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PERMFILE45211
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PERMFILE45211
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Entry Properties
Last modified
8/24/2016 10:47:36 PM
Creation date
11/20/2007 12:15:20 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982057
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Doc Name
ROAD A LANDSLIDE REMEDIATION PLAN
From
Sedimentation Structure 006 Phase III (Design)
Section_Exhibit Name
TAB 13 ATTACHMENT 13-4B & 13-4C
Media Type
D
Archive
No
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<br />Road A <br />Landslide Remediation Plan <br />History <br />Haul Road A was Constructed during the fall of 1989 and spring of 1990. Pend 006 was <br />constructed in the fell of 1989. The south side of the pond cut slopes experienced minor <br />sloughing during the spring of 1990. Apparently, the fluctuations in the ground water <br />table contributed to the sloughing. Until the recent (4/5/93) slide of the outslope of <br />Road A, the area appeared to be stable. Minor sloughing of other cut slopes in the <br />immediate area suggest that, due to a wet winter, the ground water table rose, creating e <br />zone of saturation which led to the slope failure. <br />lnvestiaat ion <br />A meeting was held in the field on April 13, 1993. This meeting between Colorado Division <br />of Minerals and Geology (CDMG) end Peabody was held to assess the situation end <br />• preliminarily determine the cause, if possible. <br />Subsequent to the meeting, the perimeter of the slide was surveyed, monitoring pins were <br />set, and procedures were established to visually monitor the slide progression. <br />It was noted that the toe of the slide was saturated end water was still seeping at the <br />• <br />time of the inspection. The elide was inspected on May 25, 1993 for seepage end none was <br />observed. <br />Figures 13-46-1 end 13-AB-2 show the limits of the slide area. Figure 13.4B-2 shows the <br />latest location of monitoring points. <br />Monitoring of the slide area began on April 14, 1993. The most recent date (6/4/93) <br />indicates that the rate of movement has subsided substantially over the last several weeks <br />(survey data has been submitted to CDMG). The slide action, due to drying conditions, has <br />decelerated to the point where remedial anion can be actompl fished. <br />13 -G B-1 <br />
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