REP12356

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 1/1/1980
• Doc Name: Mountain Company Soil Bttress West Elk Mine Somerset,CO
• Permit Index Doc Type: Stability Report
• Media Type: M
• Archive: No

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TABLE
(SEE NOTE E1) 11
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PROPOSED BUTTRESS DESIGN
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NOTES
1 ASSUMED WATER TABLE LOCATIONS BASED ON FIELD OBSEnvATIONS
AND SOIL BORINGS.
2. BUTTRESS TO BE CONSTRUCTED FROM LOCAL PIT GRAVEL
3 KEYWAY EXCAVATION AND DRAIN INSTALLATION WILL BE OBSERVED
BY HARDING LAWSON ASSOCIATES FIELD REPRESENTATIVE.
4 CLAY REMOVED FROM SLOPE SHALL BE USED AS A CLAY CAP ON
THE SURFACE OF SOIL BUTTRESS SOIL SHALL BE "TRACK' COMPACTED.
5. KEYWAY SHALL BE EXCAVATED F FEET MINIMUM INTO FIRM MAY OR
DEEPER AS DIRECTED BY HLA REPRESENTATIVE.
6. TEMPORARY STORAGE OF CLAY REMOVED FROM KEYWAY SHALI
BE PLACED ON ELECTRICAL SUBSTATION ACCESS ROAD
I DRAIN LINE LOCATION SHALL BE ESTABLISHED IN THE KEYWAY
AND BASE OF THE EXISTING BIN WALL.
6
0 —0
0 10
NO VERTICAL EXAGGERATION
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NOTES
1 ASSUMED WATER TABLE LOCATIONS BASED ON FIELD OBSEnvATIONS
AND SOIL BORINGS.
2. BUTTRESS TO BE CONSTRUCTED FROM LOCAL PIT GRAVEL
3 KEYWAY EXCAVATION AND DRAIN INSTALLATION WILL BE OBSERVED
BY HARDING LAWSON ASSOCIATES FIELD REPRESENTATIVE.
4 CLAY REMOVED FROM SLOPE SHALL BE USED AS A CLAY CAP ON
THE SURFACE OF SOIL BUTTRESS SOIL SHALL BE "TRACK' COMPACTED.
5. KEYWAY SHALL BE EXCAVATED F FEET MINIMUM INTO FIRM MAY OR
DEEPER AS DIRECTED BY HLA REPRESENTATIVE.
6. TEMPORARY STORAGE OF CLAY REMOVED FROM KEYWAY SHALI
BE PLACED ON ELECTRICAL SUBSTATION ACCESS ROAD
I DRAIN LINE LOCATION SHALL BE ESTABLISHED IN THE KEYWAY
AND BASE OF THE EXISTING BIN WALL.
6
0 —0
0 10
NO VERTICAL EXAGGERATION
Classl,OPermit
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NOTES
1 ASSUMED WATER TABLE LOCATIONS BASED ON FIELD OBSEnvATIONS
AND SOIL BORINGS.
2. BUTTRESS TO BE CONSTRUCTED FROM LOCAL PIT GRAVEL
3 KEYWAY EXCAVATION AND DRAIN INSTALLATION WILL BE OBSERVED
BY HARDING LAWSON ASSOCIATES FIELD REPRESENTATIVE.
4 CLAY REMOVED FROM SLOPE SHALL BE USED AS A CLAY CAP ON
THE SURFACE OF SOIL BUTTRESS SOIL SHALL BE "TRACK' COMPACTED.
5. KEYWAY SHALL BE EXCAVATED F FEET MINIMUM INTO FIRM MAY OR
DEEPER AS DIRECTED BY HLA REPRESENTATIVE.
6. TEMPORARY STORAGE OF CLAY REMOVED FROM KEYWAY SHALI
BE PLACED ON ELECTRICAL SUBSTATION ACCESS ROAD
I DRAIN LINE LOCATION SHALL BE ESTABLISHED IN THE KEYWAY
AND BASE OF THE EXISTING BIN WALL.
6
0 —0
0 10
NO VERTICAL EXAGGERATION
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PROJECTING.
TAG 32640,4
Harding Lawson Associates
MOUNTAIN COAL COMPANY
ENGINEER:
SCALE
La
Engineering and
CHECKED:
AS SHOWN
e _ - _ = Environmental Services
SOIL BUTTRESS BUTTRESS DESIGN
APPROVED:
- - - -- _ tx E15''0 um rerryle
Smm 1sTo
WEST ELK MINE SECTIONS A -A', B -B'
F
o. DATE REVISIONS
BY CHK DATE:
DATE:
Sell Lake CM. UWh BITI1
(8011363A455
SOMERSET, CO
00169"
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