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ENERAL NOTES:
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<br />RELOCATED
<br />I �' I I � I I � I \ � � % BOXELDER
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<br />� PERMIT \ �
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<br />APPROXIMATE CLAY RA
<br />LINER LOCATION ERVIOR' BACKFILL, GRADE, AND STABILIZE -
<br />BELOW -GRADE RES �` l
<br />I II .I1111 �4\� DEVELOPED WATER RESOURCES o�
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<br />q83 ��►e``.�\\i'\ � \ LINER
<br />+ EFFECTIVE \ d."� _ _ .� _
<br />�1 100 YEAR
<br />``'��`°\tj�e__-`.-_..f��__ -__- �2=- -_'- _ -- � •yr -. -s•- .=- =ram �- �- �r,�- �r �- �r - ��~~_ ►
<br />FLOODPLAIN ".._ - ~ - � ._. ••_ - � _
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<br />A
<br />ET!-*
<br />111 ti , RECHARGE POND • - ` ~S , �% ,rEF-FP 2 _ EF-FP" "" _` -ET.-F - -' - EF-FP
<br />TOP OF LEVEE 4834' \ ! � �•�
<br />18" CULVERT RECHARGE POND m
<br />&GATE
<br />7-- OWN
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<br />v.,.
<br />" COUNTY ROAD 36.X
<br />-�3 r-, d�_�� PERMIT `` ! EXISTING 36" CMP
<br />- { �` �I d3-�3 BOUNDARY j
<br />RECHARGE POND OUTLET --
<br />---fig. _ TO EXISTING CULVERT Pt
<br />IEF Fw `EF"FP -'' ..- I .� r'�- -�`� o, j \�'? - `,,�
<br />F� RECHARGE POND OUTLET �r-FW L
<br />EFFECTIVE 'cdy TO EXISTING DRAIN F 1 III 1
<br />EF-F
<br />I 100 YEAR - FF�E.:' l� W
<br />FLOODWAYo5 ,11 ,%`,fl
<br />'rll
<br />0 150
<br />300
<br />(IN FEET)
<br />1 INCH = 150 FEET
<br />LEGEND:
<br />PROPOSED MAJOR CONTOUR --
<br />--- 4820------
<br />PROPOSED MINOR CONTOUR
<br />EXISTING CONTOUR -
<br />- - -5013- - -- -"
<br />EXISTING RIGHT OF WAY
<br />PERMIT BOUNDARY
<br />SURFACE WATER
<br />----
<br />EFFECTIVE 100 YEAR FLOODWAY
<br />EF-FW
<br />EFFECTIVE 100 YEAR FLOODPLAIN
<br />EF-FP
<br />FRENCH DRAIN
<br />UD_
<br />PAVED ROAD AREA
<br />ERVIOR LINER NOTE
<br />1. PRIOR TO CONSTRUCTION, OVERBURDEN AND CLAYSTONE MATERIAL TESTING
<br />SHALL BE PERFORMED FOR USE IN FINAL DESIGN. THE FOLLOWING SPECIFICATIONS
<br />AND PROCEDURES ARE PROVIDED AS A GENERAL GUIDELINE FOR PERMITTING
<br />PURPOSES. FINAL SPECIFICATIONS AND DESIGN CRITERIA WILL BE DEVELOPED
<br />DURING THE FINAL DESIGN PROCESS.
<br />2. EACH LAYER OF FILL SHALL BE SCARIFIED TO ALLOW PROPER BONDING BETWEEN
<br />LAYERS.
<br />3. DENSITY AND MOISTURE CONTENT TESTING SHALL BE PERFORMED AT A RATE OF 1
<br />(ONE) TEST FOR EACH 2,000 YARDS PLACED.
<br />4. ALL CLAY LINER MATERIAL SHALL BE COMPACTED TO A MINIMUM 95% ASTM-D698-78
<br />STANDARD PROCTOR AT +2% OF OPTIMUM MOISTURE CONTENT.
<br />5. NO LINER MATERIAL SHALL BE PLACED IN THE LINER SLOPE WHILE EITHER THE
<br />MATERIAL, EMBANKMENT, OR FOUNDATION IS FROZEN AND NO ORGANIC MATERIAL
<br />SHALL BE PLACED IN THE LINER SLOPE.
<br />6. EACH LAYER OR LIFT SHALL BE CONSTRUCTED CONTINUOUSLY AND
<br />APPROXIMATELY HORIZONTAL FOR THE WIDTH AND LENGTH OF EACH LIFT.
<br />7. LINER MATERIAL SHALL BE COMPOSED OF CLAYEY OVERBURDEN AND WEATHERED
<br />CLAYSTONE THAT BREAKS DOWN DURING PROCESSING, BEDROCK MATERIAL SHALL
<br />BE RIPPED, MOISTURE TREATED, AND ALLOWED TO AIR SLAKE FOR A MINIMUM OF
<br />ONE DAY PRIOR TO ITS PLACEMENT IN THE LINER. ALL BEDROCK MATERIAL SHALL
<br />HAVE A MINIMUM OF 75% PASS THE US STANDARD 200 SIEVE PRIOR TO PLACEMENT
<br />IN THE EMBANKMENT.
<br />8. THE CLAY LINER MATERIAL SHALL BE MIXED IN THE EMBANKMENT AT THE RATIO OF
<br />4 (FOUR) PARTS CLAY OVERBURDEN TO 1 (ONE) PART SHALE BEDROCK MATERIAL.
<br />9. LINER MATERIAL SHALL BE PLACED IN A 9-INCH (MAXIMUM) LOOSE LIFT PRIOR TO
<br />COMPACTION.
<br />10. A CATERPILLAR 815 OR 825 SHEEPSFOOT COMPACTOR (OR EQUIVALENT) SHALL BE
<br />USED FOR COMPACTING EFFORTS.
<br />i l . THE COMPLETED LINER SHALL BE PROTECTED FROM DAMAGE CAUSED BY
<br />DESICCATION OR FREEZING TEMPERATURES BY PLACING RANDOM FILL OR A
<br />MINIMUM OF 12-INCHES PIT RUN MATERIAL ON THE ENTIRE SLOPE. ALL RANDOM FILL
<br />TO BE PLACED WITH A MAXIMUM 9-INCH LOOSE LIFT AND COMPACTED TO A
<br />MINIMUM OF 95% ASTM-D698-78 STANDARD PROCTOR.
<br />1.2. ALL WEATHERED BEDROCK TO BE EXCAVATED AND REMOVED FROM THE CLAY
<br />LINER FOUNDATION. WEATHERED BEDROCK SHALL BE REMOVED UNTIL COMPETENT
<br />BEDROCK (AS DETERMINED BY THE ONSITE ENGINEER) IS EXPOSED. THE BEDROCK
<br />SHALL THEN BE SCARIFIED PRIOR TO THE PLACEMENT OF FILL MATERIAL.
<br />FLOODWAY DIVERSION BERM NOTE
<br />1. BERM LOCATION AND ALIGNMENT MAY BE SHIFTED NORTH AS NEEDED WITHOUT
<br />FLOODWAY IMPACT.
<br />2. BERM ELEVATION MAY BE HIGHER THAN INDICATED IF EXTRA OVERBURDEN
<br />MATERIALS ARE AVAILABLE.
<br />3. BERM WIDTH MAY BE WIDER THAN INDICATED WITHOUT FLOODWAY IMPACT IF
<br />ELEVATION IS NOT ABOVE EXISTING GROUND ELEVATION TO THE SOUTH.
<br />EXISTING
<br />GRADE
<br />RECHARGE POND
<br />3
<br />5.0' (MIN.)
<br />10. o
<br />FLOODWAY DIVERSION BE
<br />W
<br />1. THIS TIMNATH CONNELL PIT AMENDMENT PROPOSES TO CHANGE THE RECLAMATION
<br />PLAN TO INCLUDE OPPORTUNITIES FOR FUTURE DEVELOPMENT CONSISTENT WITH
<br />THE ESTABLISHED TIMNATH ZONING DISTRICT AND THE PROPERTY OWNER
<br />PREFERENCES. THE AMENDMENT APPLICATION FORM INCLUDES A COMBINATION OF
<br />DEVELOPED WATER RESOURCES, INDUSTRIAL/COMMERCIAL, AND RESIDENTIAL
<br />POST -MINING LAND USES. FINAL RECLAMATION PROPOSES CREATION OF STABLE
<br />LANDFORMS TO SUPPORT THE ZONING DISTRICT ALLOWABLE LAND USES. THIS
<br />COMBINATION OF MINED LAND RECLAMATION BOARD (MLRB) FINAL LAND USES
<br />WILL ALLOW FUTURE DEVELOPMENT OF THE PROPERTY CONSISTENT WITH THE
<br />CURRENT TOWN OF TIMNATH ZONING DISTRICT, REGIONAL COMMERCIAL (RC). THE
<br />REGIONAL COMMERCIAL ZONING DISTRICT INCLUDES REGIONAL COMMERCIAL USES
<br />SUCH AS LARGE RETAIL ESTABLISHMENTS, BUSINESS AND LIGHT INDUSTRIAL USES,
<br />MEDICAL FACILITIES AND OFFICES, HIGHER DENSITY MULTI -FAMILY RESIDENTIAL,
<br />AND A CONTINUUM OF LIFE -CARE HOUSING OPTIONS.
<br />2. PHASE I MINING IS COMPLETE, THE PHASE 1 MINING AREA IS TO BE RECLAIMED WITH
<br />A COMBINATION OF BELOW -GRADE LINED RESERVOIR, RECHARGE PONDS, AND
<br />COMPACTED BACKFILL. THE RESERVOIR LINER CONSTRUCTION HAS BEEN
<br />COMPLETED ON THE WEST AND SOUTH SIDES OF THE MINING AREA.
<br />3. PHASE 2 MINING IS COMPLETE. THE PHASE 2 MINING AREA HAS BEEN BACKFILLED,
<br />COMPACTED, GRADED, AND SEEDED FOR REVEGETATION. SEEDING WAS
<br />ACCOMPLISHED WITH THE PREVIOUSLY APPROVED RECLAMATION SEED MIX. THE
<br />WEITZEL ROAD EXTENSION HAS BEEN CONSTRUCTED AND THE ROAD AND
<br />RIGHT-OF-WAY HAVE BEEN RELEASED FROM THE PERMIT AREA. THE RELOCATED
<br />BOX ELDER DITCH HAS ALSO BEEN CONSTRUCTED IN THE PHASE 2 MINING AREA.
<br />4. RECLAMATION WILL GENERALLY INCLUDE BACKFILLING, COMPACTING, GRADING,
<br />AND STABILIZATION OF AREAS PLANNED FOR FURTHER DEVELOPMENT FOLLOWING
<br />RELEASE FROM THE MLRB RECLAMATION PERMIT. MANY OF THE MINING AREAS
<br />HAVE BEEN, OR WILL BE, BACKFILLED TO ACCOMMODATE FUTURE
<br />INDUSTRIAL/COMMERCIAL OR RESIDENTIAL DEVELOPMENT BY PLACING
<br />STRUCTURAL OR OTHER APPROPRIATE FILL MATERIAL, COMPACTING FOR FUTURE
<br />STABILITY, AND GRADING FOR DEVELOPMENT NEEDS SUCH AS STORMWATER SEWER
<br />DESIGN AND CONSTRUCTION.
<br />5. AREAS OF PHASE 1 AND PHASE 2 THAT HAVE ALREADY BEEN BACKFILLED,
<br />COMPACTED, TOPSOILED, GRADED, AND SEEDED HAVE BEEN PLANTED WITH THE
<br />PREVIOUSLY APPROVED GRASS SEED MIX BELOW.
<br />Timnath Connell Pit Approved
<br />Revegetation Seed Mix
<br />Rate
<br />Grass Species (lbs PLS/acre)
<br />eatgrass,
<br />Thinspike
<br />5.5
<br />Grama, Sideoats
<br />2.5
<br />Switchgrass
<br />1.5
<br />TOTAL
<br />9.5
<br />Rates are for drill seeding. If broadcast
<br />seeding is used, double seeding rates.
<br />6. ALL AVAILABLE TOPSOIL AND OVERBURDEN MATERIAL WILL BE USED FOR
<br />RECLAMATION.
<br />7. SOME AREAS DISTURBED BY MINING ACTIVITIES WILL BE PREPARED WITH TOPSOIL
<br />AND REVEGETATED DURING RECLAMATION. ALTERNATIVELY, AREAS PLANNED FOR
<br />MORE IMMEDIATE MLRB PERMIT RELEASE AND DEVELOPMENT MAY BE BACKFILLED,
<br />COMPACTED, AND COVERED WITH SUITABLE SOIL STABILIZING MATERIAL SUCH AS
<br />HYDRO -MULCH, SOIL TACKIFIER, OR A LAYER OF ROCK TO MEET PERMIT RELEASE
<br />REQUIREMENTS.
<br />8. IF REVEGETATION OCCURS, IT WILL GENERATE A BLEND OF FAST GROWING,
<br />STABILIZING, GRASS SPECIES AND, GIVEN SUITABLE PRECIPITATION, SHOULD
<br />PRODUCE GOOD VEGETATION COVER OVER MUCH OF THE REVEGETATED AREA.
<br />ALTHOUGH MINE PITS WILL BE BACKFILLED, COMPACTED, AND GRADED TO BLEND
<br />INTO THE ADJACENT TOPOGRAPHY AND PROVIDE FUTURE DEVELOPMENT NEEDS, NO
<br />SLOPES WILL BE RECLAIMED ANY STEEPER THAN 3H:1 V.
<br />8. THE NEW PROPOSED FAST GROWING, STABILIZING SEED MIXTURE FOR FUTURE
<br />REVEGETATION IS PROVIDED BELOW.
<br />SEC
<br />Timnath Connell Pit Amendment
<br />Proposed Revegetation Seed Mix
<br />Rate
<br />Grass Species (lbs PLS/acre)
<br />Intermediate
<br />Wheatgrass
<br />5
<br />Blue Grama
<br />1
<br />Triticale
<br />1 1.25
<br />TOTAL
<br />7.25
<br />Rates are for broadcast seeding.
<br />9. PERIODIC INSPECTION FOR NOXIOUS WEEDS, AT LEAST ONCE A YEAR EARLY IN THE
<br />SEASON, WILL BE DONE AS PART OF A WEED MANAGEMENT PLAN.
<br />10. BEST MANAGEMENT PRACTICES WILL BE USED TO CONTROL EROSION AND
<br />STORMWATER SUSPENDED SEDIMENT RUNOFF FROM THE SITE DURING
<br />RECLAMATION ACTIVITIES.
<br />15'
<br />RANDOM FILL
<br />\-C6MPACTED \ \ - �. 0.5/1
<br />LINER
<br />5.0 (MIN.)
<br />10.0'
<br />RESERVOIR LINER
<br />MINE PIT REcOVED
<br />FUTURE BELOW -GRAD RESERVOIR
<br />MAY 0 5 2025
<br />Colorado Division of Redamdon,
<br />Mining and SafetY
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<br />PERMIT
<br />BOUNDARY Date: APRIL 2025
<br />Job No: 590-004
<br />Drawn: M. MOKVYTS
<br />FRENCH Desi n: M. MOKVYTS
<br />DRAIN 6.0 - 8.0Checked: B. SCHENDERLEIN
<br />o Scale: 1" = 157
<br />UNDISTURBED Sheet'
<br />SAND & GRAVEL
<br />GROUNDWATER COLLECTION TRENCH NOT TO SCALE
<br />Of:
<br />
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