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PERMFILE132428
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PERMFILE132428
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Entry Properties
Last modified
8/24/2016 10:33:11 PM
Creation date
11/26/2007 12:10:34 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M2001001
IBM Index Class Name
Permit File
Doc Date
3/1/2001
Doc Name
PUBLIC COMMENT ON LINE CAMP GRAVEL PIT APPLICATION FN M-2001-001
To
DMG
Media Type
D
Archive
No
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<br />(Item 2 cont.) <br />Contrary to statements made by the applicants, I do not believe that <br />the Dolores River is a warm water fishery as evidenced by its <br />predominant populations of trout species and its migratory salmon runs. <br />Such species will likely be sensitive to and affected by significant elevations <br />in water temperatures. Surely, water held in the sediment basin, even for <br />short extended periods, and exposed directly to sunlight will experience <br />some rise in mass temperature. Surely, water diverted to the sediment basin <br />from the rock crushing operation will carry with it not only some heat <br />transfer generated by the mechanical action of fracturing the rock but <br />very fine sediment particles as well. These very tine particles are not apt <br />to be completely removed by treatment in the sediment basin and will <br />likely remain suspended in the outflow water. This by itself poses the <br />risk that reproductive health of the fishery could be seriously <br />damaged by these fines, which ultimately will settle out as layers of suffocating <br />silt over egg pods at the bottom of the slower moving spawning areas <br />of the river. <br />3) There is a reasonable and substantively based likelihood that mining <br />operations will temporarily lower the water table in the region especially <br />during the dewatering and mining phases of the lower secondary stage <br />gravel. The expected impact of this will be a reduction in yield of nearby water <br />wells even though these wells are located beyond the 600 ft so-called safe <br />or non-impact zone from the closest mine pit boundary.This will also result <br />in further concentration of potentially hazardous dissolved solids in the well <br />water. Lowered water tables may also affect the health of and/or even cause <br />the loss of mature cottonwoods and other desirable woody vegetation because <br />the shallow root systems of these species are unable to reach the water. <br />Increased concentrations of dissolved mineral salts may also pose a toxic <br />threat to trees and vegetation in the immediate riparian region. Both of these <br />conditions very possibly could extend beyond the pit owner's boundaries <br />to neighboring privately held lands. <br />4) Environmental monitoring and documentation procedures are not required <br />or intended. Their absence will provide no assurance that all water <br />discharges into the Dolores River from mining operations will meet <br />acceptable and safe water quality standards and will not insure that these <br />discharges do not in any way result in a diminuitive change in the downstream <br />pre-mining water quality baseline profile of the river. <br />(page 2) <br />
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