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EXHIBIT D MINING PLAN The information for this section is intended to satisfy the requirements outlined in Section 6.4.4 of the Colorado Mined Land Reclamation Board's Construction Material Rules and Regulations. A. Background The purpose of this application is to obtain authorization for Hall-Irwin Corporation (Hall-Irwin) to mine, process and sell sand and gravel and to operate concrete, recycling and asphalt batch plants at the Water Resources, LLC property. Hall-Irwin will mine approximately 87 acres of a +125.88-acre parcel located near Greeley, Colorado. Please see the attached Mining Plan Map for the specific location of the area to be mined. B. Operational Methods a. Description of mining method: The applicant will begin mining at the east side of the property and proceed west through the site in phases to minimize the amount of land disturbed at any one time. The site will basically be mined beginning on the northern most half of the site mining phases I and 2 from west to east. Phases 3-6 are in the southern and western portions of the site and will be mined east to west, starting at the point furthest from the processing area and working toward it. Please refer to the Mining Plan Map for details on the phasing order. Site preparation Initial disturbance of the property will include: • The slurry wall will be constructed around the perimeter of the mining area. • The perimeter berms will be installed along Weld County Road (WCR) 58. The applicant will plant grass along the berm to help screen the site. The berms are designed to allow historic drainage and flood waters to pass through the site unobstructed. • The area adjacent to the intersection will include signage for the facility. Once mining is complete, the signage will be removed and the entrance will serve as access to the water storage reservoirs. • The overburden material from Phase 1 will be used to fill the processing area above the 100-year floodplain to allow historic flood drainage to pass through the site and around the processing equipment without impacting the processing equipment. Proposed Mining Process for Each Section Before any mining commences, the operator will install a dewatering trench around the mining area. This water will be pumped into the existing irrigation ditch located along the northern edge of the property. The applicant will obtain Hall-Irwin Corporation Page 14 of 35 MLRB 112 Permit Application