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<br />Slalom Course Dimensions <br /> <br />. 850 x 75 feet <br />- Boat drives down center <br />- Skier skies pendulum like arcs behind boat <br />. Example of construction-AccuSink <br />· Area usage can be minimized to 1200 feet <br />by stopping at ends and shortening rope <br />- Goose Lake (example lake Wayne suggested) <br /> <br />Other Measured Noise Levels <br /> <br />. Passing float planes: 83-87 dB <br />. Normal human conversation: 60 - 70 dB <br />· Auto Horn: 110 dB <br />. Thunder: 130 dB <br />. Urban Street: 100 dB <br /> <br />II <br /> <br />to. <br /> <br />I <br /> <br />Noise levels <br /> <br />(actual measurements) <br /> <br />· Measured noise level from shoreline with <br />boat passing by in designated slalom course <br />path (350 feet north of island): <br />- 1999 Malibu Response <br />. Hull ID: MB240104C999 <br />. Noise lovIII range = 58-63 Db (30-34 mph) <br />- 1994 Mastercraft ProStar 205 <br />. Hull ID: MBCUSDX41394 <br />. Noise lovel range =59-63 Db (30-34 mph) <br /> <br />'0 <br /> <br />Aquatic Vegetation <br /> <br />· Canadian Waterweed. Coontail. and <br />CurlyleafPondweed, are all found in <br />northern end. <br /> <br />· Minnesota ONR : A Guide to Aquatic Plants <br />- Canadian watorwoed, Coonlail <br />. 10 Managemllllt SlnllAl!lY seetIoa, i1sl1lll1s: "Remove oJI planl <br />ftlI8m.lm1I. from tho _ bowJao they can - illlO Jl$W <br />II!mllB: <br />- Coontail <br />. "Grows UD~ with no roots" <br /> <br />la <br /> <br />3 <br />