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GENERAL48106
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Last modified
8/24/2016 8:23:57 PM
Creation date
11/23/2007 4:06:41 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981038
IBM Index Class Name
General Documents
Doc Date
7/30/1993
Doc Name
PROPOSED DECISION & FINDINGS OF COMPLIANCE FOR PR3
Permit Index Doc Type
FINDINGS
Media Type
D
Archive
No
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J <br />Valley Mine surface facilities. This terraced pile is proposed to <br />accommodate 130,000 cubic yards of waste and fulfill the mine's waste <br />disposal requirements for a period of 8.8 years. In January 1988, <br />64,417 tons of waste had been disposed of at the West Ridge site. <br />Approximately 25,000 tons were added to the pile in 1987, due to <br />development in the West Mine area. This exceeds the expected average <br />annual waste production estimates. This rate of waste production is <br />not expected to continue. <br />Phase II consists of an analogous, but smaller, waste pile to be <br />constructed on the "East Ridge" site, immediately east of the Phase I <br />pile. Phase II will contain 60,500 cubic yards of waste and require <br />approximately four (4) years to construct. Phases I and II are <br />separated by a natural ephemeral drainage channel. <br />Phase III of the proposed waste pile plan consists of a plan to fill <br />the drainage separating East and West Ridges, as well as the <br />imposition of additional 530,000 cubic yards of material on top of the <br />original Phase I and II waste piles. This is projected to occur over <br />a life span of thirty-six (36> additional years. The total life of <br />the three phases will be forty-eight (48) years and encompass the <br />disposal of 720,500 cubic yards of processed waste. <br />The Division has approved Phase I of the proposed waste structure. <br />Phase I contains sufficient waste disposal area to accommodate the <br />mine's waste production during the next five to eight years. However, <br />Phases II & III of the proposed structure will have to be approved <br />prior to approval of future permit periods. There are several <br />specific aspects of the conceptual plans for Phases II and III which <br />may require significant effort to resolve. The applicant proposes a <br />subdrain to accommodate the surface flow of the ephemeral channel <br />separating the East and West Ridges. This subdrain will require <br />considerable geotechnical and hydrogeological justification and <br />specific final engineered design. In addition, stability analyses for <br />Phases II and III will be required prior to approval of either of <br />these facilities in later permit terms. COVCC understands that mining <br />can proceed only as long as a waste disposal site with capacity is <br />available and permitted by the Division. <br />In.September 1990, the operator began removing material from the West <br />Ridge waste pile and distributing it as product to a nearby power <br />plant. This operation ceased in October 1991 after approximately <br />40,000 cubic yards had been removed. Placement of material onto the <br />West Ridge waste pile resumed in 1992. The pile currently holds <br />approximately 65,000 cubic yards of coal waste material. <br />Reclamation of the waste pile has been and will remain concurrent with <br />its construction. As outlined in Sections 2.05.4(2)(a) and (e), a <br />3.75-foot non-toxic material/0.75-foot topsoil berm is constructed on <br />the outslopes after completion of each lift. The outslopes are <br />fertilized and seeded each fall. <br />The disposal area will be inspected on a regular basis by a qualified <br />professional specialist under the direction of the professional <br />-33- <br />
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