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wm■ ■ O' - •-«mx'‘■W>:::r-^^ •■itiii:v%:XL:■ •^'■' v!->BCHOSLL B MAD80N, INCMr. Mike Gaffron -2-III. 100-Year Frequency Storm Design: <br />A. <br />B. <br />C. <br />D. <br />E. <br />>1te <br />in and <br />May 3. 1989 <br />Precipitation - 6.0 Inches <br />Peak Inflow to Basin - 18.0 cfs <br />Peak Outflow to South - 10.2 cfs <br />Mater Level in Basin 976.36 <br />Maximum Volume of Mater Detained in Basin - 19,166 cubic feet <br />Mike, please note that the proposed detention basin will alter the existing <br />site drainage patterns. The effect of this change could cause damage to the <br />existing tree stand, resulting in a future stand of “dead and unhealthy" trees. <br />Presently, there is field evidence that the existing stand of trees is located <br />in a low, wet area and that during intense storms, standing water may be <br />present. However, it would be very difficult, nearly impossible, to predict the <br />future effects that the proposed basin will have on those trees. <br />grading and drainage <br />included on the <br />•y the City. Prior to <br />ta and discovered a <br />'easible spot to <br />'rom continually <br />ich a manner that <br />year return <br />trees, the detention <br />ted by Glen Cook. Me <br />lution to your <br />If you have any questions or comments, please feel free to give me a call. <br />Very truly yours, <br />SCHOEUL & MADSON, iNC. <br />John Karwacki, P.E. <br />1-55 Tabular PliiiisJii <br />JRK/Cj <br />end. <br />cc: Ron Lauer <br />3,000 cubic feet <br />JYER <br />•• : v- ;^ <br />Mail <br />-"X <br />'4‘ <br />■ <br />■' X'' <br />m <br />mms:. <br />pKiv? <br />.fifeai- v:ri*l-IlP <br />■t . :■ . <br />^ ‘r-r-f <br />‘" ■ '■ <br />mmmm <br />vt <br />& 'i-X <br />‘ ^ A- *:•: •• •’* • <br />s' ;■-■mxim <br />¥mm