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Stabilizing Your Shoreline to Prevent Erosion Page 3 of 6 <br /> swim./roded gess es Vegetation removes water <br /> may pr aideafavarable from Mdfareasthrough <br /> habitatfmtheestadish- uptake end Nara piration <br /> merit of deeper rocked <br /> shrubs and tress <br /> r:l <br /> 'r <br /> r4 1 1 y Vege�tion slows r,S a runofF endacts as <br /> a fil ter t o caOc h <br /> •O sedment <br /> Rods hold sdl particles in place while BEACH <br /> deeper rods d woody veg dab on <br /> prevent oh pping d sal layers <br /> Figure 3: Well-established vegetation on the shore stabilizes the soil and helps remove water. <br /> Natural shoreline features provide natural protection. While swimmers may not enjoy walking on <br /> cobblestones, and an ice-pushed ridge may block some of the view from your lawn chair, these features <br /> help "nourish" your beach by reducing erosion and trapping sand. Even driftwood absorbs a certain amount <br /> of wave energy that otherwise erodes soil. <br /> Shore Protection <br /> Regardless of the natural protection on your shore, the right combination of conditions (such as high lake <br /> level and wind direction) can result in a severe wave pounding, and shoreland soil may need additional <br /> protection. <br /> Placement of large rock, usually referred to as rip-rap, is the preferred and most common form of shore <br /> protection (see Figure 4). Technical methods are available to determine rock size, placement geometry, and <br /> elevations to ensure the best protection. Your county Soil and Water Conservation District (SWCD), the MN <br /> Board of Water and Soil Resources (BWSR), and the federal Natural Resources Conservation Service <br /> (NRCS) can provide technical assistance. <br /> OVERTOPPING <br /> ppRR <br /> Of shorolina�is often <br /> owrtoppad b <br /> 'MOH LAY BR <br /> storm•a - (graded rock rip-rap) <br /> -.f•�^.l ++a 3 (typical slope) MHW <br /> "..14,711;ta...ag7 %.y I TOE �dLW <br /> G EOT EXT I LE FA BRIC 't" "� � PROTECTION <br /> AND/OR �!''t�`t:.nn^rir4�p�•�wfa <br /> •: <br /> GRADED STONE . •.: +v�fr�r ,,)) ^am; .rr <br /> ,; . <br /> FILTER v:V. <br /> Figure 4: Proper rip-rap placement (MHW=mean high water, MLW=mean low water). <br /> The above agencies will also have information on other types or remedies that may be appropriate for your <br /> particular situation. Potential shore protection alternatives include: <br /> bulkheads (retaining walls) <br /> gabions (rock-filled wire baskets) <br /> articulating blocks (cable-connected concrete blocks) <br /> Geoweb matrix (thick, open-cell plastic grid) <br /> A few of the alternatives can be placed by hand. Some other alternatives, such as railroad ties, are often <br /> tried but rarely work. If you have your own idea for a solution, you should seek technical advice first. <br /> If rip-rap is used, crushed or blasted rock locks together better than rounded boulders, but can be very <br /> expensive unless it is readily available. <br /> http://www.extension.umn.edu/distribution/naturalresources/components/DD6946g.html 4/4/2012 <br />