Laserfiche WebLink
Rifle Gravel Pit #1 June 2021 <br /> Stage 1 of the mining extraction operation will start in the southeastern quadrant of the site, <br /> depicted in Figure 2, Exhibit B. At this location, the crusher will be placed at existing grade <br /> as excavation proceeds down to the lowest elevation of the gravel. When enough material <br /> has been excavated in Stage 1, the crusher will be moved to the mining pit floor. Stage 2 will <br /> take place in the northeastern quadrant of the property. See Figure 11, D3 for a typical <br /> location for this material during mining. <br /> Scott will also monitor the response of the delineated wetlands on the property over the <br /> course of Phase 3 to determine if the wetlands are supported entirely by agricultural water <br /> (i.e. non jurisdictional). If the wetlands are determined to be non-jurisdictional, Scott intends <br /> to submit a minor amendment to the Garfield County Land Use Change Permit to allow for <br /> expanded mining in the future. <br /> It should be noted that the dewatering pipeline on the Shideler property will already be <br /> installed and the associated disturbance will be revegetated during mining extraction. <br /> The location of the mining equipment in the bottom of the pit will support mitigation of the <br /> mining noise and dust. All stockpiling of material at this point also be done at this level and <br /> move based upon the mining activity location. <br /> 5.2.3.1 Stockpiling and Overburden Handling <br /> This phase of the project will include stockpiling of material for screening, washing and <br /> crushing processes. Figure 11, Exhibit D3 depicts the approximate location of stockpiles <br /> during mining. Equipment for this phase will include, but not be limited to, a bulldozer, track- <br /> hoe, and a 35-ton haul truck. <br /> 5.2.3.2 Water Handling and Dewatering <br /> Phase 1 dewatering activities will continue throughout this phase. Any water encountered at <br /> the bottom of the pit during this phase will be intercepted by a buried perforated pipe <br /> (estimated at three feet below the mining floor). It is assumed that any water captured in the <br /> perforated pipe will be pumped by the dewatering well. See Figure 9, Exhibit D1 for a <br /> typical mining section that shows the mining pit dewatering set-up and Figure 12 for the <br /> approximate locations of the dewatering wells. <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 /> 5.2.3.3 Schedule of Operations <br /> The Rifle Gravel Pit will operate from 7 am to 7 pm Monday through Friday, and occasional <br /> weekends, as needed. Scott will limit winter operation hours between the hours of 7 a.m. <br /> and 5 p.m. Approximately 5 employees will be on site during this phase of the mining <br /> operations. No nighttime activities are anticipated. Occasional equipment repair, or <br /> maintenance may be conducted at night, but lighting will be kept to a minimum and directed <br /> inward; the site will not have ambient lighting. <br /> 5.2.4 Reclamation (Phase 4) <br /> 23 <br />