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MINING HIGHWALL <br />HISTORIC GROUND <br />z� <br />Z� <br />:2 J <br />MINING HIGHWALL— <br />OVERBURDEN <br />BACKFILL RECLAMATION <br />SURFACE <br />GRADED TO DRAIN <br />AVERAGE NORMAL <br />GROUNDWATER <br />SURFACE <br />0 � <br />Z� <br />zg <br />� J <br />N.T.S. <br />300 0 300 600 900 <br />( IN FEET <br />1 inch = 300 ft. <br />LEGEND: <br />PERMIT BOUNDARY <br />PROPOSED HAUL ROAD <br />PROPOSED MINING LIMITS <br />EXISTING PARCELS <br />EXISTING DITCH <br />EXISTING GAS LINE GAS — <br />EXISTING OVERHEAD ELECTRIC OHE <br />EXISTING EASEMENT - _ _ _ _ - <br />EXISTING 5 FOOT CONTOUR - -. — ---4880— — <br />EXISTING 25 FOOT CONTOUR ----4700-- <br />PROPOSED <br />---4700-- <br />PROPOSED 5 FOOT CONTOUR 4880 <br />PROPOSED 25 FOOT CONTOUR 70U— <br />NOTES: <br />1. THE PROPOSED FINAL LAND USE FOR THE IRWIN/THOMAS MINE IS GENERAL AGRICULTURE. <br />2. RECLAMATION PLAN MAP ILLUSTRATES CONDITIONS WHEN ADEQUATE QUANTITIES OF <br />OFF-SITE BACKFILL MATERIAL IS AVAILABLE BUT A PERMANENT SOURCE OF WATER FOR <br />LONG-TERM AUGMENTATION OF EXPOSED GROUNDWATER COULD NOT BEEN OBTAINED. <br />MINE CELLS WILL BE BACKFILLED TO CREATE UPLAND AREAS. <br />3. IF A LONG-TERM AUGMENTATION PLAN IS NOT AVAILABLE, MINING WILL NOT PROGRESS <br />INTO MA2, MA3, OR MA4 AND EXISTING CONDITIONS WILL REMAIN UNDISTURBED. <br />4. ALL SLOPES SHALL BE GRADED TO 3HAV OR FLATTER. SLOPES WITHIN THE ST. VRAIN <br />CREEK DELINEATED 100 -YEAR FLOODPLAIN SHALL BE GRADED TO 4HAV OR FLATTER. <br />ROUGH GRADING WILL ESTABLISH FINAL ELEVATIONS, SLOPES, AND TRANSITIONS. <br />TRANSITIONS BETWEEN BACKFILLED AREAS AND EXISTING GROUND SHALL BE GRADED <br />WITH A SMOOTH, GRADUAL TOPOGRAPHY. <br />5. FINAL GRADING WILL INCLUDE ADDITION OF TOPSOIL AND SURFACE PREPARATION FOR <br />REVEGETATION. SPECIAL ATTENTION SHALL BE GIVEN TO TRANSITIONS FROM RECLAIMED <br />AREAS TO UNDISTURBED LAND. <br />6. ALL AVAILABLE TOPSOIL AND OVERBURDEN MATERIAL WILL BE USED FOR BACKFILLING <br />AND RECLAMATION. <br />7. THE GROWTH MEDIUM FOR REVEGETATION WILL BE A COMBINATION OF OVERBURDEN AND <br />TOPSOILS. <br />8. THE RECLAMATION SEED MIX WILL PROVIDE QUICK SOIL STABILIZATION AND EROSION <br />CONTROL. THE MIX WILL ALLOW FOR FURTHER AGRICULTURAL OR OTHER DEVELOPMENT <br />EXPECTED TO OCCUR FOLLOWING PERMIT RELEASE. <br />Upland Grass Seed - Soil Stabilization <br />P icat>Ion ate <br />#PLS/acre <br />Intermediate Wheatgrass <br />3 <br />Blue Grama <br />- ----- ------ <br />0.75 <br />Alfalfa <br />0.75 <br />TOTAL---_--------- <br />------ <br />4.5-- <br />'AppTication rate is for drill seeding: If see to be Groadcast,tTie <br />application_ rate will be doubled. <br />9. GRASS SEED WILL BE PLANTED WITH A DRILL EQUIPPED WITH DEPTH BANDS AND PRESS <br />WHEELS. THE SEEDED AREA WILL THEN BE COVERED WITH CERTIFIED WEED -LESS STRAW <br />MULCH AT A RATE OF 2,000 POUNDS PER ACRE. THE STRAW WILL BE CRIMPED INTO THE <br />SOIL TO CONTROL EROSION UNTIL THE GRASS BECOMES ESTABLISHED. <br />10. DRILL SEEDING IS THE PREFERRED METHOD FOR REVEGETATION. IF BROADCAST <br />SEEDING IS NECESSARY ON MOIST SOILS, STEEP SLOPES, OR IN EXCESSIVELY ROCKY <br />AREAS, SUCCESS' CAN BE ENCOURAGED BY BROADCASTING ONTO GROWTH MEDIUM THAT <br />IS VERY LOOSE. IF THE SEED IS BROADCAST IN THOSE CIRCUMSTANCES, THEN THE <br />SEEDED AREA WILL BE DRAGGED TO HELP BURY THE SEED. <br />11. 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 />12. THE MINE OFFICE/SCALE HOUSE TRAILER AND ANY OTHER STRUCTURES ASSOCIATED <br />WITH MINING WILL BE REMOVED FROM THE SITE DURING FINAL RECLAMATION ACTIVITIES. <br />13. BEST MANAGEMENT PRACTICES WILL BE USED TO CONTROL EROSION AND STORMWATER <br />SUSPENDED SEDIMENT RUNOFF FROM THE SITE DURING RECLAMATION ACTIVITIES. <br />CALL UTILITY NOTIFICATION CENTER OF <br />COLORADO <br />i <br />Know what's below. <br />Cali before you dig. <br />CALL 2 BUSINESS DAYS IN ADVANCE BEFORE <br />YOU DIG, GRADE, OR EXCAVATE FOR THE <br />MARKING OF UNDERGROUND MEMBER UTILITIES. <br />0 <br />0 <br />M <br />O <br />a� <br />0 <br />Z <br />N <br />N <br />v o <br />--� co <br />J <br />0 <br />0o <br />o <br />o t) <br />wm o <br />U <br />©' o <br />ED ti U_ <br />, z <br />C <br />O <br />r� <br />z <br />w <br />L. _.._, <br />c� <br />cn <br />a4- <br />0 <br />to <br />U. <br />'Y#=, <br />LLI <br />` <br />LL co <br />L.- CO <br />E- 0 Z <br />LLJ Z Z <br />W <br />cn 0- <br />-W C: <br />Z <br />— O <br />U) <br />0W <br />� <br />W <br />_ <br />O <br />Z <br />V <br />Q <br />W <br />❑ <br />J <br />O <br />L—L <br />Z <br />Z <br />_O <br />�. <br />I— <br />Z <br />C) <br />_J <br />Z <br />0 <br />ce) <br />< <br />CL <br />Q <br />f <br />J <br />� <br />Z <br />ry <br />0 <br />W <br />N <br />X <br />W <br />1� <br />J <br />J <br />�D <br />V <br />W <br />Date: <br />October, 2018 <br />Job No: <br />590-008 <br />Drawn: C. <br />Snowdon <br />Design: B. SCHENDERLEIN <br />Checked: B. SCHENDERLEIN <br />Scale: <br />1 " = 200' <br />Sheet: <br />3 <br />of <br />