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4. Limiting night hauling is an important consideration for compatibility to the rural residential <br />population in the area. <br />Dust Associated with Truck Traffic on CR 120N <br />Relevant reports provided by GCC include Trinity Consultants January 29, 2016 (Attachment 17) <br />response to public comment McVehil-Monnett Report on air quality dated December 15, 2015. <br />(Attachment 30) <br />Dust is a concern in two areas (1) in the mine and (2) along the applicant's chosen haul route. GCC <br />manages dust in the mine by rigorous application of water (as mentioned earlier). Dust within the mine is <br />regulated by other agencies, due to its potential impact upon employees; and no offsite impacts from the <br />mining operation itself have been identified. The GCC parking areas are reported to be treated with a dust <br />retardant, such as Mag -Chloride. Based on La Plata County Land Use Code, the parking area is required <br />to be paved. <br />Dust along the applicant's chosen haul route is most effectively mitigated by use of pavement along the <br />route/roadway (Phase I of proposed RIA); and is also the most frequently cited source of "dust" concern <br />by the public. In summer and autumn of 2015 there were numerous complaints regarding dust on the road <br />and impact to adjacent homes. Responsively, the County worked with the applicant to address this issue, <br />including offering and providing water and mag chloride treatments on a regular basis to help suppress <br />dust from the high volume/loaded haul truck traffic along north CR 120. Additional mitigation <br />contemplated included that the applicant provide a sampling and monitoring plan, as outlined in Trinity <br />Consultants' January 29, 2016 report. <br />Late Hours of Hauling Operations on north CR 120 <br />The mine operates 24 hours a day with three shifts a day. As the mine is secluded by topography, <br />however, late mining hours are not anticipated to create disturbances. <br />In contrast, limiting night hauling is an important consideration for compatibility to the rural residential <br />population in the area. The County and GCC have found common ground on mitigation measures such as <br />limiting 80% of hauling between 6 am and l Opm and truck speed limits, although the absence of limits on <br />truck volumes as discussed above under Compatibility Section A, render the project incompatible. <br />C. The development will not create adverse or unsightly views for neighbors and/ or the traveling public. <br />The mining facility is located approximately 1,000' up a drainage area to Hay Gulch, and not visible from <br />CR 120 nor adjacent properties. The facility is not anticipated to cause adverse or unsightly views. Truck <br />hauling, while disruptive in a number of ways has not been identified as a negative impact from properties <br />with homes further from the roadway, specifically relative to views. <br />Also, see discussion regarding buffering on Page 23 above with respect to visual impact of truck traffic. <br />D. The development will not cause pollution of ground or surface waters. <br />Relevant reports provided by GCC within the CDS Analytical Data Submittal, May 8, 2014 (prepared for <br />a multi -agency request) includes: <br />1. CDS Environmental Services, Well Testing Results, May -November 2013 <br />2. Norwest Corporation Hydro Study, February 11, 2014 <br />3. Resource Hydrogeologic Services, Water Balance Study, May 8, 2014 (with Executive <br />Summary added July 20, 2015) <br />Project No. 2012-0089 PC <br />4852-5627-2942, v. 3 <br />Page 24 of 32 <br />(DM, VS, DP) <br />