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PERMFILE127218
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PERMFILE127218
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Entry Properties
Last modified
8/24/2016 10:24:20 PM
Creation date
11/25/2007 4:22:24 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980005A
IBM Index Class Name
Permit File
Doc Date
9/28/2007
Doc Name
10-Year, 24 Hour SEDCAD Modeling
Section_Exhibit Name
Tab 07 Appendix 7-6c.1 Addendum 7.6-1A
Media Type
D
Archive
Yes
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<br />i <br /> <br />Seneca II Mine <br />Pond 004 <br />HYDROLOGIC INPUT PARAMETERS <br /> SEDCAD 4 <br /> WATERSHED ID <br /> Structure 3 - SWS1 <br /> Subwatershed -Channel PM-17 Lower <br />Watershed Area: <br />16.2 <br />Curve Number; <br /> HYDROLOGIC CURVE AREA <br />WATERSHED TYPE GROUND COVER SOIL GROUP NUMBER (acres) <br />Reclaim >3 years Good (>70%) B 62 16.20 <br />Total 16.2 <br /> CURVE NUMBER 62 <br />Approved Seneca II Mine curve number (CN) values are presented in Appendix 7-12, Postiming Drainage <br />Control. Values were adapted from Urban Hydrology (or Small Watersheds, Technical Release No. 55 (TR-55), <br />Soil Conservation Service, 1986. <br /> SEDCAD 4 <br /> WATERSHED ID <br /> Structure 3 - SWS1 <br /> Subwatershed -Channel PM-17 Lower <br />Watershed Area: <br />16.2 <br />Sedimentology: k Factor and Control Factor <br /> VEGETATION HYDROLOGIC k CONTROL AREA <br />WATERSHED TYPE COVER SOIL GROUP FACTOR FACTOR (acres) <br />Reclaimed Good (>70%) B 0.16 0.043 16.2 <br />Total 16.2 <br /> 0.16 0.043 <br />The soil erodibiliTy factor, "k-Factor", values were determined based on Seneca II soil survey information (see Tab 9, Exhibit 9- <br />1, Soil Type and Sampling Locations, antl Attachment 9-6) as presented in Soils of Colorado, Loss Factors and Erodibility, <br />Soil Conservation Service, 1983. <br />The Control Factor values were adapted from the Yoast and Seneca II-W permit application packages. These values are <br />presented in each permit in the Drainage and Sediment Control Plan attachment, which is located in Tab 13 of the respective <br />permit documents. The values are based on Renard, et al. (Renard, K.G., Foster, G.R., Weesies, G.A., McCool, D.K., and <br />D.C. Yoder, coordinators, 1996. Predicfing Soil Erosion by Water: A Guide to Converafion Planning wifh fhe Revised <br />Universal Soil Loss Equation (RUBLE). Agricultural Handbook 703. U.S. Department of Agriculture. <br />TR-42 <br />7-6c.1A-21 <br />Revised 09/07 <br />
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