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Aggregate Industries, Morrison Quarry <br /> Amendment No.7 to Permit M-1973-021 FN <br /> Morrison,CO <br /> broadcast seeding or hydroseeding. This is a temporary seeding designed to halt erosion of the <br /> stockpile material into the drainage. <br /> South Quarry <br /> Exhibit F.3 shows reclamation within the South Quarry that has been completed along the <br /> western slope above El. 7,350. South Quarry reclamation completed to date totals 4.9 acres. <br /> The upper benches within the South Quarry western slope have been reclaimed utilizing <br /> reclamation slope construction that covers the bench with overburden fill material, placement of <br /> topsoil, and revegetation of the bench surface. <br /> Planned Reclamation <br /> Mine bench configurations include highwall configurations of 40H:80V, 40H:60V, 60H:40V, and <br /> 40H:40V. Mitigation plan details are shown in Exhibit F.4 and Exhibit F.5. Benches above El. <br /> 7,000 will be reclaimed, with the placement of additional reclamation backfill to provide <br /> improved appearance of portions of the quarry that will be visible to the public. This will utilize <br /> the same technique as the currently reclaimed areas within the South Quarry and the western <br /> side of the Central Quarry. Concurrent reclamation is planned such that revegetation of upper <br /> benches will occur prior to excavation at the lower benches. Reclamation will follow excavation <br /> downward, with a general staggering of approximately three to five benches between active <br /> mining and reclamation activities. <br /> Site reclamation at Morrison Quarry also includes approval for two reservoirs for water storage. <br /> Within the reclaimed North Quarry, a permanent reservoir, referred to as Reservoir Site 11, has <br /> been constructed and has an estimated storage capacity of 1,641 acre-feet. The Town of <br /> Morrison uses this reservoir for raw water storage. A former water storage reservoir known as <br /> Reservoir Site I was planned for the Central Quarry. However, after mining activities were <br /> completed in this area, the reclamation plan was updated, and a reservoir was no longer <br /> pursued. Reservoir Site I has been backfilled to El. 6,500 as part of the Central Quarry <br /> reclamation. End uses of the South Quarry are still under consideration. To satisfy bonding <br /> requirements, the end use of Phase IV described below is considered to be a reservoir with no <br /> pit sealing required. Additional hydrogeologic studies, discussed in Exhibit G— Water <br /> Information, are planned to determine feasibility of potential reservoir end uses and evaluate <br /> reclamation requirements. <br /> Access roads, haul roads, and maintenance roadways that are not necessary for future land use <br /> will be reclaimed by rough grading to blend with surround topography, placing topsoil, and <br /> revegetating. Areas where structures are existing at the end of mine life will be cleared of debris <br /> following dismantling and demolition. Debris will be sent to a licensed landfill facility for disposal. <br /> Each area will then be graded to surrounding topography and revegetated according to the <br /> requirements of the section below titled Revegetation. <br /> September 2021 1 26 <br />