Laserfiche WebLink
4-4c <br />• ° Office Study and Review of Aerial Photographs. <br />Two sets of low altitude color photographs and one <br />set of infrared aerial photographs were studied <br />preliminary to the field work. <br />Field Reconnaissance and Mapping. <br />Field work was accomplished to deliniate the alluvial <br />valley floors and other geomorphic units in the area. <br />The graphical presentation of AVF identification has <br />been made on a U.S.G.S. topographic map on the scale <br />of 1:24,000 which should prove to be a sufficient <br />scale for the purpose of this study. The use of the <br />U.S.G.S. map for this purpose is in accordance with <br />the Region V Office of Surface Mining Guidelines <br />• dated June 11, 1980. <br />Geomorphic mapping of the area and the evaluation of <br />the AVF were supplemented by the excavation of five <br />test pits located at different points, mostly in <br />side valleys of the East Salt Creek. In addition to <br />these test pits, results of ground water measurements <br />from four monitoring wells located close to the con- <br />fluence of the Munger Creek were used for the purpose <br />of the study. <br />GEOMORPHIC CRITERIA <br />ALLUVIAL SEDIMENTS OF EAST SALT CREEK <br />The Alluvial Sediments of the East Salt Creek comprise the <br />single, most important geomorphic unit in the area. They comprise <br />