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ESTON <br /> CONCRETE INC. <br /> Exhibit D: Mining Plan <br /> Langston Concrete Inc. does not intend to change the existing approved mining plan already in <br /> place with the DRMS. Piling overburden off the permitted property has not changed our focus on <br /> the mining plan. The overburden is still to be used for reclamation activities once screening <br /> operations have subsided at the pit. <br /> In regard to the land in question of which Langston Concrete Inc. has affected area beyond the <br /> approved permit boundaries, Langston Concrete Inc. intends to treat this land the same as the rest <br /> of the permitted area. No new mining techniques will occur. There is no desire to reinvent the <br /> wheel when it comes to harvesting material out of the pit. <br /> Technically speaking, no "mining"will occur in the area. "Mining Activity" has occurred given <br /> that we have stockpiled overburden material there. But no actual mining. We intend on utilizing <br /> the area as a mining activity area rather than an actual mining area. <br /> The attached "Exhibit B Mining Plan"reflects the location of the stockpile area on the North- <br /> Western quadrant of the property. Harvestable rock/sand will be pulled out of the pit on the <br /> Eastern side of the stockpile up to the toe of the Eastern most side. Once all the harvestable <br /> material is removed/mined, the pile will be pushed into the pit area and utilized to reclaim the <br /> "high-wall" (generated from mining) at a 2:1 slope. <br /> As mentioned in the previous exhibits and in the cover letter to this amendment, we plan on <br /> adding a wash plant to the property. The expansion of a sand wash plant is an added step in the <br /> material separation process already occurring at the site, not a change. Mining will continue to <br /> occur as it has since Langston Concrete Inc. has owned the property. <br /> Washed sand will be harvested from the reject products generated from the existing screening <br /> plant operation. No "new" mining will occur. The direction of the mining sequence will not <br /> change. Nor with the extraction process. There will also not be a shift in the focus of materials <br /> harvested from the existing deposit. We are not planning on halting, altering, or modifying any <br /> of the existing mining plan. The wash plant operation will be set up further down the line in the <br /> material separation sequence. We will be modifying the `mining operation' by adding the wash <br /> plant. <br /> Adding to the existing operation will change the way the reject material is handled. Currently, all <br /> 3/4" minus product is removed from the existing screening operation and placed in locations <br /> around the mine for reclamation purposes. It is currently considered reject. We will be adding to <br /> the separation operative by pulling more marketable products from this reject material. Instead of <br /> going straight to the stockpiles for reclamation locations in the pit, we will run it through the <br /> wash plant and harvest C33 spec sand out of the reject while also creating 1/4"x 1/2 " and a 1/2 " x <br /> 3/4" clean rock. The material separated out from this additional processing (reject) will then go to <br /> the locations around the pit for reclamation purposes. <br /> 902 South Union Street Florence, Co. 81226 (719) 784-3878 Office (719) 784-1158 Fax <br />