4.1. PCSR 12-22-2020 - Laserfiche WebLink

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material will ultimately be crushed and blended with various aggregate products for use in road improvements projects. The Company anticipates that approximately 1.2M tons of sand and gravel will be processed from these areas in 2021. Two front-end loaders will excavate material from the working face. The average depth of excavation will be approximately 50 feet. The depth of topsoil and overburden is approximately 3 to 15 feet. The processes and practices for the facility will remain the same as in the past several years. Once extracted, the aggregate is transported to the processing plant via conveyor, where it is crushed, washed, sorted by size and stockpiled until it is transported off-site. No explosives are used at this location. The traffic generated by the mining operation will continue at roughly the same volume as the past several years and includes aggregate trucks leaving the facility via 213th Avenue and then proceeding onto Highway 169. Erosion and runoff is controlled during the mining process by the excavation itself The excavation is sloped towards the interior of the property, causing runoff and any potential erosion to flow towards the center and floor of the mine. Dust is controlled by the ambient moisture content of the aggregate deposit itself, which is a very effective suppressant of airborne dust. In addition, the mine floor and internal haul roads will be sprayed with water, as necessary, to further reduce dust. Chloride may also be applied to the internal haul roads from time to time. The Elk River Plant is currently permitted to mine, process and sell product at the site and to maintain equipment 24 hours a day, as long as the operations do not constitute a nuisance to surrounding properties as determiner) by City staff. In May 2020, the City received a noise complaint which was attributed to noise coming from the"cone" crusher at the Elk River facility. Company representatives met with City staff member, Amanda Erickson, and several neighbors immediately and subsequently implemented noise suppression measures around the "cone" crusher to reduce the noise. Concerns and inquiries regarding the operations at this site can be directed to Tim Fenstermacher, Plant Manager, at (701) 866-4674 or Patty Bestler, Regional Manager, Environmental & Land Services, at (612) 214-8577. Aggregate Industries is committed to quality in all aspects of its mining and other business operations. This includes compatibility with its neighbors and responsible, involved corporate citizenship. Aggregate Industries maintains an"open door"policy at all times. The Company presently operates the Elk River facility under the following environmental permits: NMM General Air Permit 03 7003 52-00 1(issued by the MPGA) Aboveground Storage Tank Licenses(issued by MPCA) Hazardous Waste License(issued by the MPCA) MNG490073 General NPDES Permit(issued by the MPCA) Water Appropriation Permit 1988-3054(issued by the MN DNR) 3