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REV07607
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REV07607
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Entry Properties
Last modified
8/25/2016 1:08:25 AM
Creation date
11/21/2007 9:44:55 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980006
IBM Index Class Name
Revision
Doc Date
6/13/1995
Doc Name
Findings of Compliance for SL1: Phase I of the 720 Pit
From
DMG
Type & Sequence
SL1
Media Type
D
Archive
No
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Phase I Bond Release 3 Marr Strip Mine <br />720 Pit Area C-80-006 <br />Drainage control, for the 720 Pit area, has been accomplished in compliance with the <br />approved plan. The permanent drainage channels, PD-1 and PD-2 have been established <br />and appear stable and well maintained. The sediment pond associated with the 720 Pit <br />area, Pond A, is operating as designed. Contour furrows have been constructed across <br />the reclaimed slopes. Topsoil has been redistributed throughout the 720 Pit area. Live <br />mulch has been established on the 720 Pit reclaimed areas. The contour furrows and <br />live mulch will intercept overland flow and reduce erosion. Additional refinement and <br />maintenance of these drainage control structures may be required until reclamation <br />vegetation becomes sufficiently established to control erosion. <br />As required by Rule 3.03.2(2), the DMG has made a negative determination that water <br />pollution is occurring. The DMG bases this finding on Kerr Coal Company's proper <br />implementation of designs, maintenance, and monitoring as approved in the permit <br />application. All ponds are designed, at a minimum, to contain and treat surface runoff <br />from a 10-year, 24-hour precipitation event. All runoff from disturbed areas pass <br />through these treatment systems. Past NPDES monitoring demonstrated compliance <br />with applicable effluent limitations. There is no toxic overburden to cause water <br />pollution. Prior to backfilling the 720 Pit, pit water was discharged under an industrial <br />discharge permit. The pit water was a mixture of surface runoff and groundwater that <br />had been in contact with spoils for many years. Bio-monitoring of the discharged pit <br />water met NPDES water quality standards. To date, monitoring has not indicated <br />pollution of groundwater or surface water. <br />The DMG finds that the operator has backfilled the 720 Pit to ensure stability and to <br />eliminate all spoil piles, highwalls, and depressions in accordance with Rule 4.14.1(2). <br />Backfilled material has been placed to minimize adverse effects on ground water as <br />required by Rule 4.14.1(2)(b). The DMG also finds that the 720 Pit area has been <br />regraded to satisfy the approximate original contour requirements of Rules 4.14.1(2)(a) <br />and 4.14.2(1). <br />Based on the above findings and observations, the DMG finds that the Marr Strip Mine <br />is eligible for a Phase I release of the bond applicable to the 720 Pit area, for successful <br />completion of backfilling, regrading and drainage control of the 720 Pit area. <br />
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