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2012-05-30_PERMIT FILE - C1981012A (2)
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2012-05-30_PERMIT FILE - C1981012A (2)
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Last modified
8/24/2016 4:58:29 PM
Creation date
6/5/2012 10:01:38 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981012A
IBM Index Class Name
Permit File
Doc Date
5/30/2012
Section_Exhibit Name
Section 2.05 Operation and Reclamation Plan
Media Type
D
Archive
Yes
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• <br />u <br />(e) Depth of Cover Requirement — Development Waste Pile (DWP) and Refuse <br />Disposal Area <br />Picketwire Processing ( PPLLC) reviewed the suitability of instituting an Alternative Cover <br />Requirement for the DWP and RDA. PPLLC is using an Abandoned Mined Lands (AML) <br />reclamation project adjacent to the New Elk Mine as a basis to develop an alternative <br />practice. AML reclaimed an old mine waste dump in 1990. This dump was active in the <br />1950's and abandoned by CF & I's Allen Mine prior to 1977. It was never included in the <br />New Elk permit. Composition of the pile is believed to be similar to the New Elk DWP. <br />AML completed the reclamation of the waste dump using cover averaging twelve inches of <br />alternative soil material. The reclamation success of this project was evaluated in 2001 <br />using procedures proscribed in the New Elk permit for evaluating revegetation success. <br />This study can be found as Exhibit 36 of the New Elk permit. <br />After almost ten years since completion of the reclamation, the AML area appears to support <br />a healthy stand of perennial grasses and forbs. The site appears to be physically stable with <br />no signs of significant erosion. The area meets the standards for herbaceous production, <br />cool season grass diversity, perennial fortis diversity, and woody stem density. The survey <br />did not meet the standard for percentage cover and species diversity for warm season <br />grasses. <br />The vegetation cover requirement was not met possible for several reasons including soil <br />nutrient deficiencies and grazing. The proposed reclamation plan will include a soil testing <br />and enhancement program and the area will be fenced to restrict domestic grazing activities. <br />The likely explanation for the area not meeting the warm season grass species diversity <br />standard is that warm season grasses were under- represented in the seed mixture used as part <br />of the AML project. The seed mixture was comprised of 13 percent warm season grasses <br />and 70 percent cool season grasses. The seed mix developed as part of the Mine Permit is <br />comprised of 39 percent cool season grasses and 40 percent warm season grasses. As a <br />result, area reclaimed using this seed mixture are expected to meet the species diversity <br />standard. <br />DWP and Development Waste Disposal Area Reclamation Plan <br />1. Side slopes will be graded to no steeper than 2(H):1(V) slope prior to cover <br />placement. <br />2. An average of no less than one foot of cover material including minimum of nine <br />inches of suitable topsoil or topsoil substitute material will be placed over the graded <br />slopes. <br />3. Soil samples will be collected on no greater than 100 foot centers. Each location will <br />be sampled in increments of 0 -9" and 9 -24 ". The upper increments will be analyzed <br />individually for the criteria listed in Table 25A Soil Test Parameters. A <br />representative composite of the 9 -24" increment will be <br />TR -53 <br />2.05 -47 <br />revised 8/30/10 <br />
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