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-E2
S4-SWS-1
Watershed Area:
8.5 acres
Curve Number:
WATERSHED VEGETATION HYDROLOGIC CURVE AREA
TYPE COVER SOIL GROUP NUMBER (acres)
Reclaimed Fair: 30-70% B 70 6.3
Sagebrush Fair: 30-70% B 51 2.2
Total 8.5
CURVE NUMBER: 65
•
Curve number (CN) values used are approved Seneca II-W CN values (North Area; see Table 13-1 ).
Va-ues were adapted from Urban Hydrology for Small Watersheds, Technical Release No. 55 (TR-55),
Soil Conservation Service, 1986.
TR-59
SEDCAD4
WATERSHED ID
005-E2
S4-SWS-1
Watershed Area:
8.5
Sedimentology: k Factor
HYDROLOGIC AREA
SOIL TYPE SOIL GROUP k Factor (acres)

Reclaimed
35D - Aaberg B
B 0.16
0.24 6.3
2.2
Total 8.5
Weighted k Factor 0.18
The soil erodibility factor, "k-Factor", values were determined based on Seneca II-W soil survey information (see Table
13-2). The values were taken from Soils of Colorado, Loss Factors and Erodibility, Soil Conservation Service, 1983.
Revised 05/07
13-3C-A.22