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EXHIBIT D -MINING PLAN This section follows the requirements outlined in Section G.4.4 of the Colorado Mined Land Reclamation Boards Conrtrrrction Ruler and Regulationr. A. Background The purpose of this application is to obtain authorization for Northern Colorado Constructors Inc. -Aggregate Division (NCCI) to mine, process and sell sand and gravel and to operate a concrete batch plant on property owned by NCCI. NCCI will mine approximately 73 acres of the 102 acre pazcel located at the northwest comer of the intersection of Weld County Roads 18 and 25.Please see the attached index map (Exhibit B) for the specific location of the area to be mined. B. Operational Methods a. Description of mining method: The applicant will begin mining on the north side of the mining area and proceed through the site in phases as shown on the Mining Plan Map. Upon completion of mining Phase I, the site will be mined from north to south with the processing area being at original surface until there is enough space in the pit to move the operation into the pit. Atypical section will be about 10 acres in size. Only one section or portions of two sections and the processing area will be disturbed during any phase of mining. This will minimize the amount of land disturbed at any one time. Please refer to the Mining Plan Map for details on the phasing order. Site preparation Initial disturbance of the property will include removal of topsoil from the first phase, establishing a processing area and dewatering. Proposed Mining Process for Each Section Before any mining commences, the operator will install a dewatering trench around the section to be mined. This water will be pumped and discharged into a pond on the property or into a ditch which discharges to the Platte River pursuant to a discharge permit from the Colorado Department of Public Health and the Environment (CDPHE). The site wilt comply with all CDPHE regulations including monitoring and reporting requirements for the life of the mine. After the section is dewatered, loaders and trucks will strip the topsoil and stockpile it. The overburden will ultimately be used in reclaiming and sloping the shore. When the alluvium is sufficiently dry, an excavator will place the gravel on conveyors or NCCI Mrning Proposal for the NCCI Pit #1-MLRB 112Permrt l4