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PERMFILE73119
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PERMFILE73119
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Entry Properties
Last modified
8/24/2016 11:22:45 PM
Creation date
11/21/2007 12:34:24 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1994082
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Doc Name
GEOLOGICAL MAPPING YOAST MINE ROUTT CNTY COLO BY AMUEDO & IVEY INC
Section_Exhibit Name
TAB 13 ATTACHMENT 13-6
Media Type
D
Archive
No
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2.2.2 Conclusions Regarding Haul Roads <br /> • <br />a) Water from intense or prolonged rainfall and snowmelt <br />should not cause problems with the facilities planned provided <br />structures are designed and constructed to move the water away from <br />cuts and fills and into natural drainage courses as quickly as <br />possible without increasing erosion. <br />b) Slopes cut in shale bedrock and (or) weathered shale and <br />colluvium, primarily in the first three miles of the alignment, can <br />be steepened beyond the regulatory 1.5:1 maximum, if needed and <br />permitted. This will reduce cut areas exposed to weathering, thus <br />increasing stability. The 0.25:1 limit in bedrock probably can <br />only be approached in the southern one-mile reach, but the steepest <br />slopes should not exceed 0.75:1 until cuts are opened during <br />construction and the potential effects of jointing on stability can • <br />be determined. <br />c) Sandstone and shale bedrock in the last 1.5 miles of the <br />haul-road strike and dip favorably to the alignment. In the field <br />examination bedrock exposures were too restricted to make <br />meaningful evaluations of rock joints. <br />2.2.3 Conclusions Regarding Sedimentation Pond 010 <br />a) Final location of the embankment for the pond was made <br />after test drilling. Limited test-hole data (TH-23) are available <br />to within 100 feet of the embankment centerline; no test holes were <br />drilled along the centerline. <br />b) Data projected from test holes, and from surface geologic <br />information indicate that neither abutment likely will be developed • <br />in unweathered bedrock. Both abutments are in Alluvium on the <br />8 <br />
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