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GENERAL54560
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GENERAL54560
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Last modified
8/24/2016 8:39:47 PM
Creation date
11/23/2007 9:38:08 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981047
IBM Index Class Name
General Documents
Doc Date
12/18/1992
Doc Name
Proposed Decision & Findings of Compliance for RN2
Permit Index Doc Type
Findings
Media Type
D
Archive
No
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The access road to the mine bench was reclaimed using material cast <br />over the side during its construction. <br />In order to guarantee long term stability of the mine bench, the <br />approved reclamation plan was to partially backfill the bench and <br />regrade the portal bench fill in order to reduce the outslope <br />gradient. Therefore, material from other sources had to be used <br />for backfill. Coal waste from the lower stockpile area was hauled <br />to the mine bench, as well as coal waste from the West Elk Mine. <br />The operator also received approval, through the technical revision <br />process, to borrow colluvial material from an area immediately <br />south of the portal bench. <br />Approximately 10,000 cubic yards of material was removed from this <br />site to be used as backfill and as a growth media for the mine <br />bench. The large rocks and steep slopes prohibited initial salvage <br />of growth media. But, soil sampling for fertility, salinity, and <br />texture was done on the reclaimed areas in order to amend the soil <br />to assure revegetation success. Approximate final contours of both <br />the mine bench and the hillside borrow area are shown in Exhibit <br />F-2 of the permit application. The mine bench backfill was placed <br />on approximately a 15 degree slope from the invert of the drainage <br />ditch on the top of the mine bench, which left an approximate <br />35-foot highwall. The hillside borrow area was not excavated to a <br />slope greater than 25 degrees. <br />The stabilization of the slope below the mine bench was done in <br />1985 in accordance with the Mine Bench Stabilization Project. <br />The mine bench is monitored quarterly for stability and water <br />level. The bench has shown to be relatively stable with the <br />exception of a small slump in 1988 and 1989. These were <br />subsequently repaired and reseeded. <br />The backfilling required upon final reclamation includes three <br />sediment ponds and the light-use road. <br />XI <br />Revegetation <br />A. Blue Ribbon's revegetation plan can be found in Section 2.05.3, <br />beginning on page 111 in the permit application. Revegetation <br />areas are shown in Exhibit Q and Exhibit E shows the vegetation <br />communities. <br />The majority of the revegetation work has been completed during <br />initial reclamation in 1986. Areas still to be revegetated include <br />the three sediment ponds, associated ditches, and the light-use <br />road. <br />Two communities will be re-established on the disturbed area. A <br />grassland community will be re-established on the uplands and <br />slopes away from Hubbard Creek, and a riparian community along the <br />creek and flat valley bottom. <br />-31- <br />
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