PERMFILE61158

• Permit No: C1981016
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Hydrology calculations
• Section_Exhibit Name: APPENDIX XXI Section XXI.9
• Media Type: D
• Archive: No

WESTERN Sl_OPE CARBON, INC.
• r.o. noK l~xa
SALT LAKE CITY, uT AH ~~110
l01~53~•3400
March 10, 1980
Mr. Dave Holm
Reclamation Specialist
Colorado Mine Land Reclamation
1313 Sherman Street
Denier, Colorado 80203
Deaz Dave;
ETlclosed are Tables 9.2, 21-6, 21.17, and Figures 10.1, I0.2, 21.3 and
21.4 for use in developing a hydrograph. 77~ese tables and figures are the basis
for translating our ten year, 24-hour event of 1,6 inches with a clove number of
89 into .75 inches of runoff. This .75 inches of runoff is the basis for all
of the following calculations in the sediment oorltrol calcvl.ations.
If there are any further questions or any other information required,
• ple~.se don't hesitate to give me a call.
S~i~ncere ,
Al Alramd_son,
Chief Mining F7lgineer
}1IlV be
I]~closures
cc: Tam Pike
Office of Surface Mining
•
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