2011-09-30_PERMIT FILE - C1980007A

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 9/30/2011
• Doc Name: Refuse Pile Expansion East
• Section_Exhibit Name: Exhibit 82 Refuse Pile Expansion East
• Media Type: D
• Archive: Yes

• Refuse Pile Expansion East
Mountain Coal Company, LLC
West Elk Mine
January 2010 JR 120)
Revised March 2010
Revised April 2010
Revised August 2010 (MR 368)
Revised July 2011 JR 127)
Addendum No. 1, October 2011 JR127)
Table of Contents
P:\Mpls \06 CO \26 \06261003 RPE E. Permit Mod Support \WorkFilesTermit Application \Text\Exhibit 82 RPEE design 2011 -U7 -21 Tx 121 KZUI t -UY- 1
29.doc
Certification...................................................................................................................
............................... v
AddendumNo. I ..........................................................................................................
............................... vi
1.0 Introduction .............................................................................................................
............................... 1
2.0 Geotechnical Investigation and Design ...................................................................
............................... 3
•
2.1 Geotechnical Investigation ..........................................................................
............................... 3
2.2 Geotechnical Analysis and Design ..............................................................
............................... 4
2.2.1 Software ............................................................................................
..............................5
2.2.1.1 Seepage Modeling
5
2.2.1.2 Stability Modeling ..........................................................
...............................
2.2.2 Model Parameters .............................................................................
..............................7
2.2.2.1 Refuse ................................................................................
..............................7
2.2.2.2 Colluvium ..........................................................................
..............................8
2.2.3 Model Results ...................................................................................
..............................9
2.2.3.1 Model Results ....................................................................
..............................9
2.2.3.2 Geotechnical Design .........................................................
.............................10
2.3 Subsidence ...................................................................................................
.............................10
3.0 Hydrologic Analysis and Design ..........................................................................
............................... 12
3.1 Hydrologic Water Balance Analysis .........................................................
............................... 12
3.1.1 Hydrologic Inputs ............................................................................
.............................12
3.1.2 Model Parameters ............................................................................
.............................13
3.1.3 Model Results ..................................................................................
.............................14
3.2 Hydrologic and Hydraulic Modeling
14
3.2.1 Hydrologic Inputs ............................................................................
.............................15
3.2.2 Modeling Results .............................................................................
.............................15
•
3.3 Ponds, Impoundments, Other Treatment Facilities and Diversions (Rule 2.05.3(4) & 4.05.6) 15
P:\Mpls \06 CO \26 \06261003 RPE E. Permit Mod Support \WorkFilesTermit Application \Text\Exhibit 82 RPEE design 2011 -U7 -21 Tx 121 KZUI t -UY- 1
29.doc