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RCA Attachment A <br />679 D. Using sediment traps, vegetated buffer strips or other appropriate techniques; <br />680 E. Stabilizing altered areas to acceptable erosion control standards consistent with the <br />681 field office technical guides of the soil and water conservation district; <br />682 F.Not placing fill or excavated material in a manner that creates unstable slopes. Plans <br />683 to place fill or excavated material on steep slopes must be reviewed by qualified <br />684 professionals for continued slope stability and must not create finished slopes of 30 <br />685 percent or greater; <br />686 G. Fill or excavated material must not be placed in bluff impact zones; <br />687 H. Any alterations below the ordinary high water level of public waters must first be <br />688 authorized by the commissioner under Minnesota Statutes, Section 103G; <br />689 I. Alterations of topography are only allowed if they are accessory to permitted or <br />690 conditional uses and do not adversely affect adjacent or nearby properties; and <br />691 J. Placement of natural rock riprap, including associated grading of the shoreline and <br />692 placement of a filter blanket, is permitted if: <br />693 a. the finished slope does not exceed three feet horizontal to one-foot vertical; <br />694 b. the landward extent of the riprap is within ten feet of the ordinary high water <br />695 level; and <br />696 c. the height of the riprap above the ordinary high water level does not exceed three <br />697 feet (see Figure 1012-9). <br />698 Figure 1012-9: Riprap Guidelines <br />699 d. Connections to public waters. Excavations to connect boat slips, canals, lagoons, and harbors <br />700 to public waters require a public waters permit and must comply with Minnesota Rules, <br />701 Chapter 6115. <br />Page 24 of 32 <br /> <br />