PERMFILE117384

• Permit No: C1982057
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: GENERAL HYDROLOGY DESIGN METHODS
• Section_Exhibit Name: TAB 13 ATTACHMENT 13-1
• Media Type: D
• Archive: No

• TABLE 1
SCS CURVE NUMBERS
Cover Vegetation Hydrologic Soil Group
Type Condition Cover ~ A B C D
Aspen Undisturbed 30-70 48 57 63
70-100 30 41 48
Mixed Brush Undisturbed 30-70 46 57 63
70-100 30 41 48
Sagebrush Undisturbed 30-70 51 63 70
70-700 35 47 55
Pasture Undisturbed 30-70 69 79 84
70-100 61 74 80
Rangeland Undisturbed 30-70 69 79 84
70-100 61 74 80
Western Wheatg rass/ Undisturbed 30-70 77 81 89
• Alkali Sagebrush 70-100 62 74 85
Steep Mountain Brush Undisturbed 0-70 67 77 83
70-100 48 65 73
Mesic Drainage Undisturbed 70-100 48 57 63
Meadow Undisturbed 0-70 69 79 84
Rock Outcrop Undisturbed 93
Water Unidstur bed 100 100 100
Paved (Incl. R-O-W) Disturbed 89 92 93
Gravel Roads Disturbed 85 89 97
Dirt Roads Disturbed 82 87 89
Facility Disturbed 85 B9 91
Topsoil Salvage Disturbed 85 91 94
Spoil 86 91 94
Craded Spoil Disturbed 86 91 94
Bare Cround Disturbed 86 91 94
Pit Disturbed 86 91 94
Topsoil Replaced Reclaimed 0-30 76 80 84
Revegetated Reclaimed 30-70 70 78 82
Held for Release Reclaimed 70-100 61 74 80
13-1d