2017-09-20_PERMIT FILE - C1980007A

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 9/20/2017
• Doc Name: E-Seam Projected Operations
• Section_Exhibit Name: Map 51
• Media Type: M
• Archive: Yes

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NOTES:
*Gateroad entries for longwall panels already mined and
proposed to be mined through 2016 are generally aIECEINJED
developed from west to east and then longwall mined
from east to west. These longwall panels will typically
be .mined in order from north to south within the coal �� 2�11
LEGEND lease areas shown,
Permit Area Boundary *.F`or the western longwall panels proposed to be mined
in 2017 through 2021, the southern-most panel is
proposed to be mined first and then the northern
-----�- -- -�-- Coal Lease Boundary (Federal Lease three panels will typically be mined in order from
north to south within the coal lease areas shown. THIS DRAWING WAS PREPARED UNDER ,
C-1362 Excludes 24. 8 Acres MY SUPERVISION AND REPRESENTS
Under Minnesota Reservoir -The projected panel layout and timing were based can INFORMATION THAT IS ACCURATE TO A .�1< _
a.k. a. Independent Reservoir or the best available exploration data, professional THE BEST OF MY KNOWLEDGE
Monument .Dam) judgement, and markets at the time this map was 39r80
prepared. Pillar and panel dimensions may be adjusted c�
within the Projected Potential Mining Area and permit
Approximate limit of the maximum predicted 19' boundary if warranted by actual mining conditions, �'SSrnNA�FN�`
E-seam angle of draw., including coal thickness, coal quality, and geotechnical
conditions to fulfill .federal coal lease maximum
economic recovery requirements. MR-425
Maximum .Projected Areal .Extent of angle-of-draw Approved 9/20/17
Potential Mineable E-seam.,?� 1. See Exhibit 60E The actual E-seam
has been conservatively calculated as 16.3° (See
Appendix B of the Spring 2010 Subsidence Report.) WEST ELK MINEProjected E Seam mining The angle of draw is measured using the greatest
M UNTAIN �
vertical distance between the top of the E seam at the 5174 HWY. 133
nearest edge of each longwall panel and the round ' SOMERSET, CO. 81434
surface elevation equal to the point of no discernable
MINED AREAS subsidence.
2. Also referred to as the "Projected Potential Mining MAP �� � �'—��`�-� PROJECTED OPERATIONS
— PROJECTED POTENTIAL MINING AREA THROUGH 2017 Area. " Although not anticipated (based on available ENGINEERINGIORA WING BY DATE SCALE
data, as above), should mining be extended in this CgC 5125195 1" T- 2000'
PROJECTED EL.� TL' D POTENTIAL ENTIAL MINING V AREA 2018—2 02 n1 mining shown,area and beyond the projected E--sea
the associated projected impacts of subsidence have APPROVED BY 5-7 4 - MR-404 GBG acaa awc NO.
,.......' KG W 06-03-17 - 77z-141 GRG 14E'E401 T MR-425.DWG
been evaluated in Exhibits 55B & 60E. 09-19-17 - MR-425 GBG