PERMFILE63399

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: NH2 1996 Section 2.05.3‎(3)‎ Mine Facilities
• Media Type: D
• Archive: Yes

• TABLE 2.05.3(3)-1
SCS CURVE NUMBERS
FOR NEW HORIZON MINE
MONTROSE COUNTY, COLORADO
HYDROLOGIC SOIL GROUP
LAND USE - HYDROLOGIC
VEGETATION TYPE CONDITION A B C
Undisturbed Areas:
Cultivated Land Poor 76 84 88
(Small Grain) Good 75 83 87
Rotation Meadow Poor 75 83 85
(Contoured) Good 69 78 83
Meadow (Riparian) Good 58 71 78
Pasture or Range Poor 79 86 89
Fair 69 79 84
Good 61 74 80
Juniper -Grass Poor 75 85 89
Fair 58 73 80
Upland Sagebrush -Grass Poor 67 80 85
Fair 51 63 70
•
Residential:
1/8-acre lots Average 85 90 92
1/4-acre lots Average 75 83 87
1/3-acre lots Average 72 81 86
1/2-acre lots Average 70 80 85
1.0-acre lots Average 68 79 84
Disturbed Areas:
Newly Graded Areas Average 86 91 94
Paved Roads Average 89 92 93
Gravel Roads Average 85 89 91
Dirt Roads Average 82 87 89
Reclaimed Areas:
Herbaceous Pre-Law (1977) Average 80 87 --
Herbaceous Post-Law (1977) Average 71 81 --
Source: USDA-SCS Technical Release 55 (2nd Edition), June, 1986

(REVISED 12/00) 2.05.3(3) -10