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Excavation in the past exposed groundwater and was immediately reburied at depths below 20 <br /> feet. Therefore, it is assumed that the groundwater table is more than 20 feet underground. <br /> Mining will progress through the areas in numerical order moving from north to south. Topsoil <br /> and overburden from a new area will be used to reclaim the previous area. This will reduce <br /> material moving as well as reduce the maximum area to be reclaimed. A table of expected <br /> mining lives for each area is included in Table D-1. The life of each pit is based on the <br /> anticipated annual average tonnage. <br /> No explosives will be used in conjunction with the mining operation. <br /> 2. Mining Timetable <br /> The following timetable is a best estimate of the sequence of operations for the life of the mine <br /> after June 2018 and is based on mining 10 feet of gravel and selling 10,000 tons of total product <br /> per year. Area locations are shown on Map C-2, Appendix 2. <br /> Table D-1 Mining Timetable <br /> Area Mining Time Material Quantity <br /> 1 0 Years Mined out Tons <br /> 2 8 Years 78,100 Tons <br /> 3 10 Years 96,600 Tons <br /> 4 14 Years 143,900 Tons <br /> 5 13 Years 127,000 Tons <br /> 6 13 Years 125,400 Tons <br /> 7 8 Years 81,600 Tons <br /> Total 66 Years 652,600 Tons <br /> The mining schedule is planned to minimize disturbance by reclaiming areas as additional <br /> mining is undertaken. Note: If large contracts are awarded to the site, production could increase <br /> to the permit maximum, thereby curtailing the life of the pit. On the other hand, if contracts are <br /> less than anticipated, the life of the pit could be extended. This table is based on a reasonable <br /> projection of average production rates. <br /> Yevoli Cobblestone Pit l.rcg Ix%icki and %sNwialce PI i< <br /> August 2018 D-3 <br />