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property <br />atlon District to comment on his <br />ng the heavy rains of July of this <br />r: 1) aesthetic considerations, 2) <br />ence. <br />:ies of plants would present the <br />ind users of the lake. The use of <br />easons. Mr. Waldron's proposal <br />lis is the best remedy to alleviate <br />ntioned below are satisfied. <br />he effects of urban and suburban <br />loney has been spent toward that <br />:k between the filtering effect of <br />>sion of physical and chemical <br />threshold is whether the surface <br />singly small percentage of land <br />ansport of solids and dissolved <br />nsport of dissolved substances by <br />a positive step in dealing with <br />y to the lake, ne has avoided all <br />iverted to the streets or even his <br />ess of this system to prevent <br />fill thereby remove most of the <br />Minnesota 55343 Telephone (612) 544-8572 <br />'''' ' i . -.p-. <br />rnsmm v#' <br />'xm <br />jjr ,solution, given the state of knowledge, is to choose the most aesthetically pleasing desit^u that avoids an increase in impervious surfaces.Mr Waldron's proposal also includes a deck that would be instiled at *1*®the first floor. ^S>^ld improve the surface runoff situation W ^ <br />Sf“o?y ”nf.ll much as .reel do, Houwr. it is importsm that the «ea under the <br />deck not 1^ paved or made impervitHis. <br />3. Prevention of Recurrence <br />recurrence. This can be done Iw installing subsurface drams, controlling surface <br />runo^ and avoiding retaining walls where possible. <br />fail just abwe the level of the lake. With this support removed, the rest of the slope <br />quickly failed. <br />The most important step to prevent recurrence is to regrade the slope to a gradc^ <br />steeper than*50%, revegetate, and install subsurface drains at the bottom of the <br />slope. The drains will prevent excessive ground water pressure. <br />arerwhete hno longer h«''the enelw w'erode or ^e opportunity to entiain other <br />materisds. ^her landscaping can be done to avoid the channeling of flow. <br />__..^11.. ♦/% lonHc/^nma nrnhlerniL not drSlin^lSLC plTOblCinS. <br />that are caused Dv grounu waicr couuiuuiuj auiuiai <br />Retaining walls are a solution to landscaping problems, not ^^^inage problei^ <br />Subsurface drains must be placed behind all retaining walls and the walls must be <br />properly designed. <br />4. Summary <br />quality problems. <br />K;: -l': <br />m \ : ;; . i’i.sVr <br />!. '•!. ■•.If <br />mm <br />.*/■ <br />SBRSte-iK'v <br />m&Kmrnm <br />mmm <br />mrnmn■..i. <br />iii; <br />mm <br />1 <br />'4 <br />■.'V M