San Diego CA Final Mile Delivery

The San Diego Project consists of the First and Second San Diego Aqueducts. These two aqueducts, with two branch lines, make up the backbone of the San Diego County Water Authority system. The First Aqueduct consists of Pipelines 1 and 2, which extend from the Metropolitan Water District's Colorado River Aqueduct near San Jacinto, California, to the city of San Diego's San Vicente Reservoir, approximately 15 miles northeast of the city.  Pipeline 1, designed by the Bureau of Reclamation, was constructed by the Navy Department to relieve the water supply emergency in San Diego County. Pipeline 2, roughly paralleling the first, was designed and constructed by the Bureau of Reclamation. The two pipelines share common tunnels and inverted siphons. They are operated as single units.
The Second Aqueduct consists of Pipelines 3 and 4. Although these pipelines are in common right-of-way for most of their length, they do not share any facilities south of Skinner Lake and are operated separately. Pipeline 3 extends from the Metropolitan Water District's Colorado River Aqueduct near Hemet, in Riverside County, to San Diego's Lower Otay Reservoir. Pipeline 4 terminates at San Diego's Alvarado Treatment Plant near Lake Murray. The Metropolitan Water District (MWD), of which the San Diego County Water Authority (Authority) is a constituent member, constructed the northern 35 miles of the Second Aqueduct to a major delivery point of the Authority, located about 6 miles south of the Riverside-San Diego County line. The MWD owns and operates this section of the aqueduct. The Authority constructed the remaining 59 miles of the aqueduct, and owns and operates it.
In June 1966, the Authority contracted with MWD to provide engineering services on the Parris-to- Costa Loma Aqueduct and Pipeline 4 of the Second Aqueduct. At the end of the year, the first reach of MWD's section of the pipeline was under construction, and the Authority was making preliminary investigations of its section of Pipeline 4. In May 1968, the Authority commenced the final designs of its portion of Pipeline 4.

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