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• Agricultural Activities <br />Section 2.04.3 contains a description and map of agricultural activities in the permit and <br />adjacent area. The Land Use Map (Map 17) shows that the historical pre-mining land use of <br />the area has been generally undeveloped rangeland. The description under Section 2.04.3 <br />documents vegetation type in the permit area. Historically, there has not been a developed <br />water supply for agricultural activities to expand upon; however, some limited irrigation is <br />conducted in the floodplains of Goodspring Creek and lower Wilson Creek. <br />Flood Irrigation <br />The irrigated land and topography of those areas that are currently or were historically flood <br />irrigated are shown on the Regional Hydrology Map (Map 10). <br />Subirr~ation <br />The channel fill of the floodplains in the canyon areas should be expected to be comprised of <br />unconsolidated deposits in conjunction with tight, sticky clay material. Impermeable clay <br />surrounding unconsolidated -deposits generally effectively prevents the transmission of water <br />to or from the overlying stream and root zone. Due to the narrow area in the floodplains, the <br />overall slope of the drainage and expected clay deposits, the likelihood of a developed <br />subirrigation in these areas is questionable. <br />• Water Ouaiity and Quantity <br />Since 1974, Colowyo and other private and governmental groups (VTN, BLM, USGS) have <br />collected samples of water flows and water quality. The results of all this work is <br />summarized in section 2.04.7. <br />Aerial Photograph Analysis <br />Aerial photographic coverage of the permit area and adjacent area has been complied by the <br />OSM in Denver, Colorado. The photographs <br />• <br />2.06-12 <br />