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Revised April 5, 1985 <br />• Alluvial deposits were found in the floodplain of Fish Creek. The <br />streamcourse of Fish Creek is highly sinuous in the adjacent area, and <br />exhibits meanders, oxbows and terraces in the floodplain. The <br />floodplain does terminate however, in one location adjacent" to the <br />Fish Creek Tipple where the stream flows over a bedrock outcrop, as <br />shown on Map 5, Fish Creek Tipple Hydrology. Alluvial deposits exist <br />downstream from the tipple facility. <br />One area within the proposed permit boundary and two areas outside of <br />the proposed permit boundary are acknowledged as meeting the <br />geomorphic criteria of alluvial valley floors. As shown on Map 5, <br />Fish Creek Tipple Hydrology, these areas are: 1) the floodplain of <br />Fish Creek; and 2) the floodplain of Middle Creek and 3) the <br />floodplain of Trout Creek . <br />The first subject area, the floodplain of Fish Creek, receives <br />• drainage from the Fish Creek Tipple. A sedimentation pond has been <br />installed to control the water quality of discharge from the tipple <br />area. <br />The second subject area, the floodplain of Middle Creek, receives <br />runoff from the adjacent Energy Mine No. 3 mining disturbance. A <br />system of diversion ditches and detention basins have been <br />constructed and maintained by the Colorado Yamps Coal Company to <br />prevent discharge of suspended solids to the Middle Creek watershed. <br />The third subject area, the floodplain of Trout Creek, includes Trout <br />Creek downstream of the confluence with Fish Creek. The planned <br />activities will have no affect on this area since the runoff from the <br />Fish Creek Tipple is controlled by sediment control structures prior <br />to entering Fish Creek; Fish Creek is the only tributary to Trout <br />Creek from the tipple area and the tipple area is approximately one <br />mile above the confluence of Fish Creek with Trout Creek. <br />CJ <br />2.06-13 <br />