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No permanent plant or office facilities will be built onsite. <br /> 3. Overburden and Topsoil Handling <br /> Initial earthmoving will consist of stripping 0-24 inches of topsoil and approximately six feet of <br /> overburden from areas to be disturbed. These stripping thicknesses are based on the soil survey <br /> for the operation and operational experience at the 23 Road Pit to the west. For the purpose of <br /> the material balance, 12 inches of topsoil and six feet of overburden are assumed. All <br /> earthmoving will be done using mining equipment suitable for this type of operation including <br /> the following: front end loader, dozer, excavator, and water trucks. Topsoil and overburden will <br /> be direct placed, as much as possible,with stockpiling as needed in the designated stockpile <br /> areas (Map C-3). Stockpiles to be in place longer than 90 days will be seeded with the permanent <br /> seed mix to prevent erosion(see Exhibit E for seed mix information). Table D-2 details a <br /> breakdown of the overall material balance of the project during mining. <br /> Table D-2. Topsoil and Overburden Material Generated During Mining <br /> Material <br /> Generated(CY) <br /> Topsoil 66,800 <br /> Overburden 400,700 <br /> ........._ ---................ <br /> All topsoil stripped during mining operations will be used in contemporaneous reclamation or <br /> used at other sites to improve reclamation there. The presence of the lake means that there will <br /> be more topsoil generated by stripping activities than needed for reclamation activities. Details <br /> pertaining to reclamation can be found in Exhibit E. <br /> 4. Stormwater—Diversions and Impoundments. <br /> Surface water from storms, known as stormwater runoff,will be collected in the mining pit <br /> during operations. As shown on Map G-1,the local drainage area consists principally of the 23 '/4 <br /> West Pit and immediate area. The pit will act as a sediment pond during operations.No diversion <br /> of upstream waters will occur. Impounding of water will only be temporary,to trap sediment, <br /> with all stormwater runoff leaving the site within 72 hours. Exhibit G covers surface water <br /> management in detail. <br /> 23 114 West D-4 <br /> July 2020 (:n I.ewir6i and 1ssncial PI.I.(' <br />