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<br /> <br />Bear Creek Quarry (M-1977-344) Permit Amendment <br />Holcim US Inc, 3500 Highway 120, Florence, CO 81226 <br />Phone (719) 288-1443 www.holcim.us 59 <br /> <br />Figure 2.5.1-1 Cross-section of benched highwall and final reclamation slope 3H:1V <br />While distributing the plant growth material, erosion furrows will be contoured into the bench slopes to <br />mitigate erosion. The furrows will be contoured parallel to the edge of the bench and approximately <br />midway between the edge of the bench to the highwall. Erosion furrows are preferred to straw waddles <br />since they can remain after reclamation vegetation takes hold. This increases precipitation infiltration time <br />for the new and ultimately established vegetation. <br />Seeding will occur either in the fall or spring with the seed mix presented in Table 2.5.1-1. This seed mix <br />was approved by DRMS in the AM-01 for BCQ. Seed will be broadcast at the rate of 111.5 pounds of live <br />seed per acre, mulched with certified weed free straw, two tons per acre, and tracked into place with a <br />dozer. Fertilizer was not recommended by NRCS. A noxious weed program will utilize chemical weed <br />control if noxious weeds start establishing in the affected land areas that are not controlled by mowing. <br />Table 2.5.1-1 NRCS Reclamation Seed Mix <br />Species Variety Required PLS* <br />Rate/Acre <br />% of <br />Species in <br />Mixture <br />PLS Seeding <br />Rate Per <br />Species/Acre <br />Sideoats gramma Niner, El Reno 18.0 20 3.6 <br />Crested Wheatgrass Hycrest 10.0 20 2.0 <br />Indian Ricegrass Nezpar 12.5 15 1.9 <br />Mammath Wildrye Volga 30.0 20 6.0 <br />Alkali Sacaton None specified 3.0 10 0.3 <br />Streambank Wheatgrass Sodar 22.0 10 2.2 <br />Alfalfa Ladak 16.0 5 0.8 <br /> 111.5 PLS/Acre <br />*PLS – Pounds live seed per acre <br /> <br />2.5.2 Reclamation of Mine Infrastructure <br />Once mining ceases, all infrastructure including conveyor system, buildings, and utility infrastructure will <br />be removed from the permit area. The metal buildings will be disassembled and scrapped to a metal <br />recycler. Utility lines will be excavated and electricity distribution poles removed. The septic vault will be <br />drained, excavated and placed in the concrete scrap stockpile. The conveyor will be disassembled; either <br />sold, transported to another Holcim quarry or scrapped. The crushers and screens will be sold or <br />transported to another Holcim quarry. Concrete structures such as conveyor supports, building slabs, <br />septic vault, etc. will be stockpiled and eventually crushed and used as backfill in final slope rebuilding.