2019-06-27_REVISION - M2018051 (25)

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REVISED Exhibit E: Reclamation Plan Included below is the Reclamation Plan for Black Mountain Sand Weld LLC's(Black Mountain) Lost Creek Mine, an industrial proppant sand mining and production facility located in Weld County, Colorado and is located on 2,215.59 acres of private land.This includes approximately 1,796 acres of affected land for mining activities, processing facilities, and the access road.The remainder of the area will be undisturbed buffer areas, as described in Exhibit D.The active mining areas will be reclaimed concurrently with mining operations. The onsite processing facilities and access road will be reclaimed during the final stage of reclamation. Portions of the facilities and access road will remain as discussed in Section 3.1.5, below.The affected lands will be returned to rangeland after reclamation, consistent with pre-mining conditions. Properties adjacent to the affected lands are unirrigated rangeland, with some agricultural fields in the vicinity.The proposed post-mining land use of rangeland will return the affected land to its current land use and will be in general conformity to the surrounding land. Unsaleable product (based on size requirements) will be inert and used as backfill material in previously mined areas and to backfill the mining pit in phases. Earthmoving will be done primarily with excavators, dozers, and front-end loaders. Compaction of backfilled material will be achieved by'truck compaction' (a common surface mining industry practice), as follows: Haul trucks will deposit backfill material, which will include oversize and clay/feldspar material from the sand wash processing plant and backfill stockpile, as well as previously stockpiled overburden material into mined areas as operations progress.That material will be deposited in layers as it is built up to its proposed post-reclamation depth by front-end loaders and dozers which, by action of the traffic of wheeled and tracked heavy equipment, will perform primary compaction as they prepare safe and efficient running surfaces for the mining trucks and other equipment. As the trucks return backfill material into the mined areas in 'lifts' or'benches', it will form a highly trafficked zone that will effectively further compact the backfilled material. The backfilled and regraded topography will be tied-in to undisturbed topography at slopes that will be hydrologically stable. Given the small decrease in available backfill volume relative to the surface areas of the project site and the generally level topography of the area, it is not anticipated that outside fill material will be needed. If outside fill is deemed necessary, Black Mountain will follow all requirements of Section 3.1.5(9) off the Colorado Mined Land Reclamation Act(the Act) regarding importing inert fill materials. Once the backfilled and compacted materials reach their full depth, the area will be graded and contoured to conform to the surrounding landscape and to provide hydrological stability. Final proposed contours are shown on Exhibit F, Reclamation Plan Map. Stockpiled topsoil will be spread over the area,the area will be disced or ripped and then seeded with the approved seed mix. Straw crimping will be completed per Weld County's seeding recommendations. Reclaimed areas will not be irrigated.See Table E2 for the proposed seed mix. Black Mountain is proposing that the reclamation bonding requirement be revisited on a regrade phase basis, as shown in Table E1, to ensure that the bond amount is sufficient to cover the then current mining, reclamation, and site conditions. It is proposed that bonding be revisited prior to the beginning of each new regrade phase. This will ensure some flexibility to the plan. Topsoil Segregation, Preservation, and Replacement All topsoil will be segregated and stored on affected land perimeters or other such areas that will minimize the disturbance of topsoil stockpiles.Topsoil at the site is currently estimated to be approximately 2 feet 1