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REP09878
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REP09878
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Entry Properties
Last modified
8/24/2016 11:39:23 PM
Creation date
11/27/2007 12:15:48 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1996083
IBM Index Class Name
Report
Doc Date
7/27/2007
Doc Name
2nd Qtr 2007 Waste Bank Report
From
J.E. Stover & Associates
To
DRMS
Permit Index Doc Type
Waste Pile/Fill Report
Media Type
D
Archive
No
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BOWIE RESOURCES, LLC <br />Bowie No. 2 Mine <br />Coal Mine Waste Bank Nos. 1, 2 & 4 Inspections - 2nd Quarter 2007 <br />On three occasions, I performed visual inspections of the Bowie No. 2 Mine coal mine waste <br />banks in accordance with Rule 4.10.2. The final inspection occurred on June 22, 2007. This <br />inspection includes Gob Pile Nos. 1, 2 and 4. <br />I, J. E. Stover, P.E., have a wide variety of experience in the design and construction of earth fill <br />embankments. Nothing was observed during the inspections that would indicate the piles have <br />a potential for failure. The gob disposal areas were damp to wet in the active areas. All organic <br />material and topsoil has been removed ahead of the waste bank foundings. The upper diversion <br />ditches were inspected with no problems noted. <br />The rock drain for the gob pile no. 1 was extended during the quarter. See attached pictures. <br />No work was performed on the rock drain for gob pile no. 2 during the quarter. A rock drain is <br />not required at gob pile no. 4. A significant amount of the gob pile no. 2 was covered with three <br />feet of cover and one foot of topsoil during the 4°i quarter 2006. Most of the first and second <br />benches were covered. <br />Most of the coal mine waste was generated from the preparation plant. Approximately 173,000 <br />tons of gob were hauled to the gob piles. Coal mine waste is to be placed in the pile in <br />approximately horizontal lifts no more than 24-inches thick. The coal mine waste is spread and <br />compactive effort is provided by a self propelled sheepsfoot compactor. Compaction tests were <br />performed during the quarter. A total of ten compaction tests were taken on the piles on four <br />separate occasions. Three of the tests failed. The areas where tests failed were reworked. <br />Two of the reworked areas were retested and passed. The third reworked area had not been <br />retested by the end of the quarter (test 135). A test passes if the test attains at least 90% of the <br />maximum dry density attained in a laboratory compaction test in accordance with ASTM D698. <br />Relative compaction test results are enclosed. <br />A failure of the gob pile no. 1 would probably not be a hazard to human life. The pile is located <br />above a large flat bench. The bench is approximately 80 to 150-feet wide directly below the pile <br />Additionally, the gob pile sediment pond is located below the pile. If the coal mine waste bank <br />failed, the material would very likely be contained on the bench below the pile and or within the <br />gob pile sediment pond. <br />A failure of the gob piles no. 2 and 4 would probably not be a hazard to human life. A residential <br />dwelling is located over 300-feet below pile no. 2. The piles are located above Bowie Road. A <br />failure of the piles might damage Bowie Road but would not likely impact the residential dwelling. <br />I certify that to the best of my knowledge and belief, that the fill and ~ ~q'~~ the coal <br />mine waste banks have been constructed as permitted in the de ' o ~Ifp.~RMS. <br />s~ou>~"A; a <br />19230 : * ~ <br />0 <br />James E. Stov~~i. rE •.••~ °? .°°~~®~ Date <br />P.E. No. 19230•mSin~,,,, E~A~'o° <br />
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