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Page 2 <br /> Mr, Eric Scott <br /> December 26,2016 <br /> Pit)and maintain the historic gradients and water levels in the vicinity of the Site likely due to the direct influence of the <br /> adjacent South Platte River and Dry Creek drainages. <br /> The wells show very little change as a result of the Heit and Koenig Gravel mine's slurry wall. The <br /> area is bound on the west by Little Dry a Creek and the East by the South Platte. Discussion with <br /> neighbor(s)indicate that the area requires very little irrigation to support alfalfa and pasture <br /> grasses. Also the proposed mine was once a tree farm and has seen no negative effect from the <br /> Heit and Koenig slung walls directly to the south. <br /> - The wildlife corridors will be preserved and there is no proposal to mine these areas. <br /> - Traffic will increase briefly and a traffic study has been performed showing the Weld County Road <br /> 25 can handle the traffic. It should be noted that the Heit Gravel Mine will be complete in 2 years <br /> and the Keonig Gravel Mine is currently being reclaimed. The NCC Gravel Mine will also be <br /> complete in 2 years. These changes will significantly reduce the overall traffic as the proposed <br /> Gravel mine comes on line. <br /> - The miner will do their best to keep dust to minimum per their required permits. <br /> - The miner will enforce their best management practices and will require trucks to obey speed limits <br /> and City traffic codes. <br /> - The operator will work with City on operation times. <br /> - The access point will be restricted to the south entrance off of the paved road section along Road <br /> 25 and no heavy truck traffic will head north on Road 25's dirt portion. <br /> - The miner supports the reduction of the speed limit from 55 miles per hour to 35 miles per hour. <br /> - The operator will work with all neighbors concerning berms and planting trees to act as barriers. <br /> - The operator will work with City on operation times. <br /> - The operator will work diligently to finish as quickly as possible. <br /> - As discussed above the groundwater regime has not significantly changed with the direct <br /> installation of two slurry walls to the south. The area contains a high groundwater table as shown <br /> above in the groundwater water levels observed over the past months and from years ago. <br /> - The surrounding gravel operations have discharged water in Little Dry Creek with very little effect <br /> on the downstream topography. The creek has the capacity to safely convey 100 cfs within its <br /> banks north of the mine and the miner proposes to discharge a maximum of 1 cfs. This discharge <br /> will only be for excess"in pit water control"as the site will be slurry lined. The discharge to Little <br /> Dry Creek will only occur during mining of the west side of the site. The proposed mine will be <br /> excavated resulting in: 1)a reduction of tributary drainage to Little Dry Creek as the water is being <br /> used for pit activities covered under a substitute supply plan and contained onsite and 2)the <br /> excavated pits are required to safely convey storm flows via spillways and will assist in flood <br /> control when the pits are empty as a certain volume of flood water will enter the pit and not proceed <br /> downstream in large flood events. <br />