Laserfiche WebLink
k) Test pitting performed at the Koskie site shows that groundwater is deeper than approximately 15 feet;therefore, <br /> it is anticipated that no groundwater will be encountered at the site. In order to avoid exposing groundwater and <br /> to facilitate surface water drainage out of the pit,the pit excavation will not be deeper than approximately 15 <br /> feet which will be slightly higher than the bench terrace located directly east of and adjacent to the Koskie site. <br /> Weld County will ensure that groundwater is not exposed by staying a minimum oftwo feet above groundwater. <br /> According to information obtained from the State Engineer's Office, the Koskie site is not located within a <br /> designated groundwater basin. <br /> 1) It is anticipated that sand and gravel excavation, crushing, and stockpiling at the Koskie site will not disturb <br /> surface water or ground water quality. Erosion control measures(Best Management Practices)will be installed <br /> along the perimeter of disturbed areas and at the east margin of the site to protect the adjacent intermittent creek <br /> area from mined area runoff and sediment. A Colorado Department of Public Health and Environment <br /> Stormwater Construction Permit will be obtained prior to the start of mining operations. <br /> m) Any onsite generated trash will be collected in an on-site dumpster and disposed at the County landfill. No <br /> chemicals are anticipated to be utilized at the site. <br /> n) Best Management Practices, including berms, silt fencing, and straw bales erosion control measures will be <br /> installed along the east end of the Koskie site to protect the adjacent intermittent creek area from mined area <br /> runoff and sediment. Open excavations are not anticipated to be over 15 feet deep, MSHA approved open <br /> excavation and fall protection safety measures including fencing and berms will be installed as needed. During <br /> and following mining, side slopes to the pit will be graded for stability and will be re-vegetated as needed to <br /> meet the reclamation plan. <br /> o) A mobile rock crusher and screen plant will be installed in the "gravel processing" location shown on the <br /> enclosed mine plan,map(Exhibit C2)during intermittent crushing operations. It is anticipated that the crusher <br /> and other equipment will be re-located to other County-operated gravel processing sites for the majority of any <br /> year. <br /> p) No secondary commodities are anticipated to be extracted or produced at the Koskie site. No asphalt plant or <br /> concrete batch plant is planned for the Koskie site. <br /> q) Gravel and sand extracted from the Koskie site will be utilized by Weld County Public Works Department for <br /> repair and maintenance of local County roads and other County construction projects. Soils and mined materials <br /> unsuitable for road construction may be stockpiled at the site. These soil stockpiles may be utilized for <br /> excavation backfill and site reclamation on County-operated projects. This is a County-operated gravel pit;no <br /> commercial graver and sand sales are anticipated. <br /> M:\Mining\Koskie\DRMS Application\Koskie Application Exhibits 7-9-14.doc <br /> 7/9/2014 <br />