Laserfiche WebLink
43 <br />MINNESOTA RULES 6115.0216 <br />History: 27 SR 529 <br />Published Electronically: June 11, 2008 <br />6115.0216 SPECIFIC STANDARDS; RESTORATION. <br />Subpart 1. In general. In addition to compliance with the general standards in part 6115.0215, <br />subparts 2 to 5, specific requirements apply to the activities described in subparts 2 to 6. <br />Subp. 2. Riprap shore protection. The protection of shoreline from continued erosion by <br />placement of natural rock riprap along the shore shall be approved if: <br />A. the riprap materials are of sufficient size, quality, and thickness to withstand ice and <br />wave action. The riprap must be placed with a minimum amount of space between the larger <br />materials and the space between them must be filled with firmly seated smaller rocks or gabion <br />baskets to procure a uniform surface; <br />B. the site soils are capable of supporting riprap and a filter consisting of well -graded gravel, <br />crushed stone, or fabric is installed to prevent undercutting of the riprap; <br />C. when site conditions warrant, the toe end of the riprap is installed in a trench excavated <br />into the bed of the public water to anchor the riprap from ice and wave action, with all excavated <br />materials either used to back fill behind the riprap or removed from the bed of the public water; <br />D. the encroachment into the water is the minimum amount necessary to provide protection <br />and does not unduly interfere with the flow of water; and <br />E. adequate engineering studies are done to certify the adequacy of the design of the riprap <br />project, if deemed necessary by the area hydrologist. <br />Subp. 3. Bioengineering projects. The grading or filling of materials below the ordinary high <br />water level to facilitate the installation or use of willow wattles, willow posts, brush mattressing, <br />brush layering, fiber roll breakwaters, plant carpets, root wads, and other natural materials for <br />erosion protection and shoreline zone restoration purposes shall be approved if: <br />A. the methods and materials used are designed in consultation with department or local <br />government staff experienced in the use of such materials; <br />B. excavation and fill placement needed in conjunction with bioengineering projects are <br />minimized and are subject to all requirements related to fill and excavation in parts 6115.0190, <br />6115.0191, 6115.0200, and 6115.0201; and <br />C. a separate aquatic plant management permit is obtained whenever the project involves <br />planting aquatic plants other than willow and dogwood. <br />Subp. 4. Structural erosion control projects. Installation of rock gabions, A j acks, cable <br />concrete, bendway weirs, interlocking concrete blocks, eddy rocks, deflectors, gravel riffles, or <br />other structural methods of erosion control or bank stabilization shall be approved if: <br />Copyright © 2019 by the Revisor of Statutes, State of Minnesota. All Rights Reserved. <br />