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<br />� � l III - :III o 150 300
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<br />it \Itv'{II I t 1 INCH = 150 FEET
<br />If LEGEND:
<br />PROPOSED MAJOR CONTOUR
<br />-- r.,.
<br />PROPOSED MINOR
<br />�� ( � � � \ O CONTOUR
<br />3
<br />EXISTING CONTOUR - - - -5013- - - -
<br />I- uD uD LID uD EXISTING RIGHT OF WAY - - -
<br />I �, ��� Y_ �� CACHE LA
<br />� PERMIT BOUNDARY �..� � � �.■s
<br />POUDRE RIVER SURFACE WATER
<br />`\ ` L �, 1 \ \� ` �..� EFFECTIVE 100 YEAR FLOODWAY - EF-FW
<br />I \ \� EFFECTIVE 100 YEAR FLOODPLAIN
<br />I 1 { `{ RA2 ,
<br />FRENCH DRAIN _, __ t _. uD
<br />4835 INDUSTRIAL/COMMERCIAL
<br />! 1 I l rr \ t
<br />PAVED ROAD AREA
<br />r uD BACKFILL, GRADE, AND STABILIZE �\ I� l , ��\�\ \\� RESERVIOR LINER NOTES
<br />110111111 1I I r \ �., IOR TO CONSTRUCTION, OVERBURDEN AND CLAYSTONE MATERIAL TESTING
<br />I \ \�\\ SHALL BE PERFORMED FOR USE IN FINAL DESIGN. THE FOLLOWING SPECIFICATIONS
<br />I `� { I I RELOCATED , ( ''\~�� AND PROCEDURES ARE PROVIDED AS A GENERAL GUIDELINE FOR PERMITTING
<br />11 Ali{{{fi ! I � I PERMIT � � I � ,�. i r
<br />BOUNDARY \ BOXELDER �� PURPOSES. FINAL SPECIFICATIONS AND DESIGN CRITERIA WILL BE DEVELOPED
<br />II 1{{` I I 34 DITCH ` l
<br />I III I{ill// !II _ [PERMIT AREA 121.4 ACRES I '�
<br />I �II 1
<br />1fiI { Il{III 'Iltt FRENCH DRAIN I
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<br />APPROXIMATE CLAY
<br />1 III atllll tl1 Q LINER LOCATION ,
<br />`� III 11 { 1111 r ` { { i I I t SCREENING BERM '
<br />I lll_IIII{II�.IIlI 11 '.► "" "' "�..,► � �
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<br />I 11lI. II{IIII IIII �� fi ♦ � ' UTILITY
<br />{ IIII 11,1111 111 r# �. , -9 EASEMENT z I
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<br />fill lIt J 1 III I ♦ EASEMENT
<br />III Il I1 fi III ! 3H:1V RECLAIMED SLOPE/ '� -�zj
<br />I { { I IIII fi I RESERVOIR LINER ♦ - _ -
<br />Illlll{I{� IIII $:, ♦ "`-- -- ------
<br />I� I I fi 1lfilll I lI � I l i l 1 ♦ .�
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<br />APPROXIMATE CLAY RA1
<br />N� LINER LOCATION
<br />II I11111 ,�� BELOW -GRADE RESERVIOR
<br />I I : It I ♦ BACKFILL, GRADE, AND STABILIZE
<br />� IINow now
<br />IIII DEVELOPED WATER RESOURCES '� ♦! {
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<br />r/' \ \ ��\ ��„ 48 ' ►\\\\\t \\ 3HAV RESERVOIR
<br />LINER
<br />t ( ��, EFFECTIVE \ \ _ _
<br />100 YEAR ` •.` `'� \ ``� j '`•`„
<br />FLOODPLAIN
<br />"71P
<br />RECHARGE POND
<br />EF-FPREF-FP'
<br />t tt { `� ,�t TOP OF LEVEE 4834'
<br />I
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<br />1111 & GATE RECHARGE POND I1 '
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<br />X 'Fh
<br />��� ROAD 3Ei _
<br />dJ-J3 PERMIT
<br />RECHARGE POND OUTLET ' I d3-33 BOUNDARY EXISTING 36" CMP
<br />TO EXISTING CULVERTFw
<br />I !
<br />F� RECHARGE POND OUTLET
<br />EFFECTIVE GL TO EXISTING DRAIN ''" , FF,F - EF FP \ II Ir �l �,-: .` .
<br />100 YEAR cr-FW EF_ \ r I 111 IL
<br />411
<br />I
<br />�
<br />EFFECTIVE
<br />100 YEAR
<br />FLOODWAY
<br />EFFECTIVE
<br />100 YEAR
<br />O FLOODPLAIN
<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 I (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 />11. 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 />12. 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 NOTES:
<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 />GRADE
<br />RECHARGE POND
<br />FL
<br />}-�-12' --�
<br />3 _
<br />5. 0' (MIN.
<br />/
<br />i�
<br />i
<br />10.0
<br />GENERAL NOTES:
<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 I 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 />Grass Species
<br />Rate
<br />(Ibs 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:IV.
<br />8. THE NEW PROPOSED FAST GROWING, STABILIZING SEED MIXTURE FOR FUTURE
<br />REVEGETATION IS PROVIDED BELOW.
<br />Timnath Connell Pit Amendment
<br />Proposed Revegetation Seed Mix
<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 />/ __6 A CTED
<br />��,-CLAY LINER ��. 0.5/1
<br />FE/�/i � � (MAN.) / \ , �
<br />T_
<br />10.0'
<br />RESERVOIR LINER
<br />3
<br />MINE PIT
<br />FUTURE BELOW -GRAD RESERVOIR
<br />/ //77
<br />/
<br />Y DIVERSION BERM CROSS SCTION
<br />FRENCH
<br />DRAIN
<br />0
<br />UNDISTURBED
<br />SAND & GRAVEL
<br />OUNDWATER COLLECT
<br />T
<br />6. 0' - 8. 0'
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<br />Date: September 2025
<br />Job No: 590-004
<br />Drawn: M. MOKVYTS
<br />Desi fl: M. MOKVYTS
<br />Checked: B. SCHENDERLEIN
<br />Scale: 1" = 150'
<br />Sheet:
<br />
|