My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
PERMFILE40093
DRMS
>
Back File Migration
>
Permit File
>
500000
>
PERMFILE40093
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 10:43:08 PM
Creation date
11/20/2007 10:10:12 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981022A
IBM Index Class Name
Permit File
Doc Date
5/14/2003
Section_Exhibit Name
2.05 Minimum Requirements for Operation and Reclamation Plans
Media Type
D
Archive
Yes
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
116
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
Sctrim - 2.05.3 <br />After evaluating several potential disposal sites, the new West Valley coal mine refuse pile site was <br />• selected for future disposal of coal refuse materials. The new disposal site is located in the first <br />ephemeral drainage to the west of the existing Elk Creek surface facilities. This area waz selected <br />because existing slopes are Ratter than several of the other prospective disposal areaz, upslope <br />drainage can be readily diverted, and the area is readily accessible from the existing mine facilities and <br />provides sufficient disposal capacity for currently anticipated future mining operations. Initial <br />development for the West Valley refuse pile waz completed in conjunction with the mine expansion <br />activities initiated in 1995, and constmction of the refuse pile and waste placement will be progressive <br />over the life of this disposal facility. The following sections describe coal refuse characteristics; <br />general coal mine waste pile design, corutruction, operation, and reclamation considerations; and <br />specific design information for the two existing refuse disposal areas. <br />Coal Refuse Characteristics -Generation of coal mine refuse from the Somerset and Sanborn <br />Creek Mmes has been limited to mine development refuse, minor amounts of nxk resulting from <br />roof falls, and coal refuse separated from the coal by the grizzly in the dump station. Current and <br />future mining operations in both the Sanborn Creek and Elk Creek Mmes will generate the same types <br />of refuse materials. The quantities of roof fall materials may, however, be reduced by the change to <br />longwall operations and quantities of coal refuse may be increazed by the introduction of screening <br />operations. Mme roof and Roor sample analyses, which are representative of all coal mine refuse <br />materials, are s~~m~*+~~~Pd in Section 2.04.6 Geology Description. Sample analyses for existing coal <br />mine refuse piles showing similar values, are summarized in the same section for the Elk Creek, <br />Hubbard Creek, and Bear Mute coal mine refuse materials. Bazed on available analysis results, none <br />of the reface materials have been identified az potentially acid- or alkali-fom~ing or toxic-producing. <br />Coal Reface Pile Design, Constnrction, Operation, and Maintenance -Consistent with <br />applicable regulatory requirements under Rules 2.05.3(8), 4.09, and 4.10, coal mine refuse piles have <br />• been designed taking into consideration site topography, geologic conditions; the occurrence of seeps, <br />springs, or surface instability, surface drainage; and the physical and chemical properties of the refuse <br />materials. Specifically, refuse piles are designed to assure thew long-term stability (minunum static <br />safety factor of 1.5), prevent combustion, and avoid potential adverse impacts to public health and <br />safety, water quality, and the environment. General coal mine refrsse pile constmction and operation <br />practices include the following activities: <br />1) Establish upgradient clean-water diversion(s) to intercept and mute undisturbed <br />drainage around the refuse pile area <br />2) Construct perimeter collection ditch(s) and sedimentation control structure(s) or <br />alternative sediment controls, az required to collect and control disturbed area <br />drainage and sediment from the refuse pile area <br />3) Establish road access to and in the refuse pile area <br />4) Qear and grub large vegetation and strip available soil material and rernairting <br />vegetation from the initial pile footprint area <br />5) Construct initial section of underdrain using rock or select granular material and <br />appropriate filter fabric <br />6) Selectively place and compact coal mine refuse materials in successive horizontal lifts <br />(rri?r~m~+rt+ 2-foot thick, compacted to 90 percent of maximum dry deruity) <br />consistent with design specificatioru <br />. 7) Progressively expand the pile from the tce upward by repeating steps 1 through 6 az <br />each bench u completed to it's design elevation <br />PR04 2.05-45 Revised August 2000 <br />
The URL can be used to link to this page
Your browser does not support the video tag.