2001-12-17_REPORT - M1983067 (13)

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Banks and Gesso, LLC site and several wire and wood fences, which will be removed. The post mining land use will be a lined reservoir with related wildl'rfe habitat. Minins~ Plan Overview The Applicant proposes to develop the site for mining and processing of sand and gravel. Approximately 32.5 acres of the total permit area of approximately 52 acres is proposed for mining (see F~khibit C-3, Mining Plan Map). After mining is complete, the excavated area will be reclaimed as awater-storage reservoir surrounded by an engineered, impermeable bentonite slurry wall that will be constructed prior to mining operations below groundwater levels. The edges of the reservoirs will be reclaimed to shoreline with wetland vegetation gradually establishing itself. The post-mining land use of the property is for water storage and wildl'Ife habitat. Mining Methods The Applicant proposes to dry-mine the property. Initial mining will occur in the northern portion of the property and progress southward. Initial mining operations will include stripping of topsoil and construction of a tailings pond at the southern end of the property. A slung trench will be constructed around the perimeter of the property prior to commencement of mining operations below existing groundwater levels. The slurry wall will be located approximately at a 50 foot offset from the center line of Brighton Road on the east, and at an offset of approximately 35 feet from the property line in other areas. Depiction of the slurry wall on the plans herein is based on field locations and may change according to field conditions. In order to reduce the cost of slung wall installation, the Applicant proposes to excavate material across the site to an elevation of 5010 feet. This is approximately 10 feet below the highest point on the property, but still approximately 5 feet above existing groundwater levels. The top of cut for this excavation will be located approximately 40 feet from the centerline of Brighton Road on the east, and approximately 25 feet from the property line in other areas. Once an excavation elevation of 5010 feet is reached, slung wall construction will begin along the perimeter of the permit area. Upon completion of slurry wall construction, the Applipnt will backfill to original grade to a point approximately 20 feet offset of the slurry wall. At this point mining will commence below groundwater at a near vertical slope, with reclaimed reservoir wall backfilled to a minimum 3:1 slope. Raw material will be excavated with front-end loaders, excavators, and tractors. The material may be loaded on a field conveyor in the mining area and conveyed back to the processing area, or some materials may be excavated with scrapers or off road haul trucks. Shale material may be pushed up with a bulldozer for Adams Coungr- WP, Rezonlrp, Final Plat Stapecoeoti MIne.01045 MogAe Premhr Concrete, inc. fVOVembar, 2001 2