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PC: 9-6-90 OX-90-1 The existing quarry site contains approximately 195 acres, of which only 12 acres remain to be excavated. The remainder of the parcels , approximately 153 acres, have been quarried, reclaimed, and returned to agricultural uses . OPERATIONAL CHARACTERISTICS: The proposed quarry operation generally consists of (1) the setting aside of topsoil and other overburden, (2) extraction of underlying aggregate resource, (3) replacement of soil and other overburden, (4) recontouring of ground surface for site rehabilitation, and (5) return of land to agricultural use. Quarry operations at the proposed site would occur in two five-year phases . The first phase of development would occur in the southern section of the parcel and would involve extraction of an estimated 1 . 3 million tons of material . The second phase would occur to the north of the first phase and would extract an estimated 1 . 1 million tons of material . The overburden to be removed consists of sandy, clayey silt and ranges in thickness from zero to eight feet. Overburden from the first north-to-south excavaton strip would be excavated and transported to a suitable on-site location for stockpiling. Stockpiles would be laid down in windrow fashion and would not exceed ten feet in height. Once the overburden has been removed, the aggregate material would be excavated and transported to the processing facility. The maximum depth of the aggregate material has been estimated to be 20 feet below the existing ground surface, based on data from borings in the proposed quarry area. Once the aggregate has been removed from the 100- to 200-foot-wide excavation strip, the overburden from the adjacent excavation strip would be removed and placed in the trench from the previous excavation. This process would continue across the parcel until the completion of each phase. The variable depth (or thickness) of the overburden and aggregate material would make final placement of the excavated overburden difficult during active resource excavation. For this reason, the applicant proposes to delay final contouring and rehabilitation until the completion of each phase; however, temporary resoiling and revegetation will be conducted following resource extraction from each strip (up to 5 . 5 acres each) . When the first phase has been completed, final contouring of the land surface would occur, and extraction operations for the second phase would begin. Once final contouring has been completed at the end of each phase, slopes would be seeded with native grasses, and the level areas would be planted with cereal grasses and/or various row crops and/or orchards. -23-