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Wattenberg Lakes Amendment, Exhibit D—Mining Plan May 2023 <br /> the permit boundary. Setbacks from man-made structures not owned by Holcim or the City of Westminster will be <br /> established at twice the pit depth unless an agreement is obtained from the property owner or engineering slope <br /> stability analyses performed. <br /> Items owned by Holcim or the City of Westminster located within the proposed permit boundary, such as roads, <br /> fences, water wells and associated pumps, and structures including a house and outbuildings, may be removed <br /> or relocated during the mining process. There are additional structures on the site not owned by Holcim or the <br /> City of Westminster(see the Pre-Mining/Mining Plan Map, Exhibit C). The structures in the overall site include oil <br /> and gas wells and associated facilities and power transmission lines. Mining and reclamation activities will avoid <br /> these structures (see Exhibit S, Permanent Man-Made Structures within 200 Feet of the Affected Land). <br /> Prior to mining under the 2004 permit, there were oil and gas wells and flowlines in parts of the site, but none of <br /> these remain in the small areas to be mined and where grading for reclamation is planned. Previously, a well <br /> located within the Pond 1 footprint (within mining Area 1) was plugged and abandoned, thus allowing the full area <br /> of Pond 1 to be constructed for water storage. <br /> 6.0 ROADS AND CONVEYORS <br /> Preparation for mining will include constructing 15-ft-wide gravel access roads as needed. These gravel roads are <br /> included in the permitted acreage and will be removed and reclaimed after mining. <br /> All the aggregate material will be transported via conveyor from the mining area to Holcim's Platte Valley Plant to <br /> the east for processing. The conveyor is set on concrete blocks or frames. The main conveyor line comes from <br /> the south and currently crosses the Pond 1 area (will be relocated to go around the west side of Pond 1 area), <br /> then continues along the north side of Pond 1 following its current alignment to the east side of the permit area. <br /> The conveyor will continue to be operated for future permitted mining in areas to the south of the Wattenberg <br /> permit area. <br /> A 10.5-ft wide existing road that currently connects to WCR 23 3/4 will be utilized to provide street access to this <br /> site. The location of this existing road is shown on Exhibit C, Pre-Mining Plan. <br /> OTETRA TECH Page 4 1 4 <br />