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Natural Total Vegetation Cover 70.4% Perennial Cover: Grasses, etc. (19.9%) 14.0% Forbs (28.6%) 20.1 Shrubs (42.8%) 30.1% Trees (0.0%) 0.0% Other (8.8) 6.2% Total Vegetation Cover 70.4% Total Perennial Cover 64.2% Litter 25.9% Perennial Cover+Litter 90.1% Canopy (Trees and Shrubs) 30.1 The Universal Soil loss equation (USLE) will be used to calculate in tons/acre/year the soil loss from both the adjacent natural slope and the reclaimed slope. The USLE will demonstrate the ECB stabilized (reclaimed) slope will initially have less sediment loss due to erosion and then gradually, as vegetation establishes, be equal to the adjacent area. USING THE UNIVERSAL SOIL LOSS EQUATION USLE = A = R'K"`LS'C'P The following information is gathered from the U. S. Department of Agriculture, Technical Notes, Agronomy Note #50, dated January 1977. R rainfall factors are assigned by geographical regions based on weather data furnished by the U.S. Weather Service. R values are based on rainfall amount, time, and intensity. In the mountains, R values were computed primarily for valley areas and have been increased to account for run-off from snow melt. The R factor used for this calculation is derived from an iso-erodent map, Figure 2, and is the same for both the reclaimed slope and the adjacent natural slope. K (soil erodibility) factors are assigned to each soil series and they are used to predict the erodibility of a soil and its tolerance to erosion in relation to specific kinds of land use and treatment. Soils having the highest K value are the most erodible. The K value used for this calculation is picked from the U.S. Department of Agriculture Soil Survey, Paonia Area, and is based on the soils classification; Delson Deep Stoney Loam (Harney & Associates vegetation inventory, Map No. DOF0129). The K factor is the same for both the reclaimed slope and the adjacent natural slope. SAE - 33 5/Ol