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r- f A.( ITEM 5.2. ( Memorandum ilk of Elk/1' River TO: PLANNING COMMISSION FROM: STEPHEN ROHLF, BUILDING & ZONING ADMINISTRATOR DATE: MARCH 24, 1998 S 12, SUBJECT: MINERAL EXCAVATION BY CAMAS MINNESOTA, INC. CU 98-5 Request CAMAS Minnesota, Inc. (Shiely Company) is requesting a conditional use permit for mineral excavation to mine sand and gravel from a 5.85 acre site in Section 10, Township 33, Range 26, Sherburne County, Minnesota. A complete legal description and vicinity map is included in CAMAS' application attached to this memo. The property in question is zoned ME - Mineral Excavation Overlay District and the underlying zoning is A- 1/Agricultual. The property is proposed to be mined to an average depth of 15 feet over an estimated five years period. The phasing plan in the attached application shows the mining proceeding from south to north, however, the operator may start the mine in the north. The city's normal hours of operation for mineral excavation(7:00 a.m. to 7:00 p.m.) are proposed. Screening and crushing the product is also proposed on the site, but no washing operation. Elk River Bituminous will be doing the actual mining as a subcontractor to CAMAS. The product mined will be used in Elk River Bituminous' hot mix plant located on a parcel adjacent to the mining. CAMAS is the owner of the mine site. Review • Wetlands - The proposed fifty foot buffer from the mining activities to the wetlands on the property should suffice to ensure the wetlands are not affected. As indicated in CAMAS' attached application,the exact boundaries of the wetlands need to be delineated, when weather permits. The contours on the Final Topography included in the application show run-off from the mining area being directed toward a ponding area in a previous excavation. This drainage plan should not deprive the natural ponds of water to a point that it will affect their water levels. Ground water in the location of the proposal is estimated to be at a depth of 940 to 945 feet above mean sea level, which is far below the proposed mining limits. s:\b&z\stever\camascup.doc 13065 Orono Parkway • P.O. Box 490 • Elk River, MN 55330 •TDD &Phone: (612) 441-7420 • Fax: (612) 441-7425