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Rifle ,;ravel Pit 41 A,ig;.i3t 2021 <br /> 5.0 Exhibit D - Mining Plan <br /> Rule 6.4.4 outlines the requirements for Exhibit D as described below. This section is <br /> organized to recognize the mining methods, earthmoving, and size of the areas associated <br /> with the unique phases and stages of mining. <br /> 5.1 Project Location and Information <br /> The proposed Rifle Gravel Pit#1 parcel is 58.7acres along CR 346 (1-70 North Frontage <br /> Road) which begins at Mamm Creek Road on the west and ends in a cul-de-sac <br /> approximately 2.1 miles east of Mamm Creek Road. Approximately 0.5 miles east of Mamm <br /> Creek Road, CR 346 turns from a paved 2-lane roadway to a gravel two-lane roadway and <br /> remains gravel to the cul-de-sac at its east terminus. The proposed access driveway to the <br /> site is located 1.1 miles east of Mamm Creek Road on the north side of CR 346 (1-70 North <br /> Frontage Road), see Exhibit Al, Figure 1 and Exhibit B, Figure 3. <br /> 5.2 Mine Facilities and Operation <br /> The site (Stage 1 and Stage 2) has approximately 1 million tons of minable material that will <br /> be extracted over 6 years in 4 primary phases. The phases are as follows: <br /> • Site development and grading (Phase 1) <br /> • Mining preparation (Phase 2) <br /> • Mining extraction (Phase 3—in two stages limited to non-wetland areas) <br /> • Reclamation (Phase 4) <br /> Gravel and sand will be the primary and secondary commodities that will be <br /> mined/extracted. These materials will support various projects. <br /> 5.2.1 Site Development and Grading (Phase 1) <br /> This section describes the mining methods, earthmoving, all water diversions and <br /> impoundments, and size of the areas to be worked during Phase 1. <br /> 6.2.1.1 Mining Methods and Earthmoving <br /> No mining will occur during Phase 1. This phase of the project will include minor site grading <br /> and vegetation removal of the Stage 1 and dewatering pipeline areas of the Affected Area, <br /> installation and revegetation of the 12" dewatering pipeline, installation of at least one and <br /> up to three dewatering wells, and construction of the site access/driveway. See Section <br /> 5.2.1.3 for additional information regarding the pit dewatering and well activities. <br /> The existing topsoil will be stripped and used for the required berms along the perimeter of <br /> the site. These berms will be place inside of a 25-foot set back area from the property line. <br /> These berms will be roughly 5-feet in height and 23-feet wide at the bottom and will help <br /> control noise during operation. The topsoil stripped during the installation of the dewatering <br /> pipeline will be replaced immediately following the placement of the pipe. <br /> Size of Area Worked <br /> The size of area involved with this Phase is 19 acres (see Table 1). <br /> 18 <br />