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Rifle. (�r,�v-J F' r #1 January 2i.123 <br /> Although not included within the Permitted Area or Affected Lands, Scott has obtained a <br /> Colorado Department of Transportation (CDOT) Access Permit (Permit No. 320024, <br /> Attachment B) that includes a plan to improve CR 346 with a hard surface from mile post <br /> 94.50 to 95.14 at the access to Rifle Pit#1. <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 /> 5.2.1.3 Water Diversions and Impoundments <br /> No water diversions will be required as part of the planned mining activities. Scott will <br /> complete minor repairs and maintenance on an existing culverted crossing of the Last <br /> Chance Ditch tailwater channel, to provide vehicle access from one side of the ditch to the <br /> other(Figure 9, Exhibit C4). The crossing is currently serviceable but not adequate for the <br /> operation of the proposed mining activity. This repair work will consist of placing additional <br /> overburden on the existing culvert, to replace material that has been eroded by previous <br /> ranch use (cattle loafing, irrigation flows, and general erosion). The crossing will be <br /> maintained at a 12-foot travel width. Maintenance activities of this nature undertaken on <br /> existing structures located on irrigation ditches are not a regulated activity under Section <br /> 404 as administered by the U.S. Army Corps of Engineers (USACE). <br /> 5.2.1.4 Water Handling, Dewatering, and Permits <br /> Scott will apply for coverage under Permit No. COR400000, Colorado Discharge Permit <br /> System (CDPS) General Permit (for) Stormwater Discharges Associated with Construction <br /> Activity at least 10 days prior to the commencement of construction activities disturbing <br /> greater than or equal to 1 acre. This permit has requirements that address water quality and <br /> stormwater management, including monitoring and reporting, and the development and <br /> implementation of a Stormwater Management Plan (SWMP). Scott will also install the <br /> erosion and sediment control BMPs as depicted in Figure 13, Exhibit D2. <br /> Scott will comply with the State Engineer Office's (SEO) rules and regulations regarding any <br /> water depletions that may also occur during mining operations from water lost with mined <br /> aggregate and water used for dust suppression. <br /> No dewatering will occur as part of the proposed wet mining operations at Rifle Pit#1. <br /> 5.2.2 Mining Preparation (Phase 2) <br /> This section describes the earthmoving and mining preparation activities to be completed <br /> during Phase 2. <br /> 5.2.2.1 Mining Methods and Earthmoving <br /> No mining will occur during Phase 2. This phase of the project will complete the minor site <br /> grading and vegetation removal of the Affected Lands and construction of the site <br /> access/driveway initiated during Phase 1, if necessary. Primary activities in this phase and <br /> include the mobilization and placement of the heavy equipment, temporary work trailer, <br /> screening and wash equipment, temporary vault-and-haul septic 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. <br /> 29 <br />