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Landmark Environmental LLC <br />July 19, 2010 <br />Ms. Rebecca Haug <br />Environmental Administrator <br />City of Elk River <br />13065 Orono Parkway <br />Elk River, MN 55330 <br />RE: Tiller CUP Amendment Application, June 2011 <br />Dear Ms. Haug: <br />As you requested, Landmark Enviromnental, LLC has reviewed the Tiller CUP Amendment <br />Application. City ordinances for Mineral Excavation outline the requirements for applications in Sec. <br />42-52. <br />1. The application does not completely address the requirements of subparts (7)) (8) and (9) of <br />the ordinance related to the appropriate level of detail for tecluiical review. A basic element fot• <br />assessing site conditions acid intended activities is a detailed grading plan. This must be <br />provided by the applicant to determine compliance with ordinance requirements. <br />2. In item # 11) "Depth to Water Table", of the application, it is stated that no mining will occur <br />within the water table. The application further references an elevation of 955-957 feet MSL. A <br />map of groundwater elevation in relation to the grading plan is required to determine <br />compliance with City requirements. <br />3. The surface water management techniques proposed for the mineral excavation operation <br />must be further defined in relation to the grading plan. Locations of surface water ponding must <br />be identified to determine the suitability of the Plan of Operation. <br />4. The requirement for Topsoil Preservation (Sec. 42-96) is not adequately addressed. The Plan <br />of Operation must identify the locations of topsoil stockpiles to assist in determining <br />compliance with the ordinance requirement. <br />5. The Rehabilitation Plan, as required by Sec. 42-52, subpart (1.), relies on the approval of Elk <br />River Landfill's CUP/License Amendment Application dated February 2010. <br />I would recommend that a condition be added to require submittal of an acceptable Rehabilitation Plan <br />in the event that the Elk River Landfill's CUP/License Amendment Application is not approved. <br />Please contact me at 952 887-9601, ext. 207, if you have any questions or comments regarding this <br />review. <br />Project Engineer F:\I'ROJECTS\CER-City of Elk River\2009-07.01\Corr\Letters 2011Ut110719Haug.doc <br />2042 W. 981° Street Bloomington, Minnesota 55431 Phone: (952) 887-9601 Fax: (952) 887-9605 www.landmarkenv.com <br />