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REV89917
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REV89917
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Entry Properties
Last modified
8/25/2016 3:11:44 AM
Creation date
11/21/2007 10:57:39 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1984063
IBM Index Class Name
Revision
Doc Date
2/27/1989
Doc Name
EASTSIDE MINE C-84-063 TR-05 REDESIGN OF DITCHES REFUSE DISPOSAL AREA
From
MLRD
To
EASTSIDE COAL CO
Type & Sequence
TR5
Media Type
D
Archive
No
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.\k: .. _ ~ <br />III IIIIIIIIIIIIIIII <br />~~~°(~ STATE OF COLC,~ ~ ,L <br />' .l~°I Roy Romer, Governor <br />.~. <br />' /B76' ~~ nO <br />DEPARTMENT OF NATURAL RESOURCES W <br />MINED LAND RECLAMATION DIVISION <br />FRED R. BANTA, Dlrsctor <br />February 27, 1989 <br />Ms. Linda Limbach <br />Eastside Coal Company <br />P.O. Box 161 <br />Silt, Colorado 81652 <br />RE: Eastside Mine (C-84-063) TR-05 <br />Re-design of ditches, refuse disposal area. <br />Dear Ms. Limbach: <br />As I mentioned in our telephone conversation on February 24, 1989, I am <br />sending you the parameters I used in my calculations: <br />Slope Length <br />Relief <br />Slope <br />Area <br />Slope Adj Factor <br />Equiv. Area <br />Real/Eq Area <br />Eq. Runoff In. <br />CN <br />Runoff <br />Area 1 (refuse i1e) <br />200 ft~ <br />25 ft. <br />.15 <br />2.3 ac. <br />.99 <br />2.3 ac. <br />1.0 <br />5.5(1) <br />89 <br />1.72 <br />Area 2 (Pinyon-Juniper) <br />1100 ft. <br />350 ft. <br />.32 <br />11.0 ac. <br />1.10 <br />16 ac. <br />.69 <br />26(1) <br />82 <br />1.22 <br />(1) From Fig. S-lA, "Procedures for calculating peak flows in Colorado", <br />SCS, p. 15. <br />Peak CFS=Runoff*Slope Adj Factor*Real/Eq Area*Eq Runoff In. <br />Peak (Area 1) = 1.72 * .99 * 1 * 5.5 = 9.36 cfs <br />Peak (Area 2) = 1.22 * 1.1 * .69 * 26 = 24.07 cfs <br />215 Centennial Building, 1313 Sherman Street Denver, Colorado 80203.2273 Tel. (303) 866.3567 <br />
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