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HomeMy WebLinkAbout1.07 Reclamation planDivision of Reclamation Mining & Safety Permit Application RTZ INDUSTRIAL SAND & GRAVEL MINING OPERATION GARFIELD COUNTY, COLORADO 6.4.1 EXHIBIT G — Reclamation Plan Introduction The RTZ Industrial mining plan proposes to use 130.558 acres for the gravel mining activities, of which 40.7 acres will actually be mined. The mining and reclamation is to proceed in three phases with reclamation of each phase following closely behind each mining phase. All of the affected land is to be reclaimed. Reclamation will include (1) contouring and stabilization of slopes, (2) placement of topsoil and soil amendments, (3) seeding and planting and (4) follow -up monitoring and management to ensure adequate soil cover and noxious weed suppression (See Figure 9A -9C, Reclamation Plan). Topsoil Preservation Topsoil will be removed prior to mining each phase and will be stockpiled in mounds on the western end of the property. A temporary seed mixture, following the recommendations of the Natural Resource Conservation Service (NRCA) (See attached NRCA seed recommendations), will be applied by broadcasting to help stabilize the soil against wind and water erosion. When broadcast seeding is used the seeding rate will be doubled per NRCA recommendations. Certified weed free hay or straw will be used for mulch, except where the slope exceeds 10 percent. In those instances an agronomy blanket is to be used. Final Contouring The Reclamation Plan, Exhibit 9A -9C, shows the proposed final contours. Per Construction Materials Rule 3.1.5 (7), final slopes will be no greater than 3:1 (H:V) for 5 feet above and ten feet below the water table. Most other slopes will be 2:1. The base of the pit is expected to be at or near bedrock, which in most areas will be approximately 24 feet below ground surface. Final grading is to be accomplished by the excavation equipment onsite. All grading is to be completed in a manner to control erosion and siltation of the affected lands. All back#illing and grading shall be completed as soon as feasible after the mining process. Areas that are to be backflled will be compacted to provide stable slopes. If farm equipment is to be used for topsoil mixing and for planting, final contours will be compatible with these activities. Uvision ofRedamation Mining & 5afety Permit Application Topsoil Redistribution The fall season is the best planting time to provide optimum plant survival. Topsoil will be taken from the stockpile and redistributed to disturbed areas after slope stabilization has occurred and in line with the planting seasons. Three to six inches of topsoil and soil amendments will be mixed using a disk harrow or other such equipment. Seeding and Planting Seeding of the NRCS- recommended dry land grasses will be undertaken during prime planting seasons, October 15 through April 30. Seed mixtures recommended by the NRCS, as stated in the attached letter, will be used. The letter includes recommendations for rates and methods for seeding and planting. These recommendations will be followed as closely as possible to provide the best conditions for maximum plant survival rates. Seeding of the larger areas will be completed during the first prime planting season following the completion of mining, contouring and topsoiling of each phase of the project. Planting may proceed prior to the end a phase of the project if contouring and topsoiling are completed and it is in line with sound engineering practices. Seeding will be accompanied by straw or hay mulch or its equivalent. Planting will be accomplished using a seed drill using a drill spacing of 7 — 10 inches. Planting depth will be % to f inch. If the seed is broadcast the seed coverage will be twice that shown in the NRCS recommendations and mulched, if needed, Follow-up Monitoring and Management Management of the reclaimed area will proceed according to NRCS guidelines. RTZ will monitor the plant growth progress and add soil amendments, including fertilizer, if needed. Grasses will be mowed for at least the first two years after reclamation of each phase to establish regenerating stands of grasses and to control weed infestation. Noxious Weed Control RTZ Industrial will control noxious weeds using the recommendations of the Colorado Noxious Weed Management Act and the Garfield County Vegetation Management Department. Weeds listed by Garfield County as noxious are shown below: Common Name Scientific Name Leafy Spurge (Euphorbia esula) Russian Knapweed (Acroptilon repens) Division of Reclamation Mining & Safety Permit Application Yellow Starthistle Plumeless Thistle Houndstongue Common Burdock Scotch Thistle Canada Thistle Spotted Knapweed Diffuse Knapweed Dalmatian Toadflax Yellow Toadflax Hoary Cress Salt Cedar Oxeye Daisy Jointed Goatgrass Chicory Musk Thistle Purple Loosestrife Russian Olive (Centaurea solstitalis) (Carduus acanthoides) (Cynoglossum officinale) (Arctium minus) (Onopordum acanthium) (Cirsium arvense) (Centaurea maculosa) (Centaurea diffusa) (Linaria dalmatica) (Linaria vulgaris) (Cardaria drabs) ( Tamarix parviflora, Tamarix ramosissima) (Chrysanthemum leucantheum) (Aegilops cylindrical) (Cichorium intybus) (Carduus nutans) (Lythrum salicaria) (Elaeagnus angustifolia) Management of the weeds will be by physical removal, chemical spraying or by other means as recommended in the state and county programs. Monitoring and control of new possible infestations will also be followed according to the recommendations of Garfield County Vegetation Management Department. r C Pit Boundary '1�1 -- - - ------------- MINING PHASE III POND RECLAMATION PHASE II 13,6 Surface Acres NOTE: All pond grading is 3 :1 for 19 feet in Pond Depth per Colorado Division of Miming and Reclamation Construction Materials Rule 3.1.5 (7) Now son= at 14=d >a Uft 41�" F"t i' NOTE: Top of Surface Elevation for Water Level on both ponds are 4999 feet. All banks are at 5:1 and 3:1 slopes to 10 feet below water surface. 0 c-_-1 DATE REVISION MAYS VMKV AF FU FIGURE NO. BY I FINAL PHASE II RTZ INDUSTRIAL RECLAMATION PLAN SCALE: I DATE: I SHEET: I " 250' NOV Z8, 2448 flF 3 // ZANCANELCA AND ASSOCYATES, INC. 9 B DRAWN BY: CHKD BY; I APPO BY: DRAYANG; N INEZRING CMSUL TANTS AW2 AHfl - -- dw POST OMCE box 1406 1011 DRANO AYE7tlFE PROJECT. 28419 9 GLENWOOD SPRINGS. COLORADO 81 602 (970) 645 -5700 J 7 L 77 W� f) f f I DATE I REVISION RECLAMATION PLAN PHASE I RTZ INDUSTRIAL kL�� DATE: SHE IVELA A1Y,0 ASSOCIWY�S INC 1 250' SEPT 16, 2008 1 OF 3 Z,41VCA NWN OYi�CHKD BY: JAPP) BY: DRAWING: POST OFFICE BOX 1900 - 1011 GRAND AVENUE dwg CLENY1000 SPRINGS, COLORADO 81502 (970) 945-5700 FIGURE NO. 9 A "ROJECT- 25419 I�- b 1 Pit Bouny ary MINING PHASE Ii I I ; C � 1 V-�6�2 �-21: V-L-1 POND RECLAMATION PHASE 1 9.1 Surface Acres NOTE: All pond grading is 3 :1 for 10 feet in Pond Depth per Colorado Division of Mining and Reclamation Construction Materials Rule 3.1,5 (7) a C::yl is MINING PHASE III NOTE: Top of Surface Elevation for Water Level on both ponds are 4999 feet. All banks are at 5:1 and 3:1 slopes to 10 feet below water surface. 0 DATE REVISION MAUL C:nRU nrry FIGURE NO. BY FINAL PHASE I RTZ INDUSTRIAL RECLAMATION PLAN SCALE: I DATE: I SHEET: V - 2,50' 1 Nov 26, 2008 11 1 OF 3 ZANGAN£LL 4 AND ASSOCIATES INC. 9 A DRAWN BY: CHKD BY: APPD BY: I ORAWING: ENa 1Z- 1-R1N6 TAN7S POST I OR197)94AWZ AWZ - -- See Footer --GS, COLOADO016022 (05 -5706 FROJEC �g419 17 Pit Boun#ry f "9,60 do POND :RECLAMATION PHASE III 19.4 Surface Acres NOTE: All pond grading is 3:1 for 10 feet in Pond Depth per Colorado Division of Mining and Reclamation Construction Materials Rule 3.1.5 (7) 1 woo* r p of Surface Elevation r Level on both ponds 3 feet. All banks are d 3:1 slopes to 10 feet )w water surface. n ©ATE REVISION MADE CHKD APPD FIGURE NO. BY BY 13Y FINAL PHASE III RTZ INDUSTRIAL RECLAMATION PLAN SCALE: DATE: SHEET: V Q 256` NOV 28, 2008 3 OF 3 Z.4N0A1VCZLA XND A'SS001,47F5 NO 9C DRAWN BY: CHKD BY: APPD BY: DRAWING: EN INEERIW CONSUL T.4 POST GFFIGE 6010 1968 - 1011 GRAND AVENUE PROJECT: AWL'. AWZ -- -- .dwg GLENWOOD SPRINGS, COLORADO' 61602 (970) 945 -5700 28419