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<br /> <br />Bear Creek Quarry (M-1977-344) Permit Amendment <br />Holcim US Inc, 3500 Highway 120, Florence, CO 81226 <br />Phone (719) 288-1443 www.holcim.us 48 <br />1200 tph) located in the vicinity of the shop and office building. The final product conveyed to the cement <br />plant will be approximately 4.5-inch minus. Conveyor belts leaving RCQ will be equipped with a gamma- <br />metrics cross belt analyzer system to provide real-time chemical analysis of the material transported to the <br />plant. <br />2.4.6 Blasting Operations <br />Blasting will occur daily, Monday thru Friday, to yield limestone volumes that provide sufficient quantities <br />of overburden and produce limestone quantities to support plant production. Blasting will conform with <br />Bureau of Alcohol Tobacco, Firearms and Explosives regulations and monitored for seismic control as <br />described in the Blasting Plan (Appendix 4.1). Blasting is performed by a blasting contractor, licensed in <br />CO. At distances of 5,000 feet or greater, the peak particle acceleration will not exceed 1.00 in/sec2. The <br />nearest structure is the Minnequa Canal located within 500 feet of the permit boundary but more than two <br />miles from Sections 24 and 25 in Fremont County. At this distance, ground vibration will not exceed 1.00 <br />in/sec2 thus having no negative impacts to existing structures. <br />2.4.7 Existing Structures <br />Existing structures within the affected area boundary include ranch fences, cattle watering infrastructure <br />and electricity transmission lines. Ranch fences will be removed that are within the affected area. The <br />cattle watering infrastructure, water pipe and troughs, will be dismantled and removed from the affected <br />area. The water supply line to the cattle troughs will be capped at the permit boundary. Holcim will <br />maintain a 25-foot radius setback from electricity transmission lines on the native ground elevation. In the <br />quarry, the top mine bench will be setback 25 feet from the base of the pole with setback in the quarry <br />floor up to 165 feet due to 1H:1V bench slope. <br />2.4.8 Water Diversions or Impoundments <br />Water diversions and impoundments are not anticipated. In the event groundwater is encountered, it will <br />routed toward Red Creek and ultimately discharge into the Arkansas River. <br />