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OP OPTIONStabllsh a relative impact for <br />Lng Proper Erosion <br />tity and quality) <br />r Impact <br />2 <br />5ff Water Quantity & Quality <br />Lons, based on amount of flat <br />[mental <br />lion controls arc not in <br />*6S <br />a ' :K- '.'.Vtoning Pile #1223 Kerch •, !#••Page 7 of t <br />D) To whet degree does the project decrcese the eree of relatively <br />level ground surface that will absorb rainfall rather than allow swift <br />run-off? Staff would note that while the City's philosophy has been <br />to nasiaize the flat area in lakeshore zones for increasing the <br />absorption of rainfall and snow aelt« it is significant that the <br />reason the current erosion ot'cured was that the ground was saturated <br />and the weight of the saturated earth caused the bank to shear. The <br />Watershed District suggested to Mr. Waldron that he reduce the Mount <br />of water froa the property that would absorb into the ground by piping <br />it directly to the lake, thereby decreasing the chance for m <br />recurrence of the ground saturation. Given that the erosion that <br />occurred had a significant dctriaental impact on lake water guality. <br />(arguably a nuch greater inpact than the nornal run-off from the <br />surface over a large nunber of years), it would seen that we night <br />need to redefine and reconsider the ramifications of our current <br />philosophy as it impacts properties such as this one. <br />Sunnary - <br />A. Prom a short-term environmental and lake water quality impact <br />standpoint, applicant's revised proposal is not significantly better <br />or worse than most of the methods proposed, because the impacts can be <br />minimized through the use of proper erosion control methods during the <br />grading and revegetation process. <br />B. From a long term environmental lake water quality standpoint, once <br />the area is revegetated th«.re will be no significant impact on the <br />lake water quality relative to other options. <br />C. From the standpoint of slope stability, the proposed method will <br />make the slope somewhat more stable than if the bank was merely <br />regraded to its original contours, but may not be as stable as it <br />could be if some type of interior structural stabiliser (such as <br />cribbing or fabric layering) were employed. <br />D. From the standpoint of visual impact, the revised proposal will <br />have less of an Impact than the original deep walk-out cut proposal. <br />Topographically, a 3' cut will likely l>e less distinct from across the <br />lake than the 6-8' cut originally proposed, and depending on the <br />degree of vegetation established, could be relatively unobtrusive <br />compared to methods that use retaining walls. <br />■ ' ■ ■ y <br />. * •• • ■ ■-* ^ <br />% ■ ^ <br />V.. • •• I ■ ; > <br />•■y • W-y-"’y <br />,••■■■■ •' . -I. .-J <br />mu <br />■ ..............................' <br />, :y.;. ^--.vyr <br />* <br />■■■ • -v- - A.;:;y. <br />.•>' .. V <br />'V; : V: : <br />■ T.- ■■■■ . ;••••: I ■; ■ <br />m <br />\ <br />■ ” V, ’ • ‘. <br />-i;. A ;y ; <br />:• . y '■ ■■■■*' <br />ir^it <br />%MmM