Phases 2A through 2C (30")

• Type of Project: Pipeline
• Owner: Calleguas Municipal Water District
• Cost: $18,730,000 (total for three phases)

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 was brought on board to provide engineering services for all of the phases, 2A through 2C. The pipelines are located in unincorporated areas of the Ventura County and City of Camarillo, California. On south side, it begins near intersection of Portrero Road and South Lewis Road and ends near intersection of Upland Road and Las Posas Road on north side in the City of Camarillo.

These projects 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, and traffic control engineering disciplines.

Major Components and Special Features:

• Approximately 23,200 feet (4.4 miles) of 30" welded steel, PVC, and HDPE pipelines in public and private right-of-way
• Southern part of the 13,000 feet of pipeline is pressurized and the remaining northern part of the pipeline is under gravity flow. Northern and southern pipeline reaches are connected through an in-line control tank (o.45MG).
• Construction across California Highway 101
• Numerous microtunneling and jacking operations to install casings under creek, major road intersections, rail tracks, and highway 101
• Special blow-offs
• Air vacuum and air release valve assemblies and manholes
• Special air vents for gravity pipeline reaches

• Extensive excavation, trench shoring, and special fill and backfill
• Permitting from numerous agencies including Caltrans, Department of Industrial Relations Mining and Tunneling, Ventura County Watershed Protection District, County of Ventura, Department of Fish and Game, and City of Camarillo
• Large drop manholes
• Narrow and busy roads with existing utilities
• Limited staging and storage areas
• Complex traffic controls