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1 KLE/NFELDER <br /> engmv<ovi<.nyrv<sowu«.. <br /> • 2.4 GENERAL GEOLOGIC AND HYDROLOGIC SETTING <br /> 2.4.1 Topography <br /> The attached Plate 1 was derived from the U.S. Geological Survey topographic map <br /> (Linden, California, 7.5-Minute, 1968) and shows that the elevation of Norman's <br /> Nursery is approximately 125 feet above mean sea level (msl). The property could be <br /> considered to be in a floodplain for the Duck River, Calaveras River, and Potter Creek. <br /> The Sierra foothills lie to the south of the nursery. Numerous drainages and intermittent <br /> streams are shown on the map to be flowing out of the hills towards the property. One <br /> stream exits the hills to the southeast of Norman's Nursery flowing northwest. Where <br /> the stream encounters the north-south centerline of Section 8, it bends towards the <br /> north where it later flows into Potter Creek. Based on the shape of the primary <br /> topographic contour line near the word "Escalon" in Escalon Bellota Road, it appears <br /> that a portion of the stream may also split into a drainage that flows across the <br /> Norman's Nursery property offsite to the northwest. The nursery site has a moderate <br /> topographic relief, sloping to the north and west. <br /> • Plate 2 is the base map for Norman's Nursery. The property was surveyed in February <br /> 1998 by Thompson-Hysell Engineers of Modesto, California. <br /> 2.4.2 Regional Geology <br /> The site lies within the eastern edge of the Great Valley Geomorphic Province of <br /> California. The valley is approximately 400 miles long and averages about 50 miles <br /> wide, and comprises about 20,000 square miles. The valley has been filled with a thick <br /> sequence of marine and non-marine sediments from the late Jurassic to Holocene. <br /> The uppermost strata of the Great Valley represent, for the most part, the alluvial, flood, <br /> and delta plains of two major rivers (Sacramento and San Joaquin Rivers) and their <br /> tributaries. <br /> The valley deposits are derived from the Coast Ranges to the west and the Sierra <br /> Nevada to the east. Granitic and metamorphic rocks outcrop along the eastern and <br /> southeastern flanks of the valley. Marine sedimentary rocks outcrop along most of the <br /> western, southwestern, southern, and southeastern flanks; and volcanic rocks and <br /> • deposits outcrop along the northeastern flanks of the valley. The valley geomorphology <br /> 117226.E02IST012R0696 Page 4 of 43 September 14, 2012 <br /> Copyright 2012 Kleinfelder <br />