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Chapter 910 Shoreland Overlay District Shoreland Alterations <br />Page 910-6 <br />be evaluated to determine how extensively the proposed activity would affect the <br />following functional qualities of the wetland*: <br />(1) Sediment and pollutant trapping and retention; <br />(2) Storage of surface runoff to prevent or reduce flood damage; <br />(3) Fish and wildlife habitat; <br /> (4) Recreational use; <br />(5) Shoreline or bank stabilization; and <br />(6) Noteworthiness, including special qualities such as historic significance, <br />critical habitat for endangered plants and animals, or others. <br />* This evaluation must also include a determination of whether the <br />wetland alteration being proposed requires permits, reviews, or <br />approvals by other local, state, or federal agencies such as a <br />watershed district, the Minnesota Department of Natural Resources, <br />or the United States Army Corps of Engineers. The applicant will be <br />so advised. <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 Statutes, 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.