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<br />3 <br />Alltwial Valley Floors <br />5. a. It is not an accepted regional practice to irrigate <br />alluvial bodies of extent comparable to those which <br />occur along Pine Gulch when there is no water <br />available for irrigation. Fred M. Johnson, C.P.G., <br />Clifford M. Schmid, L.S., and Dan Mathews, <br />Reclamation Specialist of the M.L.R.D., determined <br />and mutually agreed, on May 30, 1990, that there was <br />not sufficient alluvial groundwater within the <br />permit area of Pine Gulch, to enhance the <br />productivity of agriculturally useful vegetation. <br />It was further agreed that Pine Gulch within the <br />permit area was neither an AVF nor a renewable <br />resource. <br />b. The confluence of Pine Gulch with Hay Gulch is an <br />alluvial valley floor (AVF), but irrigated by <br />diversion ditches originating at the La Plata River. <br />The ditch right owners do not depend on flood <br />irrigation or sub-irrigation. The S.C.S. (Cindy <br />Dvergsten) feels that any sub-irrigation at the' <br />confluence would be from the Hay Gulch high water <br />table. Because of support planned for PIne Gulch <br />within the permit area and insufficient alluvial <br />groundwater to enhance productivity of <br />agriculturally useful vegetation, there will be no <br />mining related impacts to the quality or quantity <br />of water from Pine Gulch. <br />c. The alluvial deposits along Hay Gulch have been <br />added to the Regional Geology Map. <br />