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PROJECT SUMMARY <br /> The following is an evaluation of the erosion control measures on haul roads E, F, and G <br /> of the Mid-Continent Coal Mine near Redstone, Colorado. The evaluations were performed <br /> during the month of July, 1997. A standardized form was created for the evaluation to judge <br /> run-off, erosion type and potential, protection measures and effectiveness, and vegetation <br /> performance. <br /> A brief explanation of each of the criteria on the evaluation sheet is provided below. <br /> 1) Each site was assigned an identification number designating the road and location of a roll <br /> ditch placed across the old haulage road. <br /> 2) Active run-off was evaluated on evidence of sediment movement and other visual indicators. <br /> 3) Evidence of erosion was based on any cutting of the soil by water beyond the established <br /> grade. However, where erosion was only limited to water finding its natural course and not <br /> destructive in nature it was noted and no other measurements were taken. <br /> 4) Potential for future erosion was judged on soil make-up, estimates of run-off, and whether the <br /> erosion had cut to final grade. <br /> 5) Outlet protection and effectiveness was based on type of protection and how or if the <br /> protection held back sediments and slowed the flow of water. <br /> 6) Road erosion was judged on any evidence of uncontrolled water flow creating cuts in the <br /> soil. Riverlets are small, less than 1/2 inch deep cuts in the road that are not any threat to <br /> create future problems. All other types of erosion were photographed and measured. <br /> 7) Vegetation was judged on a scale of 1 to 5. <br /> 5.........thick carpet of growth...........like area meadows. <br /> 4.........well established growth.........80%coverage or better <br /> 3.........average growth for project....60%coverage, clumpy <br /> 2.........clumpy growth, thin...............less than 40% <br /> 1.........poor,very thin to nothing.......less than 10% <br /> 8) Sedimentation distribution and destination was a visual notation of where sediments <br /> appeared to be headed or deposited. <br /> 9) Conditions that have impacted the site were noted and were photographed if a major problem <br /> exists. <br /> Each site with a major erosion problem was photographed. A board with the site number <br /> and date, along with a 9 inch scale is in each shot. Where it was possible, photos of impacts are <br /> also ID'ed. All photos are of the same site until a new ID board appears. <br />