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04021 Banks and Gesso. LLC Exhibit D -Mining Plan Coordinated Activities with PerN Pit ~M-1990-0981 Asphalt Paving Company seeks to replace its sand and gravel reserves, as material at the existing Perry Pit operation will likely be mined out within the next three to six years. The applicant proposes to move the processing plants from the Perry Pit site to Wattenberg West within the last year or two of Perry Pit's production, and truck approximately 225,000 tons of pit run from Perry to Wattenberg West for processing. Mining at Wattenberg West will not commence until reserves at Perry Pit are depleted. Mining Methods All phases will be dewatered and dry mined. A slurry wall will be constructed to the Office of the State Engineer's specifications around Phases 2 and 3 prior to commencement of mining below the water table. The slurry wall will isolate the mine areas from the surrounding groundwater regime and allow for dry mining with minimal impact to the neighboring groundwater hydrology. Phase 1 will not be enclosed by a slurry wall, instead it will be dewatered and dry-mined and then backfilled and reclaimed to approximate original grade. Mining operations will include topsoil and overburden stripping, and excavation of dewatering trenches, sedimentation ponds and sump areas. Raw materials will be excavated with excavators, front-end loaders, scrapers and/or bulldozers. As areas are cleared and stripped, previously mined slopes will receive backfill material to establish the permanent design side slopes. Earthmoving Operations Stripped topsoil will be stockpiled on the western edges of the property (as shown on Exhibit C-3) for later use in reclamation. Topsoil and overburden stripped from subsequent mine areas may be placed directly, to near final grade, in previous mine areas being concurrently reclaimed. Mining within each phase will begin once topsoil and overburden have been removed from that phase area. Excavated materials (pit run) will be removed via front-end loaders, and may be loaded onto a field conveyor and transported back to the processing plant, or loaded into off-road haul trucks for transport to the plant site. Mined slopes will range from vertical to 0.5:1. As soon as mining limits have been reached in one phase area, reclamation of the pit edges within that phase area will begin. This will allow for concurrent backfilling of the pit perimeter with previously stripped overburden and/or material stripped from the next phase area to be mined. Phasing Plan The applicant proposes to mine approximately 95 acres of this site in three phases. Asphalt Paving Company October 1 t, 2005 Wattenberg West Sand and Gravel Mine Page 8