2013-02-25_PERMIT FILE - C1982057A ‎(5)‎

• Permit No: C1982057A
• IBM Index Class Name: Permit File
• Doc Date: 2/25/2013
• Section_Exhibit Name: Tab 20 Backfilling and Grading
• Media Type: D
• Archive: Yes

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EXISTING POSTMINE CHANNEL
3:1 OR-FLATTER
LIMITS OF EXCAVATION
1"1
4 4 MAX. 8'
I
FRONT VIEW
6' DIAMETER PIPE
AX 10'
SPILLWAY
n5'5• 2.5
III 1 2.5
KEYWAY J)
10'
PROFILE VIEW
EXISTING GROUND
TR -67 09 -22 -09
9' ROCK ENERGY
DISSIPATER AT OUTFALL
TOP VIEW
I
i
i
i
/D' ROCK ENERGY
ISSIPATER AT OUTFALL
EXISTING POSTMINE CHANNEL
i
I
ORIGINAL CONTOURS
PLAN VIEW V
• STRUCTURE CAPACITY <2 ACRE —FEET ®iSEP X200
vision 9
• EMBANKMENT — s 81 FEET HIGH il/lInin9 and Sa ea on,
— COMPACTED FILL
— KEYWAY 3' X 10' COMPACTED
I
• SPILLWAY — CONSTRUCTED TO SAME DIMENSIONS AS POSTMINE CHANNEL
(SEE APPENDIX 13 -12.3)
• 2 — 6 INCH PIPES INSTALLED TO PROVIDE STRUCTURE DEWATERING
(OPEN END T WITH SLOTTED RISER ATTACHED TO EACH PIPE)
• EMBANKMENT WILL BE TOPSOILED
• EMBANKMENT WILL BE SEEDED WITH A MESIC DRAINAGE SEED MIX
• EACH STRUCTURE WILL BE FIELD FIT
i
S E^'E
Coal Company
PROJECT-
SCALE SENECA II —W MINE
10 0 ` 10 20 DRAWING nT
TYPICAL
RUNOFF CONTROL STRUCTURE
GSM-- MG\A— .,ORaaa3n 1- 10\Y0ASATMMCM7M".d" r n .