2020-10-27_PERMIT FILE - C1981035 ‎(23)‎

• Permit No: C1981035
• IBM Index Class Name: Permit File
• Doc Date: 10/27/2020
• Section_Exhibit Name: KII Appendix 15 E.A. Dunn Ranch LBA
• Media Type: D
• Archive: No

ENVIRONMENTAL ASSESSMENT
CCMPACTED NORMAL MINIMUM LIMITS OF COMPACTED SELECT
FILL GRANULAR STRUCTURAL BACKFILL
FOR HEIGHTS OF COVER
OVER 8'-D",PAY CLOSE
SEE NOTE ATTENTION TO NOTE SEE NOTE
..........SURFACE
NATURAL
UNDISTURBED
EMBANKMENT
CONCRETE CONCRETE
FOUNDATION FOUNDATION—
SECTION
NOTE.-TRENCH WIDTH ANDIOR SELECT
FILL ENV ELOPE WIDTH SHALL BE BY
DIRECTION OF THE ENGINEER OF
ISOEPmrE❑BUTGR€ATERoa4FEET vvc�Y APPRROX MAcTE MULTI-PLATE ARCH
LEESERCISTANCEMAYBEREOUIREC EXISTING STREAM BED
DE PENDING UPON SITE-SPECIFIC 18 SPAN 9 RISE
CONUITION5.THIS WIDTH DEPENDS ON
FACTORS SUCH AS THE LATERAL
PRESSURES EXERTED BY THE
STRUCTURE ONTO THE ADJACENT SOIL '
FOR THE GIVEN LOADING CONDITIONS.
THE STRUCTURE SHAPE,THE OLALITY '
OF THE SELECT FILL MATERIAL AND
THE STRENGTH OF THE IN SITU
EM9ANKMENTq RENCH MATERIAL.
THESE FACTORS MUST BE EVALUATED m
BY THE PROJECT ENGINEER FOR EACH w�
SPECIFIC SITUATION.
CROSS-SECTION B-B'
Diagram 2-2. Cross Section View Perpendicular to the Proposed Subsurface Low-Cover Crossing Entries
]]00 ]T00
660 '660
fifi0 ]660
]fi06 7640
7111 7620
]5fl5 756¢
7560 7560
7540 MULTI-PLATE ARCH 7640
To 18 SPAN 9 RISE 120
]s¢¢ ]soo
74ao PROPOSED INCLINE COAL 7 COAL SEAM
]46a 7m 0
744D ]640
7— EN❑ OF WEST MAINS 6¢
o 20a 400 boa eo¢ iaw izoo
CROSS—SECTION A—A'
Diagram 2-3. Cross Section View Parallel to the Proposed Subsurface Low-Cover Crossing Entries
Dunn Ranch Area Coal Lease by Application COC-78825 and Mine Plan Modification EA 2-4