2018-10-19_PERMIT FILE - M2016054 ‎(3)‎

• Permit No: M2016054
• IBM Index Class Name: Permit File
• Doc Date: 10/19/2018
• Doc Name Note: Map F-2
• Doc Name: Adequacy Review Response
• From: Blue Earth Solutions
• To: DRMS
• Email Name: AME
• Email Name: MAC
• Media Type: M
• Archive: No

0'-5' SOIL/OVERBURDEN
15'-20'
SAND/GRAVEL
HISTORIC GROUND
OVERBURDEN BACKFILL
/..►%:. 3' - MINING SLOPE
016 -VU
V 12" TOPSOIL
POND RECLAMATION
N.T.S.
4:1 SLOPE TO MEET
4:1 OR SHALLOWER SLOPE
GRADE AT TOP OF
WIDTH & GRADIENT VARIIES
BANK. UPLAND SEED
m
MINING HEADWALL
FEET )
Western Wheatgrass
APPLY WETLAND
= 300 ft.
AND UPLAND
LEGEND:
12" TOPSOIL SEED
__
Sand dropseed -
AVERAGE NORMAL
Switchgrass
1
PROPOSED HAUL ROAD
WATER SURFACE
[TOTAL _------------- - -- --
_ --_------�- -- 9
*Application rate is for drill seeding. If seed is to be broadcast, the application
rate will be doubled.
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EXISTING PARCELS
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SHORELINE
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EXISTING DITCH
WETLAND BENCH low
SHORELINE/WETLAND RECLAMATION
SLOPE TO
MEET GRADE
N.T.S.
POND LINER NOTES:
1. PRIOR TO CONSTRUCTION, OVERBURDEN AND CLAYSTONE MATERIAL TESTING SHALL BE PERFORMED FOR UISE IN FINAL DESIGN. THE FOLLOWING
SPECIFICATIONS AND PROCEDURES ARE PROVIDED ASA GENERAL GUIDELINE FOR PERMITTING PURPOSES. FINAL SPECIFICATIONS AND DESIGN
CRITERIA WILL BE DEVELOPED DURING THE FINAL DESIGN PROCESS.
2. EACH LAYER OF FILL SHALL BE SCARIFIED TO ALLOW PROPER BONDING BETWEEN LAYERS.
3. DENSITY AND MOISTURE CONTENT TESTING SHALL BE PERFORMED AT A RATE OF 1 TEST FOR EACH 2,000 YARDS PLACED.
4. ALL CLAY LINER MATERIAL SHALL BE COMPACTED TO A MINIMUM 95% ASTM -13698-78 STANDARD PROCTOR AT ±2% OF OPTIMUM MOISTURE CONTENT.
5. NO LINER MATERIAL SHALL BE PLACED IN THE LINER SLOPE WHILE EITHER THE MATERIAL, EMBANKMENT, OR FOUNDATION IS FROZEN.
6. NO ORGANIC MATERIAL SHALL BE PLACED IN THE LINER SLOPE.
7. EACH LAYER OR LIFT SHALL BE CONSTRUCTED CONTINUOUSLY AND APPROXIMATELY HORIZONTAL FOR THE WIDTH AND LENGTH OF EACH pFT.
8. LINER MATERIAL SHALL BE COMPOSED OF CLAYEY OVERBURDEN AND WEATHERED CLAYSTONE THAT BREAKS DOWN DURING PROCESSING.
BEDROCK CLAYSTONE MATERIAL MAY BE RIPPED, MOISTURE TREATED, AND ALLOWED TO AIR SLAKE FOR A MINIMUM OF ONE DAY PRIOR TQ ITS
PLACEMENT IN THE LINER. LINER MATERIAL IS DEFINED AS MATERIAL HAVING 4 INCH OR SMALLER COBBLE, A, MINIMUM OF 50% FINES BY CLAY
WEIGHT PASSING THE US STANDARD 200 SIEVE, AND A PLASTICITY INDEX OF 10% OR GREATER FOR THE PORTION OF MATERIAL FINER THA THE US
STANDARD 40 SIEVE.
9. SUFFICIENT MOISTURE SHALL BE ADDED AT THE BORROW AREA SO NO MORE THAN 3% ADDITIONAL MOISTURE IS REQUIRED TO BRING ANY LINER
MATERIAL TO SPECIFICATIONS ONCE PLACED IN THE FILL.
10. LINER MATERIAL SHALL BE PLACED IN MAXIMUM OF 9 -INCH LOOSE LIFTS PRIOR TO COMPACTION.
11. A CATERPILLAR 815 OR 825 SHEEPSFOOT COMPACTOR (OR EQUIVALENT) WILL BE USED FOR COMPACTING EFFORTS.
12. THE COMPLETED LINER SHALL BE PROTECTED FROM DAMAGE CAUSED BY DESICCATION OR FREEZING TEMPERATURES BY PLACING A MINIMUM OF
12 -INCHES PIT RUN MATERIAL ON THE ENTIRE SLOPE.
(9 1 NORTH 0
0
0
300 0
300 600 900
y
- -- - ----0.75 -- ---
T TAL 4.5
_ _ _ _ _ _
*Application rate is for drill seeding. If seed is to be broadcast, the application
rate will be doubled.
m
( IN
FEET )
Western Wheatgrass
1 inch
= 300 ft.
1
LEGEND:
1.5
__
Sand dropseed -
PERMIT BOUNDARY
Switchgrass
1
PROPOSED HAUL ROAD
- - - - - - -
[TOTAL _------------- - -- --
_ --_------�- -- 9
*Application rate is for drill seeding. If seed is to be broadcast, the application
rate will be doubled.
PROPOSED MINING LIMITS
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EXISTING GAS LINE
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EXISTING OVERHEAD ELECTRIC
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EXISTING EASEMENT
- - - - - - -
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EXISTING 5 FOOT CONTOUR
--------4880--
----4880--
EXISTING,
EXISTING 25 FOOT CONTOUR
----4700--
---4700--
PROPOSED
PROPOSED 5 FOOT CONTOUR
4880
PROPOSED 25 FOOT CONTOUR
---4700--
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NOTES:
1. THE PROPOSED FINAL LAND USE FOR THE IRWIN/THOMAS MINE IS GENERAL AGRICULTURE.
2. RECLAMATION PLAN MAP ILLUSTRATES CONDITIONS WHEN ADEQUATE QUANTITIES OF
OFF-SITE BACKFILL MATERIAL IS NOT AVAILABLE BUT A PERMANENT SOURCE OF WATER
FOR LONG-TERM AUGMENTATION OF EXPOSED GROUNDWATER HAS BEEN OBTAINED.
MINE CELLS WILL BE BACKFILLED TO CREATE OPEN WATER PONDS AND LIMITED WETLAND
AREAS.
3. IF ADEQUATE QUANTITIES OF OFF-SITE BACKFILL ARE NOT AVAILABLE, MINING WILL NOT
PROGRESS INTO MA3 OR MA4..AND EXISTING CONDITIONS WILL REMAIN UNDISTURBED.
4. ALL SLOPES SHALL BE GRADED TO 3H:1 V OR FLATTER. SLOPES WITHIN THE ST. VRAIN
CREEK DELINEATED 100 -YEAR FLOODPLAIN SHALL BE GRADED TO 4H:1V OR FLATTER.
ROUGH GRADING WILL ESTABLISH FINAL ELEVATIONS, SLOPES, AND TRANSITIONS.
TRANSITIONS BETWEEN UPLANDS, WETLANDS, AND POND SLOPES SHALL BE GRADED WITH
A SMOOTH, GRADUAL TOPOGRAPHY.
5. FINAL GRADING WILL INCLUDE ADDITION OF TOPSOIL AND SURFACE PREPARATION FOR
REVEGETATION. SPECIAL ATTENTION SHALL BE GIVEN TO TRANSITIONS FROM RECLAIMED
AREAS TO UNDISTURBED LAND.
6. ALL AVAILABLE TOPSOIL AND OVERBURDEN MATERIAL WILL BE USED FOR BACKFILLING
AND RECLAMATION.
7. THE GROWTH MEDIUM FOR REVEGETATION WILL BE A COMBINATION OF OVERBURDEN AND
TOPSOILS.
8. TWO DIFFERENT MIXES OF UPLAND GRASSES WILL BE USED IN AREAS THAT WILL NOT
EXPERIENCE PERIODIC FLOODING, SEASONAL GROUNDWATER, OR OTHER MOIST SOIL
CONDITIONS. ONE SEED MIX WILL BE USED SIMPLY FOR QUICK SOIL STABILIZATION AND
EROSION CONTROL. THIS MIX WILL MAINLY BE USED IN MA1 WHERE FURTHER
AGRICULTURAL OR OTHER DEVELOPMENT IS EXPECTED TO OCCUR FOLLOWING PERMIT
RELEASE. THE SECOND GRASS SEED MIX FOR AREAS LEFT AS OPEN SPACE IN MA2 IS
COMPOSED OF A LONG LASTING AND REGENERATING NATIVE UPLAND SEED MIXTURE.
Upland Grass Seed - Soil Stabilization
Application Rate*
(#PLS/acre)
rmediate Wheatgrass 3
Grama 0.75lfa
F
- -- - ----0.75 -- ---
T TAL 4.5
_ _ _ _ _ _
*Application rate is for drill seeding. If seed is to be broadcast, the application
rate will be doubled.
- - - - - - - -
Upland Grass Seed - Native Open Space
Application Rate*
(#PLS/acre)
Western Wheatgrass
4
Blue grama
1
Side -oats grama - --
1.5
__
Sand dropseed -
__
0.5
Switchgrass
1
Indian Ricegrass
1
[TOTAL _------------- - -- --
_ --_------�- -- 9
*Application rate is for drill seeding. If seed is to be broadcast, the application
rate will be doubled.
9. IN AREAS WHERE WETLANDS COULD POTENTIALLY BE DEVELOPED, THE SEED MIX WILL BE
MODIFIED TO INCLUDE MORE TRANSITION AND WETLAND GRASSES AND GRASS -LIKE
SPECIES. THESE SEED MIXES, ESPECIALLY IF STANDING WATER OR SATURATED SOILS
EXIST DURING PLANTING, WILL LIKELY NEED TO BE BROADCAST.
Wetland/Transition Grass Seed
_ - - -_
October, 2018
Application Rate*
(#PLS/acre}
_
Western Wheatgrass
2.5
Switchgrass-
2.5 -
Bottlebrush squirreltail
1.5
Alkali sacaton
_
1.5
Colorado rush _
1.5_
Meadow sedge- - - - -----
TOTAL --
*Application rate is for drill seeding.
rate will be doubled.
_
---- -- - 1.5
-- 1 �----------
If seed is to be broadcast, the application
-
10. UPLAND GRASS SEED WILL BE PLANTED WITH A DRILL EQUIPPED WITH DEPTH BANDS AND
PRESS WHEELS. THE SEEDED AREA WILL THEN BE COVERED WITH CERTIFIED WEED -LESS
STRAW MULCH AT A RATE OF 2,000 POUNDS PER ACRE. THE STRAW WILL BE CRIMPED INTO
THE SOIL TO CONTROL EROSION UNTIL THE GRASS BECOMES ESTABLISHED.
11. DRILL SEEDING IS THE PREFERRED METHOD FOR REVEGETATION. IF BROADCAST
SEEDING IS NECESSARY ON MOIST SOILS, STEEP SLOPES, OR IN EXCESSIVELY ROCKY
AREAS, SUCCESS CAN BE ENCOURAGED BY BROADCASTING ONTO GROWTH MEDIUM THAT
IS VERY LOOSE. IF THE SEED IS BROADCAST IN THOSE CIRCUMSTANCES, THEN THE
SEEDED AREA WILL BE DRAGGED TO HELP BURY THE SEED,
12. PERIODIC INSPECTION FOR NOXIOUS WEEDS, AT LEAST ONCE A YEAR EARLY IN THE
SEASON, WILL BE DONE AS PART OF A WEED MANAGEMENT PLAN.
13. THE MINE OFFICE/SCALE HOUSE TRAILER AND ANY OTHER STRUCTURES ASSOCIATED
WITH MINING WILL BE REMOVED FROM THE SITE DURING FINAL RECLAMATION ACTIVITIES.
14. BEST MANAGEMENT PRACTICES WILL BE USED TO CONTROL EROSION AND STORMWATER
SLASPENDED SEDIMENT RUNOFF FROM THE SITE DURING RECLAMATION ACTIVITIES.
�Q CALL UTILITY NOTIFICATION CENTER OF
7 COLORADO
/O,
N�C •
Know what's below.
Cal before you dig.
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE
YOU DIG, GRADE, OR EXCAVATE FOR THE
MARKING OF UNDERGROUND MEMBER UTILITIES.
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October, 2018
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590-008
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October, 2018
�-
590-008
Drawn:
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SCHENDERLEIN
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SCHENDERLEIN
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Date:
October, 2018
Job No:
590-008
Drawn:
C. Snowdon
Design: B.
SCHENDERLEIN
Checked: B.
SCHENDERLEIN
Scale:
1 " = 200'
Sheet:
2
Of: