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s J Exhibit C Mining Plan • The plan is to develop a Limestone quarry at this site beginning in April 2000. The proposal is fora ]0 year period with the reclamation beginning in the year 2010 or earlier. Exhausted areas will be reclaimed using topsoil saved from the initial stripping and from the mining progression. Topsoil and waste rock will be placed in berms along the perimeter of the mining areas. Topsoil at this site is between 6 and 12 inches. This loamy material will be stripped using bull dozer and track excavators. This material will be placed in berms along the north side o(the active mining areas. Topsoil berms will be graded with side slopes no steeper than 3 horizontal to 1 vertical. The topsoil berms shall be seeded with Sideoats gramnta grass. Bluestem and Western Wheatgrass to stabilize and provide erosion control. Waste rock, if any, will be primarily the shallow shale (1-2 feet deep) located behveen the surface soil and the limestone rock. The shale will be stripped using the track excavator and bulldozer. This material Hill be placed in separate berms, also located along the perimeter of the mine. Some of the shale may be used offsite for road fill. Shale berms will be used to separate the active quarry area from the arroyo and provide for stormwater collection. This will mininuze erosion and sedimentation caused by flash flooding in the arroyo. These bernts shall be graded and track walked perpendicular to the contour for erosion control. The graded shale berms should be seeded with above grass seed mixture for stabilization. The total depth of the limestone deposit at this site is unknown. This proposal is to none the limestone to a depth that is approximately 3 feet above the bottom of the arroyo. The total depth of the mining operation will be approximately 20 feet. Keeping the mine bottom above the arroyo will effectively separate the quam from potential inundation by flash flooding in the arroyo. This will also allow the wnstruction of a storntwater and sediment pond to be constructed within the quarry, but separate from the arroyo. Key Equipment for the mining operation will include: a track excavator, rubber tired loader, dozer, and dump trucks. The track excavator will dig and break the limestone into manageable size. The limestone deposit is heavily layered. It is anticipated that the limestone will readily break and cleave. The rock will be sorted as it is mined. Some of the product will be hauled directly off the site and some will be stockpiled on site. Rubber tire loaders will be used for loading the limestone. The new mining will begin at the at the disturbed rock outcrop. This will include access through the existing disturbed area. Topsoil and overburden will be stripped and pushed to the north out of the way of- the active operation. The shale will be striped and used to construct the access road. Mining will proceed with the excavator digging toward the east. Slabs of limestone will be broken and loaded into trucks. The limestone will be sorted into three sizes of riprap and placed into stockpiles. The bulk of the limestone produced here is destined to be used for mine drainage stabilization at the Suwnitville Superfund site. A new access road will be constructed from Highway 211 to the quarry site. This road will be approximately 1600 feet long. The road will replace the historical vehicle access up the arroyo. Road construction will be done using the local shale and placing a 12 to 18 inch base over the native ground. The road will be 15 feet wide with a slight crown for drainage. The road will be constrncted in a 30 foot easement from the highway to the quam site. there is an existing cross culvert on Highway 211 near the proposed intersection. No additional culverts are required.