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2012-01-06_PERMIT FILE - C1982057A (4)
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2012-01-06_PERMIT FILE - C1982057A (4)
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Last modified
5/10/2017 10:21:26 AM
Creation date
3/7/2012 8:08:50 AM
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Template:
DRMS Permit Index
Permit No
C1982057A
IBM Index Class Name
Permit File
Doc Date
1/6/2012
Section_Exhibit Name
Tab 17 Probable Hydrologic Consequences
Media Type
D
Archive
Yes
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TABLE 17-21 <br />Premining and Postmining Geomorphic Parametersl <br />of Basins to be Affected by Mining <br /> 005 Gulch 006 Gulch <br />Parameter Premining Postmininq Premining Postmininq <br />Watershed Area (mi=) 1,30 1.30 1.87 1.87 <br />Longest Stream Channel (mi) 1.98 1.98 3.13 3.07 <br />Elevation Change of Longest <br />Channel (ft) 1025 1025 1125 1125 <br />Sinuosity of Longest Channel (ft) 1.05 1.05 1.10 1,08 <br />Circularity Ratio (mi/mi) .559 .559 .493 ,493 <br />Drainage Density (mi/mi=) 7.92 7.17 7.32 7.70 i <br />Constance of Channel Maintenance <br />(mil/mi) .126 .139 .137 ,130 <br />Stream Order 2 2 4 4 <br />• Mean Basin Elevation (ft)2 7274 7268 7461 7467 <br />3 <br />Average Watershed Slope (ft/ft) .221 .217 .237 .241 <br />Main Stream Channel Gradient (ftlf t) .0980 .0980 .0681 .0694 <br />Drainage Pattern Parallel and Dend ritic ~~, <br />1 <br />Parameters and their significance are discussed in Br akensiek et al. (1979) and Morisawa <br />(1968) <br />2Methodology used to determine Mean Basin Elevation presented in Kircher et al. (1985) <br />3Methodology used to determine Average Watershed Slope presented in Williams and Berndt <br />(1976) <br /> <br />55 <br />
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