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Chapter 910 Shoreland Overlay District <br /> <br /> <br /> Page 910-10 <br />a. Grading or filling of any wetland must meet or exceed the wetland protection <br />standards under Minnesota Rules, Chapter 8420 and any other permits, reviews, <br />or approvals by other local state, or federal agencies such as watershed districts, <br />the DNR or US Army Corps of Engineers <br />b. Alterations must be designed and conducted in a manner that ensures only the <br />smallest amount of bare ground is exposed for the shortest time possible; <br />c. Mulches or similar materials must be used, where necessary, for temporary bare <br />soil coverage, and a permanent vegetation cover must be established as soon as <br />possible. <br />d. Methods to minimize soil erosion and to trap sediments before they reach any <br />surface water feature must be used; <br />e. Altered areas must be stabilized to acceptable erosion control standards <br />consistent with the field office technical guides of the local soil and water <br />conservation districts and the United States Soil Conservation Service; <br />f. Fill or excavated material must not be placed in a manner that creates an unstable <br />slope; <br />g. Plans to place fill or excavated material on steep slopes must be reviewed by <br />qualified professionals for continued slope stability and must not create finished <br />slopes of thirty (30) percent or greater; <br />h. Fill or excavated material must not be placed in bluff impacted zones; <br />i. Any alterations below the ordinary high-water level of public waters must first be <br />authorized by the Commissioner under Minnesota Statute, Chapter 103G.241; <br />j. Alterations of topography must only be allowed if they are accessory to permitted <br />or conditional uses and do not adversely affect adjacent or nearby properties; and <br />k. Placement of natural rock riprap, including associated grading of the shoreline <br />and placement of a filter blanket, is permitted if the finished slope does not <br />exceed three (3) feet horizontal to one foot vertical, the landward extent of the <br />riprap is within ten (10) feet of the ordinary high-water level, and the height of <br />the riprap above the ordinary high-water level does not exceed three (3) feet. <br /> C. Storm Water Management. <br /> The following regulations shall be applied to all land alterations in the Shoreland District, in <br />addition to the requirements of the Little Canada Stormwater Ordinance, Chapter 928: <br />1. When possible, existing natural drainage ways, wetlands, and vegetated soil surfaces <br />must be used to convey, store, filter, and retain storm water runoff before discharge to <br />public waters. <br />2. Development must be planned and conducted in a manner that will minimize the extent <br />of disturbed areas, runoff velocities, erosion potential, and reduce and delay runoff <br />volumes. Disturbed areas must be stabilized and protected as soon as possible in <br />accordance with Best Management Practices. Facilities or methods shall be used to retain <br />sediment on the site. <br />3. When development density, topographic features, and soil and vegetation conditions are <br />not sufficient to adequately handle storm water runoff using natural features and <br />vegetation, various types of constructed facilities such as diversions, settling basins, <br />skimming devices, dikes, waterways, and ponds may be used. Preference must be given