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• The floodplain of Fish Creek is acknowledged to meet the geomorphic <br />criteria and has been tentatively identified by Dolor infrazed photography <br />as an alluvial valley floor. I>iuioff from Energy Mine 2 drains into this <br />floodplain. Energy Fuels has taken appropriate measures to protect the <br />essential hydrologic functions of the fish Creek floodplain by designating <br />stream buffer zones, and by installing sedimentation ponds (See Existing <br />Structures, Map 34) and ironitor stations (See Energy Mines 1 and 2 Hydrology, <br />Map 13) on the drainages from disturbed areas feeding into and the alluvium <br />of Fish Creek. This role of the flooclplain in collecting, storing, <br />regulating, and yielding water for agricultural activities has been <br />unchanged by mining upslope. With mining at Energy Mine 2 scheduled to <br />cease in 1979, no special emphasis on scientific study has been placed on <br />• the Fish Creek floodplain. However, to ensure that the essential hydro- <br />logic functions of the floodplain will resin unaffected, the system of <br />protective measures already installed will be improved and expanded (See <br />Energy Mines 1 and 2 Hydrology, Map 130). <br />Valley azeas that could be alluvial valley floors near Eckman Pazk <br />and Energy Mine 1 will incur no adverse impact due to mining by Energy <br />Fuels. As docimiented in Section 780.21, pollution of surface and ground <br />water will be prevented by system of sedimentation ponds, sediment control <br />measures, groper mining and reclamation techniques, and frequent monitor- <br />ing of dischan3e water quantity and quality. The hydrologic consequences <br />of mining discussed under Section 780.21(c) will not result in disruption <br />of the essential hydrologic functions of any alluvial valley floors in <br />the adjacent or general area, due to the beneficial effects of water <br />• treatment and flood control provided by the sedimentation ponds and <br />785-9(m) <br />