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a 4 E#cE' S%.a C ,,§ Fs Po-R* OJ.g>3 EC3 CDOO ,� II A'�. r_•��'"'' � ��w'csa - '" �?c..�'�1. sP d"�'�, °t,. > � -% "f,� � �<`<r,�x'¢a a[��.,,,....Er{ `a :(�;�= �,<�.. � c � '�� #- t c � �°t � Q .i 3.1 PROJECT SUMMARY ' p I The proposed project is a Quarry Excavation application (No. QX-96-1) for the extraction I of sand and gravel on a 142-acre site consisting of three parcels (APN 265-090-04, 05, 06) in San Joaquin County. The project proponent, DSS Engineering Contractors, is proposing i; �.- to excavate 29,750,000 tons of material over a 56-year period. The entire 142-acre site is proposed for excavation to a depth of approximately 125 feet. A proposed processing j facility would occupy 11 acres of the project site. The proponent is proposing to complete ' ' excavation in four mining 'I phases, with an average of 400,000 tons per year being excavated in each of the first seven years, and 550,000 tons per year duringeach of the remaining 49 years. One large pit is proposed to be excavated to a depth of 125 feet below grade and 4 reclaimed to a depth of 120 feet below grade. Approximately 42 acres would be composed of pit walls, with 88 acres remaining in the pit bottom and proposed to be reclaimed to row crops. The proponent is proposing working slopes of 3/ 1 and final slopes of 1Y2:1, with . . 20-foot benches every 20 feet on the pit slopes. A detailed description of the proposed project is provided in Section 3.4. A I 3.2 SETTING Project Location The project site is located in the southwest portion of San Joaquin County, south of the " # City of Tracy and northeast of the intersection of Interstates 5 and 580 (Figure 3-1). The San Joaquin County Assessor's Parcel Numbers for the project site are 265-090-04, 05, �! and 06. The project site is bounded by Koster Road on the east and is approximately one- ' half mile south of the Blewett and Koster Road intersection (T4S, R6E, Sec. 5). The Delta i Mendota Canal runs along the eastern side of the project site, and the California Aqueduct is contiguous with the southwest corner of the project site (Figure 3-2). The project site !' Y can be found on the U.S.G.S. Solyo 15 Minute Topographic quadrangle map. 1 The project site is within an area containing significant nificant a ' ggrega#e deposits and several other existing and/or permitted (but not yet operational) quarry excavations. The site has historically been used as an apricot orchard, although approximately half of the trees were Ij recently removed. Surrounding land uses include orchards, row crops, and other quarry I Draft Environmental Impact 3-1 . �j t RER-96-3 !!