2010-01-12_REVISION - M1977036 (10)

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1 J I: G F E 1 C 3 E 3 NOTES: 4 5 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 SHOWN FOR THE GREELEY 35TH AVENUE MINE ARE CONCEPTUAL AND WILL VARY BASED ON GEOLOGIC AND /OR OTHER SITE CONDITIONS. 2. A MINIMUM OF 6" 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 INTOA 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: D COMMON NAME SCIENTIFIC NAME VARIETY % OF MIX PLS APPLICATION RATE (Ibs /ac) MESIC /UPLAND AREAS ( DRYLAND GRASS MIX) 60.5± 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 ZONEIWATERS 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 VILA AMERICANA 42.6 % 5.81 TOTAL LBS /AC 100.0 % 13.64 CERTIFICATION: A 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. "AM04_� 1 -12 -10 TETRA TECH BY DATE PAMELA FRANCH HORA, AICP SENIOR PLANNER 7 3 E 10 11 12 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 HIGH WATER_ LEVEL . TO BE PLANTED WITH UPLAND GRASS MIX i�� SCOP2 O \/R � iii i R 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 13 14 15 16 RECLAIMED USES IN DISTURBED AREAS TYPE OF USE ACREAGE RECLAIMED TO UPLAND DRYLAND GRASS 90.5± RECLAIMED TO WETLAND OR UPLAND DRYLAND GRASS 60.5± RECLAIMED TO OPEN WATER POND 139.0± INDUSTRIAL USE AREA 55.5± TOTAL 345.5± I PERMIT BOUNDARY 4700 ............. -� TOP OF XISTING ( EXISTING 4690 I BAN N K I ENCE TO REM GRADE TRANSITIONAL ZONE/WATE i S EDGE. - ( - LA H LA ERE 10' APPROX' 1 - WATER LINE H a 4680 EXISTING 10' r // / / / / / / / / / /� / /..... - �� i --2Oi_ - i 4670 3 'jOR F TTER) RE LAIME� -- 2 Wp _a0. --- - THE RECLAMATION CELL w DEPTH WILL VARY BASED / IV (9 ON GEOLOGIC AND /OR f.. /l/Il lll/ / /Lrl SLOPE a % %! % % % %O I -SITE OTHER SITE CONDITIONS. j ...._E �- 4660 100'RIVERTT MICNINGOMT0 OFBA�KOF 4 RFLA ER 0 _- "' -" rrr r >rr rrrr rrrrr r /rrrrr - Q = _ I( II I I I 4650 __... L. i i_ i {.. i (, ) - - - - -� i ;;;; ;;;; -I- - - -- 4640 - ... _.. _ -j 4630 j -0 +60 -0 +40 -0 +20 0 +00 0 +20 0 +40 0 +60 0 +80 1 +00 1 +20 1+40 1 +60 1 +80 2 +00 2 +20 2 +40 2 +60 OPEN WATER POND TYPICAL CROSS - SECTION SCALE IN FEET 0' 20' MARK I DATE DESCRIPTION BY 1 7 -09 PREPARED MAM TETRA TECH 2 10 -16 -09 REVISED MAM 3 12 -11 -09 REVISED MAM 4 1 -12 -10 REVISED PER COMMENTS MAM www.tetrateGh.com 1900 S. Sunset Street, Ste. 1 -F Longmont, Colorado 80501 PHONE: (303) 772 -5282 FAX: (303) 772 -7039 RECEPMD JAN 12 2010 w wK $r 17 Client: LAFARGE WEST, INC. Project No.: 133 - 23511 -08005 Proj. Loc.: Designed By: -- GREELEY 35TH AVENUE MINE Drawn By: MAM Checked By: PH AMENDMENT TO M- 1977 -036 EXHIBIT IF 3 RECLAMATION DETAILS Copyright: Tetra