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REP14448
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REP14448
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Entry Properties
Last modified
8/24/2016 11:44:20 PM
Creation date
11/27/2007 1:26:44 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981047
IBM Index Class Name
Report
Doc Date
6/28/1985
Doc Name
FILE C-047-81
From
BLUE RIBBON COAL CO
To
MLR
Permit Index Doc Type
STABILITY REPORT
Media Type
D
Archive
No
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(z) <br /> <br />coal waste fill through the second quarter. Final grading on the outslope and <br />the lower bench will change these contours slightly at the end of the coal waste <br />placement. The lower bench continued to be used for access. <br />The placement of cover material was not done during this quarter due to the <br />• <br />• <br />difficulty of dressing up the outslope of the coal waste during the bad weather <br />and due to the colluvium being so wet. The small portions of colluvium placed <br />on the north and south limits of coal waste fill were complicated by the moisture <br />content of the material, The large colluvium abutment on the north end was built <br />up to within a couple feet of the 6400' required. This material came from the <br />inside slope prior to filling. Compaction tests were taken at 4 locations in this <br />fill. Diagram 1 shows the colluvium placement through the second quarter. <br />Five extensions were made to the underdralns during this quarter. The third <br />lateral drain was not felt to be adequate therefore the main drains were extended <br />further up the slope with plans for a fourth drain apP~ximately 10' below the top <br />of the bench. The south drain was discontinued at 6439' due to the vertical slope <br />above it and due dry material encountered at that point . As previously noted <br />the.main drains were dug approximately 3'wide by 3' deep and the lateral drains <br />were dug 3' wide and 3-5' deep. 5upack 4NP was used to line the trenches and <br />3/4" washed gravel was placed in the drains. Partially due to not wanting <br />surface drainage in the drains and partially due to the irregular excavation of the <br />inslope near the ends the drains were not extended to the nutter limits of the bench <br />fill. Diagram 3 shows the extent of the underdrain installation through the second <br />quarter. The north main drain was not exposed during the quarter but was close <br />
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