2019-01-18_REVISION - M1974086 (16)

Home Browse Search

4. Topsoil and Overburden Handling In the undisturbed areas,the top 2-10 feet of the mining area is covered with a topsoil material mixed with sizeable basalt rocks. This material is screened for large rocks during excavation. The rocks are used in the construction materials operation, and the remaining topsoil material is used in reclamation. This fine material will be used as a topsoil in the final reclamation of the site. It has been successfully used topsoil on the west side of the ridge,north of the processing area, for some time. Details of this topsoil re-distribution are discussed in Exhibit E: Reclamation Plan. 5. Water Handling All water issues such as availability of water for this operation, consumption rates, dust control, etc. are presented in Exhibit G -Water Information. In general,the Ralston Quarry will divert outside runoff around the site, and contain runoff on disturbed areas until it evaporates. The exception to this is the stormwater systems that can be found in the slide area. These will drain to a designated low point for discharge. Map C-2 shows runoff control structures and general site drainage. 6. Schedule of Operations Mining operations will only occur as dictated by market demand. Mining, crushing and screening may take place in any part of the year. Product will be sold throughout the year, although far less material is expected to be sold in winter months. 7. Jefferson County Impacts and Environmental Impacts Mining is estimated to be 350,000 to 600,000 tons annually. Crushed rock and asphalt will be the products that are sold from the Ralston Quarry. This is a continuation of activities at this site going back several decades. a) Truck traffic: Highway trucks will use the access to Highway 93 via the current private access.No additional access development will be needed as part of this amendment. Ralston Quarry Gm%I t-wicki and Asm iatm PLI(' January 2019 D-6