2010-05-07_PERMIT FILE - C2009087A ‎(31)‎

• Permit No: C2009087A
• IBM Index Class Name: Permit File
• Doc Date: 5/7/2010
• Doc Name: 10 Year, 24 Hour SEDCAD Demonstration
• Section_Exhibit Name: Exhibit 2.05.3-E2 Appendix 2.05.3-E2.D Addendum 2.05.3-E2.D-1
• Media Type: D
• Archive: Yes

Peabody Sage Creek Mine
PECOCO Pond Design
HYDROLOGIC INPUT PARAMETERS
:7
0
Peabody Sage Creek Mine curve number (CN) values are based on CN values previously approved by CDRMS for the
Seneca II Mine, Permit C -80 7003. The CN values are presented in the Seneca II Mine PAP in Appendix 7 -12, Postiming
Drainage Control. Values are adapted from Urban Hydrology for Small Watersheds, Technical Release No. 55 (TR -55),
Soil Conservation Service, 1986.
2.05.3 -E2.D -1.43
Revised 12/09
SEDCAD4
WATERSHED ID
Structure 14 - SWS1
Channel PM -9
Operational Conditions Design
Watershed Area:
294.0
Curve Number:
HYDROLOGIC
CURVE
AREA
WATERSHED TYPE
GROUND COVER
SOIL GROUP
NUMBER
(acres)
Reclaim >3 years
Good ( >70 %)
B
62
294.00
Total
T
294.0
CURVE NUMBER
62
Peabody Sage Creek Mine curve number (CN) values are based on CN values previously approved by CDRMS for the
Seneca II Mine, Permit C -80 7003. The CN values are presented in the Seneca II Mine PAP in Appendix 7 -12, Postiming
Drainage Control. Values are adapted from Urban Hydrology for Small Watersheds, Technical Release No. 55 (TR -55),
Soil Conservation Service, 1986.
2.05.3 -E2.D -1.43
Revised 12/09
SEDCAD 4
WATERSHED ID
Structure 14 - SWS2
Channel PM -9
Operational Conditions Design
Watershed Area:
6.8
Curve Number:
HYDROLOGIC
CURVE
AREA
WATERSHED TYPE
GROUND COVER
SOIL GROUP
NUMBER
acres
Topsoil Stripped
Bare
C
86
6.8
Total
6.8
CURVE NUMBER
86
Peabody Sage Creek Mine curve number (CN) values are based on CN values previously approved by CDRMS for the
Seneca II Mine, Permit C -80 7003. The CN values are presented in the Seneca II Mine PAP in Appendix 7 -12, Postiming
Drainage Control. Values are adapted from Urban Hydrology for Small Watersheds, Technical Release No. 55 (TR -55),
Soil Conservation Service, 1986.
2.05.3 -E2.D -1.43
Revised 12/09