2007-10-30_PERMIT FILE - C1982057 ‎(2)‎

• Permit No: C1982057
• IBM Index Class Name: Permit File
• Doc Date: 10/30/2007
• Doc Name: As-Built Report Sedimentation Structure Pond 005
• Section_Exhibit Name: Tab 13 Attachment 13-3C
• Media Type: D
• Archive: No

Seneca II-W Mine
Pond 005
HYDROLOGIC INPUT PARAMETERS
SEDCAD4
WATERSHED ID
005-E3
S3-SWS-1
Watershed Area:
83.4 acres
Curve Number:
WATERSHED VEGETATION HYDROLOGIC CURVE AREA
TYPE COVER SOIL GROUP NUMBER (acres)
Sagebrush Fair: 30-70% B 51 19.5
Sagebrush Fair: 30-70% C 63 15.2
Sagebrush Fair: 30-70% D 70 11.5
Mixed Brush Fair: 30-70% B 48 28.6
Mixed Brush Fair: 30-70% D 63 2.8
Wheatgrass/ Alkali
sagrusch Fair: 30-70% B 71 4.2
Gravel Road B 85 1.8
Total 83.4
CURVE NUMBER: 57
Curve number (CN) values used are approved Seneca II-W CN values (North Area; see Table 13-1).
Values were adapted from Urban Hydrology for Small Watersheds, Technical Release No. 55 (TR-55),
Soil Conservation Service, 1986.
SEDCAD4
WATERSHED ID
005-E3
S3-SWS-1
Watershed Area:
83.5
Sedimentology: k Factor
HYDROLOGIC AREA
SOIL TYPE SOIL GROUP k Factor (acres)
X8D - Winevada-Splitr B 0.25 2.87
11 D - Binco D 0.27 14.29
12C, 12D -Buckskin C 0.25 17.85
35C, 35D - Aaberg D 0.24 31.22
103 - Roxal/Lymanson-Starman B 0.23 15.4
Disturbed 0.16 1.8
Total 83.5
Weighted k Factor 0.24
TR-59
13-3C-A.20

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Revised 05/07