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rIS!, Page 2 of 11 <br />Mr. Jared Ebert <br />January 20, 2010 <br />3. On Page D-4 of the Exhibit, it states mining and reclamation activities will take <br />approximately 20 years. Please provide a more detailed schedule for the mining <br />activities. Please estimate the periods of time which will be required for each phase <br />(1-5) of the operation. The Division understands this schedule will be an estimate <br />and will vary depending on economic activities. <br />An estimated schedule by phase has been added to page 4 of Exhibit D. <br />4. What will be the maximum depth of the pit excavation for each phase? <br />The maximum depth of mining for each phase will be to the shale floor and will vary <br />by phase. The shale generally slopes from north to south through the mining area <br />and is generally shallower within the flood plain. Average depth to shale for each <br />phase is as follows: <br />Phase IA: 28' <br />Phase I B: 16' <br />Phase I C: 13%' <br />Phase 2: 24' <br />Phase 3: 14' <br />Phase 4A: 14' <br />Phase 4B: 14%' <br />Phase 4C: 13%' <br />Phase 5A - 5C: 14' <br />Shale floor contours are indicated on Exhibit C. <br />5. What seed mix will be used to stabilize the topsoil and overburden piles if they are <br />left in place for longer than 180 days as described on page D3 of the mining plan? <br />The Seed Mix for Upland Areas will be used on these piles. Exhibit D, page D3 has <br />been revised to clarify this. <br />6. The structures to be built in the plant site are depicted on the mining plan map with <br />their respective length and widths labeled. Please provide an estimate for the height <br />and composition of each of those structures (i.e. office, scale house, MCC building, <br />maintenance shop, etc...). Also, if these structures will be built on concrete pads, <br />what will be the thickness of the pads? The Division needs this information to <br />calculate a cost for removing these structures for the Financial Warranty. <br />Most structures at the plant site will be portable and not be constructed on a concrete <br />pad. The maintenance shop will be on a 12 "thick concrete pad and be 25' tall. The <br />MCC building will be a portable van trailer that is about 12' tall (no concrete pad). <br />The office and scale house will also both be about 12' tall and each building will <br />probably sit on approximately ten 12 "x12 "x8' concrete piers. <br />7. Please provide an estimate of the thickness of the asphalt road constructed in the plant <br />area. <br />The asphalt road in the plant site area will be approximately 4 "- 6" thick.