2012-07-10_PERMIT FILE - C1981041 (5)

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PR -5 LS (length and percent slope) factors account for the length and percent slope. These factors are taken from Figure 4. Length of slope begins at the top of the micro watershed. This is usually at the top of a hill, ridge, terrace or diversion. The length of slope is considered to end for a given field at one of the following places: (1) the point where the slope decreases to the extent that deposition occurs, (2) the point where runoff enters a well- defined channel, gully, terrace or diversion , or (3) where water leaves the field. Greasewood Reference Area - LS Factor The LS factor for the Greasewood Reference Area is based on an average 10.61-11V Slope and an average vertical height of 10.1 feet and average length of slope is 107 feet based on eight flow lines located in the reference area. The length of slope of run -off from the reference area was increased to a length of 339.5 feet to make it comparable to the Cameo Topsoil Piles. Average Length 339.5 Feet Average Slope 9.4% Percent Slope (S) 8.0% 9.4% 10.0% 300 1.800 2.220 2.400 339.5 "LS" Factor 2-354JI 400 2.000 2.560 2.800 Cameo Topsoil Piles - LS Factor The LS factor for the Cameo Topsoil Pile Area is based on an average 37.7H:1 V slope at an average vertical height of 9.0 feet based on four flow lines cut across the reclaimed landscape. Average Length 339.5 Feet Average Slope 2.7% Percent Slope (S) 2.0% 2.7% 3.0% 300 0.280 0.364 0.400 339.5 "LS" Factor 0.379 400 0.310 0.401 0.440 Shadscale Reference Area - LS Factor The LS factor for the Shadscale Reference area is based on an average 2.1 HAV Slope and an average vertical height of 166 feet and average length of slope is 347 feet based on five flow lines located in the reference area. The length of slope of run -off from the reference area was reduced to a length of 127.3 feet to make it comparable to the Cameo Refuse Disposal Area #2. Average Length 127.3 Feet Average Slope 47.6% Percent Slope (S) 40.0% 47.6% 50.0% 120 14.000 18.560 20.000 127.3 "LS" Factor 18.560 130 14.000 18.560 20.000 Cameo Refuse Disposal Area #2 - LS Factor The LS factor for the Cameo Refuse Disposal Area #2 is based on an average 4.04H:1 V slope at an average vertical height of 31.5 feet based on four flow lines cut along the lowermost bench. Average Length 127.3 Feet Average Slope 24.8% Percent Slope (S) 20.0% 24.8% 25.0% 120 4.500 5.940 6.000 127.3 1 "LS" Factor 6.641 130 4.500 6.900 7.000 A14 -13-5 02/12