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NEWS 8~ NOTES <br />environmental impacts of-the project. <br />(MCEA's case was supported in spring of <br />2001 when high water "blew out" an ice <br />berm between the wetland into which the <br />proposed ditch would have drained, gutting <br />proponents' argument that the wetland <br />would have filtered pollutants and nutrients <br />before they could enter the lake.) <br />To support MCEA's efforts, ca11651-223- <br />5969 or email mcea@mncenter.org. <br />The Penn State study on no-wake .zones <br />A "no-wake zone" may be better than a <br />speed limit to prevent the pollution and <br />water quality problems that can occur when <br />boats stir up a lake bottom, according to a <br />Penn State study conducted by David Hill, <br />assistant professor of civil and environ- <br />mentalengineering, and Michele Beachler, <br />a master of science candidate. <br />help you plan, design, and achieve. <br />This includes the planning and design of alternative collection and <br />treatment systems: <br />~ -~ ~ Pressure sewers <br />Constructed wetlands <br />~ Recirculating sand filters <br />Package plants <br />MOLTIDISCIPLINED. <br />SINGLE SOURCE. <br />~~ <br />SHORT ELLIOTT HENDRICKSON INC. <br />1-800-325-2055 <br />www.sehinc.com <br />Stirring up of sediment on lake bottoms <br />can cause less light to get to aquatic plants, <br />affect water temperature and quality, and <br />lead to increased levels of nutrients and <br />contaminants. <br />Even at low speeds, boats can stir up sedi- <br />ment and block sunlight from reaching <br />underwater plants. According to research <br />done with ski boats, boats at very low <br />speeds and very high speeds had little <br />impact on the amount of sediment that was <br />stirred up. However, at "near plane" speeds <br />of six to eight miles per hour, there was <br />maximum potential to stir up the lake <br />bottom. There was not much impact from <br />personal watercraft in water depths greater <br />than about five feet, and little difference <br />between inboard and outboard boats. <br />Hill and Beachler hope to produce guide- <br />lines that can be used by lake managers to <br />decide what speeds can be allowed in <br />shallow parts of lakes. <br />CONDENSED FROM SCUTTLEBUTT, FEBRUARY 2002 <br />IJ 1 ' 1 1 AJ <br />~: <br />Planting erl?er~~E~' <br />vegetation such as~a r~u~13"`~'~ <br />or bulrushes m shallow vote u~nc~, _ _ <br />protects shorelines from wave erostar and <br />provides excellent habitat for fish and wildlife. <br />f ~"a. <br />Call 9521925-3359 or visit www.appliedeco.com <br />ur lakes and streams are precious <br />resources that need protection! <br />To create healthy, sustainable streambank <br />environments, Applied Ecological <br />Services, Inc. employs bioengineering <br />strategies using live plant materials as <br />eco-friendly alternatives to steeUconcrete <br />walls or rock rip-rap. The advantage: <br />these live structures grow stronger over <br />time, require less maintenance, and are <br />backed by the ecological expertise of <br />AES' on-site consulting team in the <br />Twin Cities. <br />~; • Ecological Consulting & Contracting <br />'~ • Streambank/Shoreline Restoration <br />' • Design/Build Natural Landscaping <br />• Seeding & Plant Installation <br />• Prescribed Burning & Herbiciding <br />• Brush Removal <br />Applied Ecological Services, Inc. <br />4018 w. 65th St., Ste. 15 <br />Edina, MN 55435 <br />~Y y t <br />.. <br />:~,•N~ve l.~ndscgpes <br />_design and creation by nES <br />--- _.-.__ APPLIED ECOLOGICAL <br />SERVICES, Irvc. <br />22 APRIL 2002 FOCUS on the Waters <br />