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.1 Spinardi Associates amounts of vegetation that block the drainage flow to the collection points and since the discharge ' point is concentrated, it is difficult to stop erosion even with an energy dissapator. We believe by properly constructing final, 2:1 engineered slopes and implementing timely hydroseeding, slopes will perform successfully in the long term. Hospital Creek, located in the southwest corner of the project site may be realigned further south along the southern property boundary to increase the mining footprint. There will be a I00-foot setback from the centerline of the Creek to the top of mining. A Mining Plan was developed based on reviewing over 35 borings. This plan is shown in Figure 3 - Mining Plan. Mining depths vary from 70 to 120-feet. The pit bottom slopes gently toward the east. No mining will occur in the groundwater aquifer. r Topsoil will be stripped and stockpiled in berms for use in landscape areas and future reclamation. Overburden and interbedded clays will be used to construct berms, cap silt ponds and backfill temporary slopes from 3/4:1 to the final slope configuration of 2:1. 4.0 SCHEDULE Depending on the length of time required for the permitting process, RMC anticipates beginning mining in January 2004. Excavation of the site is expected to generate over 100 million tons of sand and gravel product over a 60 year time frame. Although sales fluctuates with market demand, RMC anticipates sales to be in the range of 1.7 million tons per year. Reclamation will begin within 2 years after a phase of mining is complete. See Table I - Reclamation Schedule for a timetable of mining and reclamation. 5.0 OPERATIONS The processing plant will consist of conveyors, screens, crushers, and scrubbers and the office will be a series of pre-manufactured buildings. All plant and office facilities will be located in Phase IX just off Koster Road. The preliminary plant layout is shown on Figure 5 - Plant Layout. RMC will use recycled water from silt ponds and well water for water supply. Once silt ponds are established, RMC will recycle the decanted waters from the silt pond for use in washing the sand and gravel and anticipate using approximately 25% well water. Prior to silt ponds being operational RMC will use well water. There will be approximately 40 employees. 3