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Section 785.19 (c) Continued. <br />• <br />of 1980 at the time of year when such measurements would indicate <br />consumptive use of alluvial ground water by plants. <br />AERIAL"INFRARED PHOT06RAPR"ANALYSIS <br />Copies of three aerial infrared photographs of the mine plan and <br />general areas were supplied by the Office of Surface Mining in <br />Denver, Colorado. These photographs are provided in Exhibit 39, <br />Color Infrared Photographs. The photographs were taken in late <br />summer on September 9, 1978. Approximate scale of the photographs <br />is 1:32,000. The three infrared photographs overlap so as to <br />provide stereographic coverage of the existing Marr Mine, the Kerr <br />North area, the ephemeral and intermittent streams draining the <br />mine plan area, and the floodplain of the Canadian River. These <br />photographs were analyzed using visual interpretation techniques to <br />• detect features which could indicate flood irrigation or sub- <br />irrigation. <br />Interpretive factors used in identifying features included the use <br />of color, texture, location and stereoscopic examination for topo- <br />graphic relief. Descriptions and locations of features have been <br />made with the photograph oriented so the photo number (358, 359, or <br />360) is positioned in the upper left corner with the top of the <br />photograph pointing north. <br />Color infrared reflectance (CIR) as recorded on these photographs <br />render a unique color of surface features which differ greatly from <br />their natural color. For example, on photograph number 358, toward <br />the center of the photo in the upper right quarter is a bright red <br />area about 3/8 inches wide and one and one-half inches long running <br />north and south. This bright red color would show up on a natural <br />color photograph as rich green and represents grasses which receive <br />water from irrigation, fudging on the abrupt change from green to <br />785-21 <br />