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EXHIBIT "C" NORTH OF DOUGLAS PASS MINING PLAN This pit is a source for borrow material to widen the shoulders of Highway 139 and provide fill to maintain the Highway across Douglas Pass. Douglas Pass is located on a lazge active landslide and occasionally requires reconstruction of the roadway when it moves.. Since shale rock is unsuitable for making hot mixed bituminous pavement, it is unlikely that the pi[ will be used for crushing aggregates or producing hot bituminous pavement. The only processing of rock would be screening through a grizzly using a loader. The expected life of the pit is 20 to 30 yeazs. Historic use has been about 1,000 cubic yazds per year. Excavation will be by dozer, loader and truck. Blasting is not anticipated. The existing pit slope is about 1/4:1 or 1/2:1 over 100 feet high. The additional acreage provided by this permit will allow the pit slope: to be layed back to an average slope of 1:1. As the slope is excavated back to 1:1, the top of the slope will fall on the back side of the ridge, decreasing the present height of the back slope. The rock slope will be left inegulaz and the average 1:1 slope may contain azeas as steep as 1/4:1 intermixed with benches. The bottom of the existing pit will l not be excavated below existing elevation. See the mining plan map, Exhibit "E". J No ground water has teen encountered within the pit limits. Therefore, dewatering will not be required. No water will be required in the excavation or processing of fill material. Although West Douglas Creelc is adjacent to the easterly pit boundary, surface runoff should not reach the creek. The pit bottom is graded to drain to [he south and east and a bean along the easterly edge has contains the surface runoff. CDOT has a NPDES permit and Storm Water Management Plan with Colorado Department of Health for surface runoff of all pits. There will be no fuels or other chemicals stored in the pit for excavation of bonow~ materials. We have no plans I.o process crushed rock or produce hot mixed pavement. . No water will be required during excavation of borrow materials. Maximum disturbed azea should not exceed 11 acres and the maximun actively mined area should not exceed about '7 acres. The existing berm located on the southerly edge of the pit will contain most of surface nmoff. Topsoil will be stripped from new azeas to be excavated and saved for replacement on the flat pit bottom or any slopes I %:1 or flatter. Only topsoiled azeas will be seeded. The rock slopes steeper than 1 %::1 will not be topsoiled. Reclamation of finished slopes will begin as the final volume to be removed from the pit can be estimated.