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u <br /> <br /> <br />Table 7-6-1 <br />SCS Curve Number <br />Seneca II Mine, Colorado <br />Vegetation Hydrologic Hydrologic <br />Cover Type Cover Conditions Soil Type <br />B C D <br />RECLAIMED AREA (Herbaceous) <br />(Seeded grasses-contoured) 50-80% <br />UNDISTURBED AREAS <br />Oak-Aspen: <br />(Mixed Brush-Aspen) 30-70% <br />70-100% <br />Sage-Grass: <br />(Upland Sagebrush) <br />Pasture or Range <br />(Grassland used for <br />grazing) <br />Herbaceous (Range) <br />(Grass/Weed/Low growing <br />brush) <br />DISTURBED AREAS <br />Paved w/open ditches <br />(including right-of-way) <br />Gravel Roads <br />(including right-of-way) <br />Dirt Roads <br />(including right-of-way} <br />Newly graded areas or <br />bare ground <br />fair to <br />good <br />fair <br />good <br />30-70% fair <br />70-100% good <br />30-70% fair <br />70-100% good <br />30-70% fair <br />70-10U% good <br />69 78 83 <br />48 57 63 <br />30 51 48 <br />51 63 70 <br />35 47 55 <br />69 79 84 <br />61 74 80 <br />71 81 89 <br />62 74 85 <br />89 92 93 <br />85 89 91 <br />82 87 89 <br />86 91 94 <br />Sources: Revised SCS Technical Release No. 55. <br />Communications with the Colorado and Arizona SCS Hydrologist <br />(August 5, 1985). <br />7-6-4 <br />Revised 8/27/86 <br />