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PERMFILE69474
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PERMFILE69474
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Entry Properties
Last modified
8/24/2016 11:14:56 PM
Creation date
11/20/2007 10:53:35 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1994082A
IBM Index Class Name
Permit File
Doc Date
9/27/2007
Doc Name
Drainage and Sediment Control Plan
Section_Exhibit Name
Tab 13 Attachment 13-12
Media Type
D
Archive
Yes
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1999 <br />YaattMine *13-12 Drainaee andSedr'ment Coxtrol Plan •4 <br />TABLE 13-12.2 <br />SOIL ERODIBILITY FACTOR <br />Soil Type Soil Texture Soil Erodibility <br />Factor K <br />Routt Cla Loam 0.28 <br />Winevada-S litro Com lex Loam 0.37 <br />Binco Cla Loam 0.28 <br />Coutis Silt Loam 0.37 <br />Aaber Cla 0.28 <br />S litro Loam 0.20 <br />Winevada Loam 0.43 <br />Foidel Silt Loam 0.28 <br />Sk a Silt Loam 0.28 <br />Roxal Variant Silt Loam 0.28 <br />Spoil (Disturbed) Silt and Sand 0.16 <br />3.3 LENGTH-SLOPE FACTOR, LS <br />Input parameters to determine the LS factor were obtained from scaled maps of the watershed areas. <br />Values measured from the scaled maps are shown on the attached SEDCAD4 results. <br />3.4 CONTROL FACTOR, C <br /> <br />The control factor is used to account for vegetative or mulch cover. The values utilized aze shown on Table • <br />13-12.3, Control Factor (Renard et al, 1996) (Schwab and Wazner, 1987): <br />TABLE 13-12.3 <br />CONTROL FACTOR <br />Cover Cover T pe Vegetation Control Factor <br />Undisturbed Aspen/Mountain <br />Shrub 25% canopy (2 m fall height), <br />80% round cover 0.042 <br /> Sagebrush 25% canopy (2 m fall height), <br />80% round cover 0.042 <br /> Herbaceous No cano ,80% round cover 0.043 <br /> Mesic Draina a No cano , 40% round cover 0.1 DO <br />Disturbed Bare Ground None 1.0 <br />3.5 Practice Factor, P <br />The practice factor is used to account for conservation practices fox the watershed. The values utilized aze <br />shown in Table 13-12.4, Practice Factor (Renard et al, 1996)(Schwab and Wazner, 1987): <br />• <br />Montgomery Wol.ron Minixg Grrouf * 165 S. Union Bouleoamf, Suite 460 * Lakewood, Colorado 80228 * (3 031 763-5 14 0 <br />
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