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Revised April 5, 1985 <br />• The Fish Creek floodplain was poorly displayed on the OSM photograph. <br />Fish Creek is seen as a black meandering line at the top of the <br />photograph. The floodplain is shown as a wide, reddish-green area. <br />There appears to be a discontinuous irrigation ditch on the north edge <br />of the floodplain. There are some areas within the floodplain which <br />are more red than others, due to a change in stream gradient and <br />surface moisture. This is seen in the floodplain to the northeast of <br />the Fish Creek Tipple, where the stream-course is braided and highly <br />sinuous. Other areas, such as the light green colored area west of <br />the tipple, exhibit features which indicate heavy grazing use. <br />Despite the heavy agricultural use, the area does not appear to have <br />been flood-irrigated for some time. <br />Judging from this infrared photograph it would spear that irrigation <br />is occurring in the floodplain of Middle Creek, and that irrigation <br />has occurred in the Fish Creek floodplain. These areas have undergone <br />• heavy agricultural use. <br />Alluvial Valley Floor Identification <br />Based on the field investigations described above, one area within <br />the proposed permit boundary has been identified as a possible <br />alluvial valley floor. This area is the Fish Creek floodplain <br />adjacent to the Tipple facility. The essential hydrologic function of <br />all three areas meeting the geomorphic criteria of AVFs and addressed <br />on page 2.06-13 above, is identified as flood irrigation. <br />(4) Application contents for operations affecting alluvial valley <br />floors. <br />(a) If land within the proposed permit area or adjacent area is <br />identified as an alluvial valley floor and the proposed surface coal mining <br />operation may affect an alluvial valley floor or waters that supply <br />alluvial valley floors, the applicant shall submit a complete application <br /> <br />2.06-20 <br />