2013-05-23_PERMIT FILE - M2013031

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Exhibit Page 12 then south to minimize impact (visibility, noise, dust). The downhill edge of the area to be mined will consist of an external berm (doubling as a topsoil and overburden stockpile) with an interior swale, and the two sediment basins. All this will be built as clearing, grubbing, and stripping proceeds, and in advance of more mining in the lettered areas. The purpose of these is to reduce visual impact, control storm water runoff, erosion and deposition, and allow better control of dust and noise. This berm will be built roughly along the 7440 elevation line, and with the swale will be approximately 10 acres in size. Depth of mining will range from 5 feet of sand and gravel (plus any soil and overburden, estimated at maximum of 10 -12 feet total), to 50 feet of sand and gravel plus overburden. The floor of the pit will slope upwards to the north, similar to the existing terrain. Mining will generally include all areas with sand and gravel. The exception to this will be establishment of a 200 -foot circular area around the WAPA pylon in Area Q (on Map C -2). To prevent any damage to this structure (located on the landowners' property through an easement granted to WAPA), no mining will be done in this area, near the towers, as shown in the cross - section. Mining in Area Q will be limited to ensure that the road along the easement is usable at all times. According to the landowner to the north, only WAPA is authorized to use the road and locked gate in the fence to cross into the property to the north. The edges of the 200 -ft circles around the pylons will be backfilled as soon as possible to avoid erosion or slumping. Access to the pylons will be maintained by ramps, and the roadway along and crossing the powerline will be maintained and replaced as part of mining and reclamation operations. The roads will continue to be used by the mining personnel and the landowner before, during, and after mining. The area immediately around each pylon will be inspected by an engineer before, during, and after excavation in the vicinity, routinely until reclamation is complete and released, for stability and erosion problems to allow quick response to problems. Mining will be conducted in a relatively continuous manner but limited by seasonal weather conditions. Multiple, separate work areas, in and outside the mining area, improve winter access for customers, so materials may be hauled year- round. No livestock grazing is planned for work or mining area during operations.