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HYDRO25820
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HYDRO25820
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Entry Properties
Last modified
8/24/2016 8:45:26 PM
Creation date
11/20/2007 5:56:11 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1996083
IBM Index Class Name
Hydrology
Doc Date
5/1/2006
Doc Name
2006 Annual Impoundment Inspection
From
J.E. Stover & Associates Inc
To
DMG
Permit Index Doc Type
Prof Pond Certifications
Media Type
D
Archive
No
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BOWIE RESOURCES, LLC <br />Bowie No. 2 Mine <br />New Coal Mine Waste Bank Inspection - 1 ~ Quarter 2006 <br />On six occasions, I performed visual inspections of the Bowie No. 2 Mine coal mine <br />waste bank in accordance with Rule 4.10.2. The final inspection occurred on March 28, <br />2006. <br />I, J. E. Stover, P.E., have a wide variety of experience in the design and construction of <br />earth fill embankments. Nothing was observed during the inspections that would <br />indicate the pile has a potential for failure. The gob disposal area was dry to damp <br />during the final inspection. All organic material and topsoil has been removed ahead of <br />the waste bank founding. The upper diversion ditch was inspected. The west leg of the <br />upper diversion ditch needs to be completely re-constructed. The east leg of the upper <br />diversion ditch needs to be tied back into the sediment pond. Subsequent inspections <br />during April confirmed required work on the upper diversion ditches had been <br />performed. <br />The elevation of the top of the pile is sloped from south to north. The south side of the <br />pile is above the level of the second bench (6070+). The north side of the pile is about <br />60 feet higher. The large rock drain was extended during the quarter. <br />Most of the coal mine waste was generated from the preparation plant. Approximately <br />245,000 tons of gob were hauled to the gob pile. Coal mine waste is to be placed in the <br />pile in approximately horizontal lifts no more than 24-inches thick. The coal mine waste <br />is spread and compactive effort is provided by a self propelled sheepsfoot compactors. <br />Compaction tests were performed throughout the quarter. A total of 33 compaction <br />tests were taken on the pile. All tests passed. The two tests that failed last quarter <br />were retested and passed. 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 <br />D698. Relative compaction test results are enclosed. <br />A failure of the pile would probably not be a hazard to human life. A residential dwelling <br />is located over 300-feet below the pile. The pile is located above SH-133B. A failure of <br />the pile might damage the state highway but would not likely impact the residential <br />dwelling. <br />I certify that to the best of my knowledge and belief, that the fill and other aspects of the <br />new coal mine waste bank have been constructed as permitted in the design approved <br />by the DMG. ~®,'~°~Q el-~sl~; <br />:s'~stover ; ~ ~ <br />No. 19230 a ~$ <br />i ~.® <br />Imo o ~'`~® <br />c °a~oeooo ~ ~ o <br />o~~AJ{2l„ e~i+e <br />
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