2009-10-16_REVISION - M1977036 (12)

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1 G w F Y z O rn R O Ill Z w W co E a w a Q U N Z g O g D ❑ C 0 rp (9 Z_ Ln M fV (N 0 CD 0 0 N `m 15 0 LL I 2 11 NOTES: 4 1.) RECLAMATION CONTOURS AS SHOWN ON THE BROWN PROPERTY SHALL TIE INTO THE EXISTING RECLAMATION CONTOURS IN THE GREELEY 35TH AVENUE MINE TO THE EAST AND SOUTH. CONTOURS WILL VARY BASED ON GEOLOGIC AND /OR OTHER SITE CONDITIONS. 2. A MINIMUM OF 6 -12" OF TOPSOIL WILL BE PLACED ON ALL SLOPES ABOVE THE ASSUMED HIGH -WATER LINE. RE- VEGETATION SHALL USE SEED MIXES LISTED IN THE TABLE, OR SIMILAR ALTERNATE MIX BASED ON COMMERCIAL AVAILABILITY AT THE TIME OF RECLAMATION. ALL SUBSTITUTIONS WILL DETERMINED IN CONSULTATION WITH QUALIFIED EXPERTS, AND APPROPRIATE TO THE REGION AND SOIL REGIME, IN ADDITION, A TECHNICAL REVISION TO THE RECLAMATION PLAN WILL BE FILED WITH AND APPROVED BY THE DRMS PRIOR TO PLANTING A DIFFERENT SEED MIXTURE. 3. HIGH WATER LINE IS APPROXIMATE BASED ON AN ASSUMED T FREEBOARD & GROUNDWATER MONITORING BASELINE DATA. 4. SEEDING WILL BE DONE DURING THE FIRST FAVORABLE SEEDING SEASON FOLLOWING TOPSOIL PLACEMENT. BASED ON A RECOMMENDATION FROM THE NRCS, IT IS ANTICIPATED THAT SEEDING WILL BE DONE BETWEEN NOVEMBER 1ST AND APRIL 30TH„ UNLESS WEATHER CONDITIONS REQUIRE SEEDING OUTSIDE THESE MONTHS. IF THE SEED MIX IS BROADCAST SEEDED INSTEAD OF DRILL SEEDED, THE POUNDS OF LIVE SEED PER ACRE APPLIED WILL BE DOUBLED. 5. CERTIFIED WEED -FREE STRAW CRIMPED INTO TOPSOIL WILL BE USED WHERE GRASSES ARE TO BE ESTABLISHED ABOVE THE HIGH -WATER LINE ON RESERVOIR SIDE SLOPES AND THE AREA WILL BE PLANTED INTO A TEMPORARY COVER CROP. 6. ALL PLANT MATERIAL SHALL BE MONITORED FOR DISEASE AND INSECTS. THE CHOICE AND VARIETY OF PLANT MATERIAL SHALL MINIMIZE DISEASE, INSECT AND MAINTENANCE PROBLEMS. DROUGHT TOLERANT, NATIVE OR ADAPTIVE PLANT SPECIES SHALL BE USED TO REVEGETATE THE SITE. GRASSES FOR REVEGETATION ARE SPECIFIED IN THE GRASS SEED MIX LIST. WEEDS SHALL BE MONITORED AND A WEED MANAGEMENT PROGRAM SHALL BE IMPLEMENTED UNTIL VEGETATION IS ESTABLISHED. TEMPORARY IRRIGATION WILL BE PROVIDED IF NECESSARY UNTIL THE VEGETATION IS ESTABLISHED. ALL PLANT MATERIAL AND LANDSCAPING SHALL BE INSTALLED ACCORDING TO THE GENERAL DESIGN STANDARDS OF THE CITY OF GREELEY LAND USE CODE. 7. ANY DISTURBED AREAS NOT DESIGNATED WETLAND OR POND WILL BE SEEDED TO UPLAND GRASSES. PROPOSED SEED MIXES: 5 COMMON NAME SCIENTIFIC NAME VARIETY % OF MIX PLS APPLICATION RATE (Ibs /ac) MESIC /UPLAND AREAS ( DRYLAND GRASS MIX) WESTERN WHEATGRASS AGROPYRON SMITHII ARRIBA 17.0% 1.74 SIDEOATES GRAMA BOUTELOUA CURTIPENDUTA BUTTE 17.5% 1.80 MOUNTAIN BROME BROMUS MARGINATUS BROMAR 17.0% 1.74 PRAIRIE SANDREED CALAMOVILFA LONGIFOLIA GOSHEN 1.0% 0.48 SWITCHGRASS PANICUM VIRGATUM PATHFINDER 7.0 % 0.67 ALKALI SACATON SPOROBOLUS AIROIDES 1.0% 0.10 NEEDLE AND THREAD STIPA COMATA 13.0% 1.29 NORTHERN SWEETVETCH HEDYSARUM BOREALE TIMP. 10.0 % 1.02 ROCKY MTN PENSTEMON PENSTEMON STRICTUS BANDERA 5.0 % 0.46 SCARLET GLOBEMALLOW SPHAERALCEA COCCINEA ARS2936 3.0 % 0.26 PRAIRIE WILDROSE ROSAARKANSANA 8.5 % 0.87 TOTAL LBS /AC 100.0 % 10.43 TRANSITIONAL ZONE/WATERS EDGE AREAS (TRANSITIONAL ZONE MIX) WESTERN WHEATGRASS AGROPYRON SMITHII ARRIBA 10.6% 1.45 SIDEOATES GRAMA BOUTELOUA CURTIPENDUTA BUTTE 9.2% 1.24 CANADA WILDRYE ELYMUS CANADENSIS MANDAN 18.1% 2.47 BASIN WILDRYE ELYMUS CINEREUS MAGNAR 9.8% 1.34 SWITCHGRASS PANICUM VIRGATUM PATHFINDER 5.7% 0.78 SAND DROPSEED SPOROBOLUS CRYPTANDRUS 0.2 % 0.03 SCARLET GLOBEMALLOW SPHAERALCEA COCCINEA ARS2936 3.8% 0.52 AMERICAN VETCH VICAAMERICANA 42.6 % 5.81 TOTAL LBS /AC 100.0 % 13.64 CERTIFICATION: THIS MAP WAS PREPARED BY LAFARGE WEST, INC. AND TETRA TECH. LAFARGE WEST, INC. WILL KEEP THE DIVISION OF RECLAMATION, MINING & SAFETY INFORMED OF ANY CHANGES TO THE MINING OR RECLAMATION PLANS THROUGH ANNUAL REPORTS AND FILE TECHNICAL REVISIONS AND AMENDMENT APPLICATIONS AS NECESSARY THROUGHOUT THE LIFE OF THE MINE. TETRA TECH BY PAMELA FRANCH HORA, AICP SENIOR PLANNER 7 -6 -09 DATE M 7 F] 10 11 GREELEY 35TH AVENUE MINE AMENDMENT TO M- 1977 -036 RECLAMATION DETAILS A PARCEL OF LAND LOCATED IN THE NORTHEAST QUARTER OF SECTION 34, AND A PORTION OF SECTION 35, TOWNSHIP 6 NORTH, RANGE 66 WEST, SIXTH PRINCIPAL MERIDIAN, COUNTY OF WELD, STATE OF COLORADO TETRA TECH www.tetratech.com 1900 S. Sunset Street, Ste. 1 -F Longmont, Colorado 80501 PHONE: (303) 772 -5282 FAX: (303) 772 -7039 4'7 / HIGH WATER TO BE PLANTED t LEVEL WITH UPLAND GRASS MIX ,7S MESIC /UPLAND AREA 10' +/ TRANSITIONAL ZONE /WATER'S EDGE - TO BE PLANTED WITH TRANSITIONAL ZONE MIX CROSS SECTION OF TYPICAL SHORELINE PLANTING DETAIL NOT TO SCALE 4700 TOP OF BANK 4690 CACHE LA POUDRE 4680 RIVE R 4670 ------ 4660 -- 4650 4640 - 4630 -0 +60 -0 +40 -0 +20 ■ PERMIT BOUNDARY EXISTING ■ FENCE TO REMAIN EXISTING 10' WIDE POUDRE RIVER TRAIL 100' MIN. SETBACK FROM TOP OF BANK OF RIVER TO MINING LIMITS - - -T -- 0 +00 0 +20 12 13 14 15 RECLAIMED USES IN DISTURBED AREAS TYPE OF USE ACREAGE RECLAIMED TO UPLAND DRYLAND GRASS 142.3± RECLAIMED TO WETLAND OR UPLAND DRYLAND GRASS 7± RECLAIMED TO OPEN WATER POND 140± INDUSTRIAL USE AREA 56.2± TOTAL 345.5± TRANSITIONAL _ ZONEIWATERS EDGE 4:1 10 APPROX. HIGH w WATERLINE ^ - - -OF d.. ` / / / / / _.3_'t i__...__ RECLA _____ _�__._ _ -_ - THE RECLAMATION CELL / / / / / / / / //< 1 w DEPTH WILL VARY BASED SLOPE Z ON GEOLOGIC AND /OR OTHER SITE CONDITIONS. DEWATERING TRENCH ' 0 +40 0 +60 0 +80 1 +00 1 +20 1 +40 1 +60 OPEN WATER POND TYPICAL CROSS - SECTION SCALE IN FEET 0' 20' MARK DATE DESCRIPTION 1 7 -09 PREPARED 2 110-16-091 REVISED 1 +80 2 +00 I I 2 +20 2 +40 2 +60 BY I Client: LAFARGE WEST, INC. MAIM - � Proj. Loc.: MAM GREELEY 35TH AVENUE MINE AMENDMENT TO M- 1977 -036 EXHIBIT F RECLAMATION DETAILS 16 Project No.: 133 APH Designed By: Drawn By: MAIM Checked By: 3 Tetra Tech