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EXHIBIT D MINING PLAN <br /> The property boundary has been surveyed on site and the permit area will be surveyed prior to <br /> any site disturbance. Exhibit C contains all mining plan maps. <br /> The gravel zone is approximately 30 feet thick in an alluvial deposit and is overlain by soil <br /> ranging from 0-44 inches and overburden ranging from 0-16 inches. The gravel is recent <br /> alluvium of the Quaternary Age, in the old floodplain of the Yampa River. The bedrock <br /> underlying the gravel is Lewis Shale. Mining will occur to the top of the shale since there are no <br /> known issues with selenium in the Lewis Shale. <br /> 1. Mining Methods and Earthmoving <br /> Operations at Bunn Ranch Pit consist of excavation of sand and gravel for processing into <br /> construction materials products. Processing facilities can be found in the central portion of the <br /> site, extending from the site entrance southwards to the Yampa River. These processing facilities <br /> include plants for crushing, screening, washing of rack, asphalt production, and concrete <br /> production. Stockpiles of material for processing and sale are also located in this processing area. <br /> At the site entrance is an office building, a truck scale, and scale house. Mining will be <br /> conducted via loader, dozer, and haul truck. <br /> Mining will progress through the site from west to east. The topsoil and overburden from a new <br /> area will be used to reclaim the previous area. This will reduce material moving as well as reduce <br /> the maximum area to be reclaimed. Any fines from the crushing/screening operation will also be <br /> salvaged and used in the reclamation. <br /> No more than 1500' of highwall requiring backfilling will be in place at any time. Mining slopes <br /> will be to 2H:1 V. <br /> 2. Water Diversion and Impoundments <br /> No impoundments of water are within the Bunn Ranch Pit. Numerous unsealed groundwater <br /> lakes can be found where mining has been completed. During mining of an active pit, dewatering <br /> is conducted to create a dry mining area. This dewatering is conducted using pumps located <br /> Bunn Ranch Pit <br /> D-1 <br /> January 2021 � c.�t�kxx aed ns�ccace,e�.t c <br />