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• •~ ~- ~- ~ v w r= i. 1 n C L 9 M S A <br />March 20, 1995 <br />File: 230-2670 <br />fO1Sl1TI1C IGCIBERS <br />1326 Energy Park Dri.e Mr, Steve Rohlf <br />s. Poi, ntrt ss~os Building and Zoning Administrator <br />612.644~43a4 City Of Elk R1Vef <br />~~eoo-eee•ts23 13065 Orono Pazkway <br />Fac 611.6449446 P.O. Box 490 <br /> Elk River, MN 55330 <br />8T PAUL <br />RE: NORTHERN CON-AGG, INC., GRAVEL. MINING PERMTT REQUEST <br />Dear Mt. Rohlf: <br />P _ 0 2 <br />As requested, we have reviewed the submittal package from Northern Con-Agg, Inc., <br />regazding their application for a conditional use permit for a mining. operation. Based on <br />their submittal package and our review, we would offer the following wmments: <br />OhlflaGwEEAiNG 1. It appears from their estimates that the mining operation is expected to last <br />f""a°"MfMU approximately 15 yeas at an annual rate of 400,000 tons per year. <br />IAl <br />"~ 2. The site has direct access onto TH 169. There are existing turn lanes and <br />50iD W"s'f acceleration lanes which provide for reasonable access fot mining operation onto <br />sraucruRU and off of the trunk highway. The site could access directly onto County Road 77 <br />suA~Erir,~ on the south of the property, However, the submittal indicates that the vast <br />TRAETIC majority of the traffic is expected to leave via the highway either north or south. <br />TRMrSFORTATiON <br />EIECTRKAE/M£CMArJKAE 3. Available information indicates that the water table at the site is expected to be a[ <br />f,+cRxERarc: approximately elevation 945. The Plan of Operation indicates that mining is <br />rtvAc expected to approximately elevation 955. This would leave an estimated 10 foot <br />rowERERSA~euna+ separation between the bottom of the mining and the expected ground water <br />sv°A elevation. <br />SYSTEM CONTROLS <br />4. The Plan of Operation indicates that material will be crushed and washed at the site. <br />Since an existing mining operation currently operates here, there already is a DNR <br />Water Appropriation Permit in place which monitors the use of ground water for <br />the washing operation. <br />5. The final Reclamaton Plan indicates a bottom elevation of approximately 955. The <br />highway on the east side is in the range of approximately 975 at the lowest point to <br />approximately elevation 1,009 at the southeast comer. Therefore, the property will <br />•ES ir+: slope up to the existing highway elevations. The Reclamation Plan shows existing <br />,uw~rrous elevations in the range of 1035 on the south, west, and north of the site. Phis <br />PRIOA LAKE indicates a slope at 4:1 of approximately 75 feet in vertical elevation. This will be <br />St. PAUL <br />