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deposited soil types. However, no_ mottling gleying or other indication <br />' ~ of saturated conditions [h a[ would indicate subirrigation were <br />encountered during [he soil survey. A negative finding of prime farmland <br />by the SCS also states that subirrigation does no[ occur (Appendix B). <br />No irrigated agriculture exists on the mine plan area. Water in <br />ephemeral drainages is present only in direct response to precipitation <br />or snowmel[. Thus no water would be available during periods of soil <br />water depletion for irrigation. Topography of [he site (see Exhibit IV) <br />would make irrigation very difficult. <br />5.2 Williams Fork and Yampa Rivers <br />;~ <br />• The flood plains of both the Yampa and Williams Fork rivers are underlain <br />in spots by quaternary alluvial deposits. Land use of the flood plain of <br />the Yampa in [he vicinity of Craig includes irrigated hayland and <br />pasture land, The flood plain of the Williams Fork at the confluence of <br />[he Williams Fork and Yampa Rivers and east of Hamilton has irrigated <br />agriculture. Hardaway et a1 (1977) found that an AVFs existed and was <br />associated with the Yampa River, Depending upon it's significance to <br />agriculture these Flood plains of these rivers where it is underlain by <br />alluvium may be alluvial valley floors. <br /> <br />•1 <br />-43- <br />