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Rifle Gravel Pit#1 July 2023 <br /> 5.2.2 Mining Preparation (Phase 2 [P2]) <br /> This section describes the earthmoving, mining preparation and size of the areas to be <br /> worked during Phase 2. <br /> • An Operations Pad, including storage, processing, and sales facilities (scale house) <br /> will be constructed at the entrance to the project site. This Operations Pad will <br /> include areas for the material stockpile locations, loading chute and processor, the <br /> scale house, vehicle parking, and the minimal facilities needed for onsite staff <br /> (portable toilets, water tank, work trailer) (See Figure 9, Exhibit C4). The buildings <br /> on the Operations Pad will be temporary for the mining operations and will be mobile <br /> and portable. <br /> 6.2.2.1 Mining Methods and Earthmoving <br /> No mining will occur during Phase 2. The primary activities in this phase include the <br /> construction of the Operations Pad, mobilization and placement of the heavy equipment, <br /> temporary work trailer, screening and wash equipment, temporary vault-and-haul septic <br /> trailer, and potable water. <br /> This phase will also include the installation of the secondary containment structures <br /> associated with the Spill Prevention, Control, and Countermeasure requirements for fueling <br /> activities. There will be one (1) skid-mounted steel double wall fuel storage tank with a <br /> capacity of 12,000 gallons and one (1) skid-mounted steel double wall fuel storage tank with <br /> a capacity of 2,000 gallons. These tanks will have diesel fuel. Attachment A, Sheet 13 <br /> depicts the Spill Prevention Control & Containment(SPCC) Detail for these storage tanks. <br /> Figure 9, Exhibit C4 depicts the location of these storage tanks on the Operations Pad <br /> Area. Scott has an SPCC Plan that outlines the fueling and spill prevention practices. The <br /> SPCC plan commits to complying with Rule 3.1.13 in the instance of a spill. <br /> Size of Area Worked <br /> The total size of area that could be involved with this Phase is 19.00 acres. The specific <br /> areas associated with the Operations Pad include: <br /> • Operations Pad area (estimate): <br /> ■ 1.86 acres <br /> ■ 2,999 CY (import fill, CDOT Class 6, - 1 foot depth) <br /> • Processing area (screen, crush) (estimate): <br /> ■ 0.2 acres <br /> • Stockpiling area (staging for processing) (estimate): <br /> ■ 0.54 acres <br /> Equipment <br /> This phase will use conventional earth moving equipment to grade, remove vegetation and <br /> stockpile topsoil, including but not limited to a bulldozer, track-hoe, and a 35-ton haul truck. <br /> 6.2.2.2 Water Diversions and Impoundments <br /> No water diversions or additional low water crossing work will be required as part of Phase <br /> 2. <br /> 28 <br />