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certified engineering geologist. The applicant shall obtain written approval of <br /> proposed setbacks from the Department of Public Works prior to excavation. <br /> 4. To minimize potential loss of soil productivity, surface soils shall be separated <br /> from subsoils and stockpiled separately. Resoiling shall be conducted to restore <br /> original soil stratigraphy. A soil segregation and resoiling plan shall be submitted <br /> to and approved by the County, the U.S. Soil Conservation Service, and the <br /> California Division of Mines and Geology. <br /> 3.2 Hvdroloev and Water Quality <br /> 3.2.1 Setting <br /> Regional <br /> Surface Hvdroloe.v <br /> The proposed project site is located within the Mokelumne River's 627-square- <br /> mile drainage area. The Mokelumne River originates at an elevation above 8,000 feet at <br /> the crest of the Sierra Nevada Mountains (Alpine County). From its point of origin, the <br /> river flows 130 miles in a southwesterly direction across California's Central Valley, and <br /> joins the Sacramento River in the San Francisco Bay Delta. <br /> Upstream of the proposed project site, the Mokelumne River flows are regulated <br /> by two reservoirs operated by the East Bay Municipal Utility District (EBMUD); the <br /> Pardee and Camanche reservoirs. Pardee Reservoir, created in 1929, is used for power <br /> generation, irrigation, and domestic and municipal water supply for the eastern San <br /> Francisco Bay Area. Releases from Pardee Reservoir to the Mokelumne River flow into <br /> Camanche Reservoir. Camanche Reservoir was created in 1963 with 431,500 acre-feet <br /> of storage capacity. The reservoir supplies water to the North San Joaquin Irrigation <br /> District and is operated to provide flood control. Releases from Camanche Reservoir <br /> into the Mokelumne River, approximately 4.4 miles upstream of the proposed project <br /> site, are used for irrigation, domestic water supply, fish hatchery operations, and <br /> recreation. <br /> The Mokelumne River Fish Hatchery, operated by the California Department of <br /> Fish and Game (CDFG), is located between the proposed project site and Camanche <br /> Reservoir. Chinook salmon and Steelhead are raised at the hatchery and released to the <br /> 26 <br />