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2015-03-12_REVISION - C1981014
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2015-03-12_REVISION - C1981014
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Last modified
8/24/2016 5:58:15 PM
Creation date
3/13/2015 10:23:06 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981014
IBM Index Class Name
Revision
Doc Date
3/12/2015
Doc Name
Proposed Decision and Findings (RN6)
From
DRMS
To
Energy Fuels Coal, Inc.
Type & Sequence
RN6
Email Name
RDZ
MPB
Media Type
D
Archive
No
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establish a diverse self - perpetuating stand of vegetation. Both drill and broadcast seeding <br />methods were used at the site to re- establish vegetation. EFCI has planted shrub clumps on the <br />reclaimed area (see Map 33 of the PAP). Transplants have included junipers, ponderosa pines, <br />skunkbrush sumacs, red cedars, mountain mahoganies and pinyon pines. <br />Ponds 1, 2, and 3 have been removed as part of the initial reclamation performed at the mine. <br />Ponds 4 and 5 and the associated ditches may or may not be removed (reclaimed), pending the <br />results of revision applications to leave them as permanent structures. These ponds can only be <br />removed upon demonstration of successful revegetation. In any event, the refuse pile ditches are <br />to be retained as permanent features. With the approval of Technical Revisions 15 and 32, <br />designs have been submitted, reviewed and approved to allow the Magpie Creek diversion to be <br />permanent. <br />The Southfield Mine began contemporaneous reclamation of the RDA in 1983 when the eastern <br />side of the pile was topsoiled and revegetated. The refuse pile reclamation was completed by <br />covering the remaining pile area with four feet of noncombustible cover, then topsoiling, seeding <br />and mulching. Shrub and tree saplings have been planted on the refuse pile with limited success <br />due to deer and elk foraging on the tender transplants. <br />Reclamation of the loadout began with backfilling and regrading the area between July and <br />November 1996. The loadout was reseeded in 1997 and, after what the Operator deemed <br />inadequate vegetation, again in 1999. The Operator has removed the two ponds at the loadout <br />and graded these areas to approximate original contour. Topsoil has been spread on these areas <br />followed by seeding and mulching. <br />Reclamation of the roads, if not kept in place by landowner requests, will be the following: roads <br />will be ripped and scarified and slopes blended, natural drainage will be re- established, areas <br />disturbed will be topsoiled and re- vegetated if and where possible. The following light use roads <br />are approved in the Southfield Permit, at the request of the landowners, to remain as permanent <br />roads: south mine fan (1.2 miles), monitoring well 65 (0.5 miles), Corley Well (0.04 mile) , <br />Newlin Creek topsoil stockpile (0.7 mile), and parking lot from CR92 (0.03 miles). All light use <br />roads are shown on Maps 17, 18, and 19, and described in Sections 2.05.3 and 2.05.4 of the PAP. <br />Addressing subsidence issues is part of the reclamation efforts by EFCL A report entitled <br />"Subsidence Survey, Subsidence Monitoring, and Subsidence Control Plan Dorchester No. 1 <br />Mine" was prepared by Rocky Mountain Geotechnical (RMG) for Dorchester Coal in 1983. The <br />RMG subsidence data are contained in Exhibit 23 of the PAP. Per TR -36, EFCI was required to <br />conduct subsidence surveys in 2006 and 2013. The 2006 report revealed only minor subsidence, <br />and it was within predicted magnitudes. In the 2013 report, EFCI reported that surface <br />subsidence affects have stabilized, as little or no variation in measured subsidence has occurred <br />at the monitoring locations. <br />Possible subsidence holes between the Thompson Ranch driveway and Newlin Creek channel <br />were identified by the landowner, who notified the Division, in November 2011. Six holes <br />ranging from 20 foot diameter and 15 feet deep, to 5 foot diameter and 5 foot deep had formed <br />overlying an area that had been mined by EFCI as well as an historical mine, the Canon <br />11 <br />
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