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Coastal Distribution System Project Planning
Need for Distribution System
A pipeline distribution system is needed to deliver all replacement water supplies to the areas most impacted by seawater intrusion and to reduce pumping near the coast. This pipeline system is called the Coastal Distribution System (CDS) and it is being constructed in phases.
Phase I
The first phases of the CDS have been constructed over the last five years on the Santa Cruz County side of the Pajaro River. These pipelines supply water to about 2,000 acres in the areas most impacted by seawater intrusion and where it could be easily connected to the Harkins Slough Project and supplemental wells. The existing CDS pipelines are shown in blue on the map below.
Phase II: CDS 2006-07 Construction Project
The next portions of the pipeline to be constructed will serve lands in Monterey County south of the Pajaro River.
In January and February of 2006, a survey was sent to the land owners in the area to confirm whether they would accept blended, tertiary-treated water from the Recycling Project. With over a 95% response rate, the results showed that 100% of respondents would accept project water. The results of the survey are shown on the map below.
The next phase of the Coastal Distribution System has been fully designed and the Agency will receive construction bids in the summer of 2006. To follow the progress of the CDS 2006-07 Construction Project click here.
In order to get the pipeline to the Monterey County side of the Pajaro River, Horizontal Directional Drilling will be used to bore a curved, 1,500-foot long bore-hole up to 50 feet below the river bottom. The 36-inch diameter steel pipeline will be welded in sections at the surface and pushed into the bore-hole as it is drilled. There will be no disturbance to the river bottom.
Construction is expected to start late 2006 and be finished by late 2007. The pipelines to be built during this 2006-07 construction phase are shown in purple below.
Phase III
Because of funding limitations on and the limited amount of water available from the first phase of the Recycling Project, only a certain amount of pipeline can be constructed during Phase II. Once additional water supplies are secured and the working Phase II projects are evaluated, the Agency will review options for finishing the remaining portions of pipeline (shown in white on the map above).