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Water availability, quality, the limited extent of the unconsolidated streamlaid deposits <br /> and subirrigated areas, and the incised nature of Calamity Draw make it infeasible and <br /> impractical to construct a flood irrigation system employing gravity drainage. This <br /> conclusion is substantiated by the results of an EPA alluvial valley floor study (EPA <br /> 1977) which addresses most coal mining areas of the west and the fact that flood <br /> irrigation is not being practiced along Calamity Draw. <br /> Finally, based on geomorphic criteria alone, neither Tuttle or Calamity Draws meet the <br /> necessary criteria to be identified as alluvial valley floors, as they display geomorphic <br /> features that are indicative of upland areas rather than alluvial valley floors. <br /> Literature Cited <br /> National Academy of Sciences. 1972. Water Quality Criteria 1972: National Academy of <br /> Engineering. Washington, D.C. p. 335. <br /> Rahn, P.H. 1976. Potential of Coal Strip Mine Spoils as Aquifers in the Powder River <br /> Basin: Project No. 10470025, Old West Regional Commission, Billings, MT. 108 p. <br /> United States E.P.A. 1977. Subirrigated Alluvial Valley Floors: A Reconnaissance of <br /> Their Properties and Occurrence in Coal Resource Lands in the Interior Western United <br /> States. <br /> VanVoast, W.A. and R.B. Hedges. 1975. Hydrogeologic Aspects of Existing and Proposed <br /> Strip Coal Mines Near Decker, Southeastern Montana: Montana Bureau of Mines and <br /> Geology Bulletin 97. 31 p. <br /> 16-14 Revised 04/11/88 <br />