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Except for localized jobs, traffic through Elk River associated <br /> with this operation shall be limited to TH 10 and TH 169. Haul <br /> trucks shall not be allowed to make right turns into 225th Avenue <br /> when exiting the property per CU-09-14 (10.A). See attached <br /> Haul Route Through City map. <br /> (8)The plan of operation, including processing, if any, the nature of the processing <br /> and equipment, location of the processing plant, source of water, disposal of <br /> water, reuse of water, and use of explosives. <br /> Mining/processing gravel includes the use of portable aggregate <br /> crushing equipment, screens, feeder, stacking conveyors, loaders <br /> and additional equipment needed at the time of processing. <br /> Knife River has been approved to mine into the water table and <br /> maintains a DNR Water Appropriations permit allowing withdrawal <br /> of up to 2.1 million gallons of water per year for sand and gravel <br /> washing activities. A recycling pond system is used to recycle wash <br /> water. This water is not discharged but allowed to infiltrate in <br /> accordance with MPCA NPDES/SDS Permit MNG490003. <br /> Knife River does not use explosives in our operations. <br /> See Mining Operations Plan for location of processing equipment. <br /> (9)Plans for drainage, wind and water erosion control, sedimentation and dust <br /> control, maintenance of security on the proposed extraction site, control of <br /> access to open extraction and control of weeds and unsightly vegetation. <br /> As part of our NPDES (stormwater)permit, all potential erosion <br /> will be managed through the construction of berms, including <br /> establishing vegetation on them with minimal disturbance of <br /> existing vegetation outside of the limits of operation. All drainage <br /> flows to the interior of the pit and infiltrates. <br /> Haul roads will be watered and if necessary, calcium chloride will be <br /> placed. Entrance on to 225th street will be swept if necessary. <br /> The access road to the pit is gated and locked when not attended. <br /> Berms and setbacks from public roads aid in securing the site. <br /> Knife River's weed control plan includes mechanical control <br /> methods to manage unwanted plant species. If needed chemical <br /> herbicides are used. <br /> Page 7 <br /> P:1Environment\MINNESOTA\Property-Owned\Ernie Toth1P&Z\E Toth Mining Expansion IUP Application 2020.docx <br />