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PRE-MINING AND MINING PLAN MAPS OF AFFECTED LANDS <br />EXHIBIT C <br />Since extensive mining has occurred on the site since 1872, apre-mining contour map of the site is <br />unavailable, however, the approximate contour can be seen from looking at the contour of the <br />surrounding area on Map C-1. The mining azea basically sloped from the South Platte rivet uphill <br />to the east similaz to the grades shown north and south of the existing disturbance. <br />Map C-1 shows the soils, vegetation, and pre-permit (1979} land uses of the site. <br />Map C-2 contours were based on an innovative technique by Enerquest Company of Denver known <br />as an airplane mounted laser. Enerquest was commissioned to do the mapping for the Ducommun <br />Trust and the site was flown in August of 2001. The method uses the laser to bounce off the ground <br />surface and back to the airplane, resulting in extremely accurate mapping over a large area as well <br />as orthographic photos which overlap the mapping data. <br />•~ <br />Alma Placer 7/03 <br />