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• Agricultural Activities <br />Section 2.04.3 contains a description and map of agricultural <br />activities in the permit and adjacent area. The Land Use Map (Map <br />17) shows that the historical pre-mining land use of the area has <br />been generally undeveloped rangeland. The description under <br />Section 2.04.3 documents vegetation type in the permit area. <br />Historically, there has not been a developed water supply for <br />agricultural activities to expand upon; however, some limited <br />irrigation is conducted in the floodplains of Goodspring Creek and <br />lower Wilson Creek. <br />Flood Irrigation <br />The irrigated land and topography of those areas that are currently <br />or were historically flood irrigated are shown on the Regional <br />Hydrology Map (Map l0). <br />Subirriqation <br />The channel fill of the floodplains in the canyon areas should be <br />• expected to be comprised of unconsolidated deposits in conjunction <br />with tight, sticky clay material. Impermeable clay surrounding <br />unconsolidated deposits generally effectively prevents the <br />transmission of water to or from the overlying stream and root <br />zone. Due to the narrow area in the floodplains, the overall slope <br />of the drainage and expected clay deposits, the likelihood of a <br />developed subirrigation in these areas is questionable. <br />Water Quality and Quantity <br />Since 1974, Colowyo and other private and governmental groups (VTN, <br />BLM, USGS) have collected samples of water flows and water quality. <br />The results of all this work is summarized in Section 2.04.7. <br />Aerial Photograph Analvsis <br />Aerial photographic coverage of the permit area and adjacent area <br />has been complied by the OSM in Denver, Colorado. The photographs <br />• <br />2.06-12 <br />