2022-10-19_PERMIT FILE - C1981018 ‎(2)‎

• Permit No: C1981018
• IBM Index Class Name: Permit File
• Doc Date: 10/19/2022
• Doc Name: Refuse Pile Soil Stockpile Inventory
• Type & Sequence: TR74
• Section_Exhibit Name: Map 166
• Media Type: M
• Archive: No

SUBSOIL RPA
(2.9 DISTURBED ACRES)
TOPSOIL RPA
27.9 ACRE-FEET
(2.95 DISTURBED ACRES)
SUBSOIL RPA
56.7 ACRE-FEET
TOPSOIL RPA
30.1 ACRE-FEET
TOPSOIL 5A
63.56 ACRE-FEET
6
SUBSOIL 4
26.62 ACRE-FEET
5
TOPSOIL 4
42.05 ACRE-FEET
4
SUBSOIL 2-3
58.99 ACRE-FEET
3
SUBSOIL 2-3
49.41 ACRE-FEET
2
TOPSOIL 2-3
25.8 ACRE-FEET
1
8
9
10
11
SUBSOIL 5A
97.59 ACRE-FEET
7
RP-A
16.52 ACRE-FEET
RP-1
(RECLAIMED)
(95.70 DISTURBED ACRES)
RP-2345
(109.32 DISTURBED ACRES)
HAUL
R
O
A
D
LEGEND
DISTURBED AREA TO BE RECLAIMED
PILE DESIGN MAJOR CONTOURS (25' INTERVAL)
PILE DESIGN MINOR CONTOURS (5' INTERVAL)
EXISTING GROUND MAJOR CONTOURS (25' INTERVAL)
EXISTING GROUND MINOR CONTOURS (5' INTERVAL)
NEW DISTURBED AREA (5.83 ACRES)JLT4/13/22O:\Engineering Projects\Refuse Area 2345\Drawings\Map 166 Soil Stockpile Inventory.dwgBLUE MOUNTAIN ENERGY, INC.DESERADO MINE3607 COUNTY ROAD 65RANGELY, CO 81648MAP 166REFUSE PILE SOIL STOCKPILE INVENTORY1"=400'1NARRATIVE͗
DURING THE STOCKPILING OF SOIL FOR THE RP-1-5 AREAS, THE DEPTH REQUIREMENT FOR RECLAMATION COVERAGE
WAS 48". THIS WORK WAS DONE PRIOR TO 2003 AS OUR AERIAL ORTHOPHOTO AND CONTOURS FROM THAT YEAR
SHOW THE SOIL STOCKPILES IN PLACE, RP-1 WAS RECLAIMED, AND RP-2-5 WERE ACTIVELY RECEIVING REFUSE.
AT SOME POINT, IT WAS DETERMINED THE TOPSOIL IS NOT SIGNIFICANTLY BETTER THAN THE SUBSOIL AND IS
INFESTED WITH INVASIVE CHEATGRASS. DURING RECLAMATION, THE TOPSOIL WAS DESIGNATED TO BE PLACED FIRST
WITH THE SUBSOIL PLACED ON TOP. THE TOTAL DEPTH REQUIREMENT WAS ALSO REDUCED TO 30". THIS REDUCTION
IN RECLAMATION DEPTH MEANT THERE WAS EXCESS MATERIAL IN THE SOIL STOCKPILES.
THE DEVELOPMENT OF THE RP-A AREA COINCIDED WITH AN UNEXPECTED CHANGE IN COAL PROCESSING WASTE
MOISTURE CONTENT. COAL WASTE SLURRY FROM THE BOTTOM OF THE CLARIFIER USED TO BE DISCHARGED INTO
THE OLD SEALED D SEAM MINE. THAT DISPOSAL AVENUE UNEXPECTEDLY ENDED AND THE HIGH MOISTURE MATERIAL
HAD TO BE ROUTED TO THE REFUSE PILES. THE HIGH MOISTURE MATERIAL HAS TO BE SPREAD OUT AND DRIED
BEFORE IT CAN BE PROPERLY COMPACTED.
DURING THE WINTER, THE HIGH MOISTURE MATERIAL PRESENTS A UNIQUE PROBLEM. PROPER COMPACTION
CANNOT HAPPEN DURING FREEZING TEMPERATURES. FURTHERMORE, THE WET MATERIAL DOES NOT DRY OUT UNTIL
LATE SPRING. THE WET MATERIAL CANNOT BE STOCKPILED BECAUSE IT SPREADS OUT. RATHER THAN ONE LARGE
STOCKPILE, THE WET MATERIAL IS BEST HANDLED BY PLACING IT IN SPACED OUT ROWS UNTIL SPRING WHEN THE
ROWS CAN BE PUSHED, DRIED OUT, AND COMPACTED. THIS REQUIRES A SIGNIFICANT AMOUNT OF SURFACE AREA.
FORTUNATELY, RP-A HAD BEEN APPROVED JUST BEFORE THIS NEW AREA-INTENSIVE WASTE HANDLING PROCESS
BECAME NECESSARY. KNOWING THERE WAS EXTRA STOCKPILED SOIL AVAILABLE, THE AMOUNT OF TOPSOIL AND
SUBSOIL REMOVED FROM RP-A WAS REDUCED IN ORDER TO SPEED DEVELOPMENT AND MAKE MUCH NEEDED
STOCKPILING AND DRYING AREA AVAILABLE AS QUICKLY AS POSSIBLE. ALSO, THE ACTUAL AMOUNT OF TOPSOIL
EXCAVATED WAS DEEMED LESS IMPORTANT AS IT IS PLACED BELOW THE SUBSOIL UPON RECLAMATION.
THE PURPOSE OF THIS MAP IS TO DOCUMENT THE STOCKPILED SOIL VOLUMES AND REQUIREMENTS. OLD STOCKPILE
VOLUMES WERE TABULATED BEFORE 2003, BUT CLOSER INSPECTION REVEALED INCONSISTENCIES AND NO EVIDENCE
OF HOW THOSE VOLUMES HAD BEEN CALCULATED COULD BE LOCATED. RATHER THAN RELYING ON SUSPECT
VOLUME TABULATIONS, THE ORIGINAL EXISTING GROUND CONTOURS FROM A 1979 AERIAL SURVEY WERE DIGITIZED
AND ADJUSTED FOR DATUM DISCREPANCIES. ACCURATE VOLUMES FOR THE STOCKPILES FROM RP1-5 WERE THEN
CALCULATED.
COMBINING RP 2-3,4, AND 5 WILL REQUIRE ADDITIONAL STOCKPILING TO COVER AN ADDITIONAL 5.83 ACRES.
ADDITIONALLY, THE EXCESS FROM THE OLD STOCKPILES ALONG WITH THE COMPLETED STOCKPILE VOLUMES FROM
THE RP-A AREA ARE 2.5 ACRE FEET SHORT. THE TOTAL ADDITIONAL VOLUME TO BE STOCKPILED IS 17.07 ACRE-FEET.
THIS VOLUME WILL PRIMARILY COME FROM THE AREA BETWEEN RP-234 AND RP-5. BECAUSE THIS AREA HAS SOME
ROCKY KNOLLS, IT MAY BE MORE COST EFFECTIVE TO PUSH SOME OF THE REFUSE OFF THE UPPER AREAS OF RP-A
AND TAKE MORE SUBSOIL FROM THERE. SOIL TAKEN FROM FROM RP-A WILL BE STOCKPILED IN PILES 10 AND 11
SHOWN HEREON WITHOUT A NEED TO INCREASE DISTURBED AREA. SOIL TAKEN FROM BETWEEN RP-234 AND 5 WILL
BE PLACED ON PILES 6 AND 7 SHOWN HEREON ALSO WITHOUT INCREASING THE DISTURBED AREA FOR THE
STOCKPILES.
MAP 166
N
S
EW