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4-4 <br />4.1.4 Alluvial Valley Floor <br />• East Salt Creek Valley will have approximately one acre of new <br />disturbance associated with the Munger Canyon operation. Two <br />acres of disturbance presently exists in a ranch access. The <br />additional acre of disturbance will occur when this road is <br />widened for the operational mine. <br />The biotic and abiotic characteristics of the East Salt Creek <br />area have been described in detail in other sections of the per- <br />mit application. Please refer to these sections for detailed <br />information. East Salt Creek is an intermittent stream in a <br />valley 800 to 1,000 feet wide. The soils are torrifluvents and <br />the vegetation is a Greasewood Shrubland. The land use of the <br />general area is rangeland. This undeveloped rangeland has a low <br />• productivity (less than 0.5 AUP1) and is not significant to farm- <br />ing. This fact is substantiated by review of the publication, <br />"Important Farmlands of Garfield County, Colorado" (USDA, SCS, <br />and CSU Experimental Station, 1979) which illustrates that the <br />site has no prime, unique, or important farmlands. Mr. Thomas LV. <br />Priest, State Soil Scientist for Colorado has verified this <br />conclusion (See Appendix L). <br />The limited activity on this undeveloped rangeland will not <br />materially damage the quantity or quality of surface and ground- <br />water systems. Groundwater aquifers will not be disturbed in <br />the valley or the mine (See Section 4.4.2.1). The project will <br />not materially affect the surface hydrology. When the ranch <br />access road is improved for mining, it will not alter the flow <br />A <br />