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2012-07-12_REPORT - C1996084
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2012-07-12_REPORT - C1996084
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Last modified
8/24/2016 5:03:22 PM
Creation date
7/12/2012 2:26:22 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1996084
IBM Index Class Name
REPORT
Doc Date
7/12/2012
Doc Name
1st Quarter 2012 Quarterly Certification of Excess Spoil Fills
From
New Elk Coal Company
To
DRMS
Permit Index Doc Type
Mine Inflow Reports
Email Name
JHB
DIH
Media Type
D
Archive
No
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FILL PLACEMENT <br />COVER MATERIAL <br />Spoil Fill 7 <br />3/31/2012 <br />Page 2 <br />CDMG regulations require that spoil be "placed in horizontal lifts in a controlled manner, concurrently <br />compacted as necessary to ensure mass stability ". Maximum lift thicknesses are not specified. As indicated <br />by previous inspection reports, lifts were placed in accordance with plans specified by CTL Thompson. <br />Spoil material was transported to the fill area using a combination of trucks and dozers. Left thicknesses of <br />up to 50' were placed within the area removed from the fill face by more than 50 ft. Thinner lifts of 6 -8 ft. <br />with leveling and compactive effort supplied by dozers and trucks was utilized as fill placement advances to <br />within fifty feet of the slope face. No fill placement occurred during this quarter. <br />As documented by previous inspection reports, cover placement, seeding and mulching occurred during the <br />second quarter 2002. During the first quarter 2004 additional topsoil was transported to the upper -most <br />portion of the fill area lying between the area seeded in 2002 and the lateral ditch placed at the upper <br />perimeter of fill 7. The northeast portion of this area, approximately 1.60 acres, was final graded and <br />seeded in August of 2006. <br />STRUCTURAL INTEGRITY <br />The entire excess spoil fill facility was examined for signs of failure and instability such as tension cracks, <br />ground movement, springs and seeps, and standing water. No indication of potential instability was <br />observed. <br />DOCUMENTATION AND OTHER OBSERVATIONS <br />Late winter conditions are evident with vegetation is dormant. No snow cover remains on this south facing <br />slope. Overall the site is in good but extremely drycondition. <br />CERTIFICATION <br />Inspection was conducted by Ronald G. Thompson, a qualified professional and MSHA certified inspector <br />of earth and rock -fill embankments and impoundments, under the direction of Mr. Charles McGlothlin, a <br />registered professional engineer licensed in the State of Colorado. <br />This is to certify, to the best of my knowledge and belief, that Fill No. 7 construction and placement, as <br />noted since the previous certification and as determined during this inspection and by discussions with mine <br />personnel, is in accordance with designs as proposed by CTL Thompson in their report dated April 27 and <br />amended July 27, 2001 and as approved by the Division of Minerals and Geology. <br />Ronald G. Thompson ( 2harles W. McGlothlin <br />Professional Engineer <br />Inspector <br />
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