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PERMFILE56724
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PERMFILE56724
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Last modified
8/24/2016 10:59:14 PM
Creation date
11/20/2007 5:09:56 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1994082
IBM Index Class Name
Permit File
Doc Date
9/27/2007
Doc Name
10-Year, 24 Hour SEDCAD Demonstration
Section_Exhibit Name
Tab 13 Attachment 13-3A.2 Addendum 13-3A-A
Media Type
D
Archive
No
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YOAST MINE <br />Pond 10 -Watershed W-1 <br />HYDROLOGIC INPUT PARAMETERS • <br /> SEDCAD 4 <br /> WATERSHED ID <br /> Structure 1 - SWS1 <br /> Watershed W-1 <br />Watershed Area: <br />421.6 <br />Curve Number: <br /> VEGETATION HYDROLOGIC CURVE AREA <br />WATERSHED TYPE COVER SOIL GROUP NUMBER acres <br />AspeNMountain Brush Good (>70%) C 41 252.66 <br />Aspen/Mountain Brush Good (>70%) D 48 34.09 <br />Herbaceous Good (>70%) D 85 18.15 <br />Mesic Drainage Fair (30%<x<70%) C 81 4.89 <br />Sagebrush Good (>70%) C 47 37.36 <br />Sagebrush Good (>70%) D 55 4.08 <br />Rock Outcrop Bare D 98 3.27 <br />Reclaimed Fair (30%<x<70%) B 71 14.58 <br />Haul Road Bare C 91 52.56 <br />Tota! 421.6 <br /> CURVE NUMBER 52 <br />Curve number (CN) values used are approved Yoast Mine values (see Table 1312.1). Values were . <br />adapted from Urhan Hydrology for Small Watersheds, Technical Release No. 55 (TR-55) ,Soil Conservation <br />Service, 1986. <br /> SEDCAD 4 <br /> WATERSHED ID <br /> Structure 1 -SWS1 <br /> Watershed W-1 <br />Watershed Area: <br />421.6 <br />Sedimerttology <br />k Factor and Control Factor: <br /> VEGETATION HYDROLOGIC k CONTROL AREA <br />WATERSHED TYPE COVER SOIL GROUP FACTOR FACTOR acres <br />AspeNMountain Brush Good (>70%) C 0.28 0.042 252.66 <br />AspeNMountain Brush Good (>70%) D 0.20 0.042 34.09 <br />Herbaceous Good (>70%) D 0.19 0.043 18.15 <br />Mesic Drainage Fair (30%<x<70%) C 0.28 0.100 4.89 <br />Sagebrush Good (>70%) C 0.37 0.042 37.36 <br />Sagebrush Good (>70%) D 0.20 0.042 4.08 <br />Rock Outcrop Bare D 0.1 1.0 3.27 <br />Reclaimed Fair (30%<x<70%) B 0.16 0.043 14.58 <br />Haul Road Bare C 0.16 1.0 52.56 <br />Total 421.6 <br /> 0.26 0.17 <br />• <br />TR-35 13-3A-A.20 Revised 08/07 <br />
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