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1 Mule Creek Gravel Pit )~onmental Assessment • Page 26 <br />' The soils in the azea of the proposed project site and surrounding aeeas are described as <br /> Catamount-lvywild-Legault-Rock Outcrop (iJSDA, Soil Survey, 1992): rock outcrop and <br /> shallow and moderately deep, somewhat excessively drained and excessively drained <br />' soils that formed in material weathered from granite. This general soil classification is <br /> used to describe areas with similar natural landscape. <br />' According to the detailed soil classification, which describes individual soil types, the <br /> azea occupied by the proposed project on Forest land, consists of Herbman very gravelly <br />' sandy loam and Legault very gravelly coarse sandy loam on the hillsides, and Agolls in <br /> the valley bottom. <br /> Herbman soils are associated with mountainsides'and upland ridges (15-40% slopes). <br /> They are well drained, shallow soils formed from Pikes Peak granite, and they have <br /> moderately rapid permeability, very low available water capacity, rapid runoff, and <br />' moderate hazard of water erosion. - <br /> Legault soils aze associated with mountainsides (5 - 40% slopes). They are somewhat <br />t excessively drained, shallow soils formed in material weathered from Pikes Peak granite, <br /> and they have moderately rapid permeability, very low available water capacity, medium <br /> to rapid runoff, and moderate hazard of water erosion. <br />' Agolls soils aze associated with drainageways and valley bottoms (1-10% slopes). They <br /> are poorly drained, deep soils formed in material weathered from granite, schist, gneiss, <br /> or sandstone, and they have moderately rapid permeability, moderate available water <br />' capacity, slow to medium runoff, and slight hazard of water erosion. <br />' Along the boundary between Forest land and private land, the Teller-Park Soil Survey <br />(see Melissa Trenchik, USDA -National Resources Conservation Services's letter), <br />mapped a complex of two soils: Catamount (dominant soil) and Guffey soil (minor <br />' component). Often the soil classification conducted by the National Forest Service on <br />Forest lands, and by the USDA on private lands do not match, as they use different levels <br />of detail. <br />' Guffey soils (USDA, soil information letter 1/23/98) are associated with mountainsides <br />(15 - 40% slopes). They are well-drained, moderately deep soils formed in material <br />' broken from granite, and they have moderately rapid permeability, very low available <br />water capacity, very rapid runoff, and very high hazard of water erosion. <br />' According to USDA-Natural Resource Conservation Service (NRCS), Canon City, <br />Colorado, the undisturbed area of the old gravel pit has a layer of topsoil and pine litter <br />approximately 0-6" deep at the surface. <br />3.1.1.3 Hydrology <br />' Except for overland runoff that may be associated with heary thunderstorms, the only <br />surface water at the Mule Creek gravel pit is found in the unnamed tributary to Fourmile <br />' Creek that flows between the railroad embankment and Highway 67. Though there are <br />' Hydrosphere Resourcc Consultants, 1002 Walnut Swre 200, Boulder, CO 80702 <br />