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IfTsr M. Inspection and Maintenance. All storm water management faci'Iities shall be designed to minimize the need of maintenance, to provide access for maintenance purposes and to be structurally sound. All stormwater management facilities shall have a plan of operation and maintenance that assures continued effective removal of pollutants carried in storm water runoff. The Director of Public Works, or designated representative, shall inspect all storm water management facilities during construction, during <br />the first year of operation, and at least once every <br />years thereafter. The inspection records will be kept on file <br />at the Public Works Department for a period of six years. It <br />shall be the responsibility of the applicant to obtain any <br />necessary easements or other property interests to allow <br />access to the storm water management facilities for inspection <br />and maintenance purposes. <br />N. Models/Methodologies/Computations. <br />Hydrologic models and design methodologies used for the <br />determination of runoff and analysis of storm water management <br />structures shall be approved by the City Engineer. Plans, <br />specification and computations for storm water management <br />facilities submitted for review shall be sealed and signed by <br />a j^0qistered professional engineer. All computations sha <br />appear on the plans submitted for review, unless otherwise <br />approved by the City Engineer. <br />O. Watershed Management Plans/Groundwater <br />Management Plans. Stormwater management plans shall be <br />consistent with adopted watershed management plans and <br />qroundwater management plans prepared in accordance wit <br />Minnesota Statutes Section 103B.231 and 103B.255 respectively, <br />and as approved by the Minnesota Board of Water and Soil <br />Resources in accordance with state law. <br />p. Easements. If a storm water management <br />plan involves direction of some or all runoff off of the site, <br />it shall be the responsibility of the applicant to obtain <br />adjacent property owners any necessary easements or other <br />property interests concerning flowage of water. <br />Subd. 9. Lawn Fertilizer Regulations. <br />A. Use of Impervious Surfaces. No person <br />shall apply fertilizer to or deposit grass clippings, leaves, <br />or other vegetative materials on impervious surfaces, or <br />within storm water drainage systems, natural drainageways, <br />lakes, wetlands, or within wetland buffer areas. <br />B, Unimproved Land Areas. Except for <br />driveways, sidewalks, patios, areas occupied by structures or <br />areas which have been improved by landscaping, all areas shall <br />be covered by plants or vegetative growth.