Where is Twin Oaks Valley Water Treatment Plant located?
The 34.7-acre site for the proposed Twin Oaks Valley Water Treatment Plant is owned by the Water Authority and is located in an unincorporated portion of northern San Diego County, approximately 1.5 miles north of the City of San Marcos, 1.5 miles east of the City of Vista, and 2.5 miles northwest of the City of Escondido. The project site is also west of Interstate 15 (I-15), north of State Route (SR) 78, and south of SR 76. More specifically, the project site is approximately 2 miles northwest of the community of Twin Oaks and is approximately 1,200 feet to the west of Twin Oaks Valley Road. The existing Twin Oaks Flow Regulatory Structure (FRS) and associated facilities are located on the project site and the existing Water Authority Pipelines 3, 4 and 5 are located adjacent to the site on the east. The proposed project would utilize both of the access road alignments previously identified in the Draft EIR (Volume II of the Final EIR). The 1,200-foot long Northern Access Road (formerly Alternative 1 Access Road in the Draft EIR) would partially incorporate an existing Vallecitos Water District (VWD) road, and would serve as the primary access to the project site. The 2,000-foot long Southern Access Road (formerly Alternative 2 Access Road in the Draft EIR) would improve the existing access road to the FRS, and would provide secondary emergency/construction access to the project site. The access road alignments combined with the 34.7-acre project site form the 40.7-acre project study area.
Where is the Olivenhain water plant?
The Olivenhain Water Treatment Plant Expansion Alternative would expand the existing 34-mgd Olivenhain Plant near Lake Hodges by constructing a second treatment facility at this site with a 50-mgd capacity. Under this alternative, a new 48-inch-diameter pipeline approximately 2.5 miles long would be installed between the Olivenhain Plant and the Second Aqueduct to deliver the treated water from the Olivenhain Plant. The Water Authority would have to modify Pipeline 3 to pump this water to the north for distribution throughout San Diego County. In addition, a new reservoir, flow control facilities, and an additional pump station would be installed on top of San Marcos Hill approximately 4 miles to the northwest to regulate flows and deliver the water farther north.
Does the proposed development area include prime farmland?
The proposed development area (including the project site and two access road corridors) does not include any Prime Farmland and therefore would not result in conversion of this designation to non-agricultural use.
