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_GENERAL DOCUMENTS - C1981017 (230)
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_GENERAL DOCUMENTS - C1981017 (230)
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Last modified
11/2/2020 10:10:30 AM
Creation date
6/19/2012 2:58:31 PM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981017
IBM Index Class Name
GENERAL DOCUMENTS
Doc Name
Bid Documents (IMP) 1999 Correspondence
Permit Index Doc Type
General Correspondence
Media Type
D
Archive
No
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DRMS Re-OCR
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Signifies Re-OCR Process Performed
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-48- <br /> 2) Areas to be compared to the ,aspen shrubland vegetation type: <br /> Herbaceous cover - 60.8% <br /> Herbaceous production - 67.9 9/m2 <br /> Woody plant density - 100 trees, 5UU shrubs/acre <br /> Species diversity - 2 cool season grass species and 7 forb <br /> species 3% relative cover <br /> 3) Areas to be compared to the spruce/fir parkland vegetation <br /> type: <br /> Herbaceous cover - 4b.81. <br /> Herbaceous production - 56.9 y/m2 <br /> Woody plant density - lUU trees, 5UU shrubs/acre <br /> Species diversity - 5 cool season grass species and 8 forb <br /> species 3% relative cover <br /> The species diversity standard was calculated using the relative cover <br /> method. By this method, the number of species having a relative cover of <br /> 3 percent or greater determines the species diversity standard. <br /> As part of the post-mining land use, the U.S. Forest Service nas <br /> requested that the haul roads be left following downgrading to access <br /> roads. The haul roads will be downgraded to access roads starting in <br /> approximately 1988. Therefore, a reference area is not needed for the <br /> haul roads. <br /> When the mine benches were constructed (starting in 1956) , the excavated <br /> material was spoiled downslope, leaving long slopes at the angle of <br /> repose. Reclamation of these slopes will be difficult. It is <br /> impractical to replace this material on the mine benches and the <br /> disturbance that would ue associated with replacement would be <br /> extensive. The only practical method for reclaiming the outslopes is <br /> reveyetation of the material in-place. uecause of the long steep slopes, <br /> little or no topsoil can be practically replaced. In addition, topsoil <br /> is not available for reclamation of these outslopes. Since no topsoil is <br /> available for revegetation of the outslopes, the reveyetated surface <br /> cannot De practically compared to the uaseline vegetation data. <br /> The only practical alternative for judging revegetation success is to <br /> compare these areas to a successional stage to spruce/fir parkland. <br /> Numerous research studies have shown that, where topsoil is unavailable, <br /> reclaiming to a successional stage of the climax reveyetation type is the <br /> most practical and most environmentally sound method of revegetation at <br /> high altitudes. The applicant has proposed to develop test plots to <br /> determine a practical reveyetation success standard for the mine bench <br /> outslopes. <br /> The scope of this research project was worked out in conjunction with the <br /> Division. The scope of work can be found in Volume 6, Section III-H of <br /> the application. <br />
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