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aww-.li^:.jg£ig*|g|sifes^ssii ■fjt.. --mi•• •:% <br />Sptjed MtiiiSage <br />______ <br />^c4j&£:!Wl S/OaJ <br />^ T7&^ ____ <br />r* _ <br />- ---------------------- <br />>a--' <br />n^ " ill <br />■ ::'-:^;:*v^v-:;>;;:..' = v = <br />^ • <br />41 <br />mm <br />mm <br />i <br />W,:; <br />p:i|pf'Aj3 <br />•V ^-- -.Vr ■•v;Cv:vj:^:-:^ ^ ^\:M <br />r,. :v: ^ ■■■1‘JhjSg^^ <br />^ i. •^''••:-.,* ;-:-V"-.:.,.•:.! w;v-•••:!K•v•-=^v:"■^.• v=. V :•. <br />' ^-'>-*-'i--V ■' <br />'■IPS <br />.fc^ip.-,V •■..■•;• r •.,. ,.■•wmmmrnmm mms&»‘S5. *■■■■» . • ■ y- <br />:iif::S <br />mMk <br />K P-P:'Mi;ia <br />m <br />mm <br />IWH <br />Kpji <br />mmmam <br />y-y . <br />tm p.U: ■'^ <br />r.« <br />r .;,,y¥ <br />s-' -' : ,.;:'PM <br />tii^- A. V <br />•rr <br />::r-i- ;.. f.V <br />■ <br />gv:. <br />:;.:vP-;^4f#PPP ‘ P ;. <br />^3sa rmr ■f-[ ,.-•p.V '1:- SCHOELL & MAD80N, INC.ENGINEEPS • SURVEYORS • PLANNERS <br />SOIL TESTING <br />1CSOO WAYZATA BOULEVARD • M»\JNeTONKA. MN S53A3-SA8a <br />(8ia| 946-7601 • PAX 161S) 54S-9069 <br />February 22, 1989 <br />Mr. Mike Gaffron, City Planner <br />City of Orono <br />P.O. Box 66 <br />Crystal Bay, MN 55323 <br />Subject: Lauer Homes, Inc. Site <br />Adjacent to the Wayzata <br />Country Club <br />Dear Mr. Gaffron: <br />Enclosed for your review and comment are the calculations and <br />recommendations for storm water management on the subject site. Using <br />Information gathered from a site visit, and my telephone conversation with you, <br />we are recommending that a retention area be provided on the site. This basin <br />would retain the additional storm water runoff from construction of a new home <br />and entrance drive. <br />General Design Criteria <br />A. Soil conservation service curve number methods were used to calculate <br />runoff volumes from a IDO year, 24 hour, 5.9 Inch rainfall event. <br />B. Existing and proposed site runoff volumes were calculated. The <br />difference between them Indicates the recommended storage. <br />C. Storage required: 3,000 cubic feet. <br />0. The basin would be drained by percolation Into the ground. <br />E. During extremely Intense storms, the basin will fill to capacity and <br />overflow can be expected. The overflow would represent the existing <br />runoff that now Teaves the site. The runoff from the hard surface <br />areas would remain In the basin. <br />F. Minimize construction disturbance to existing site. <br />AFF)R.^ATIVE ACTION • EQUAL OPPOHTUI^JTV EMPLOYER <br />;..a <br />W,. i-• 'S"'‘; If. . <br />4,^ <br />?v-.: <br />■mi <br />^yy ■■■ . <br />i/mp1, <br />V-r=' <br />'<•4; <br />^yy:m <br />fe>-> <br />m <br />I'*' ■ 'm <br />myym <br />i <br />mm <br />Mmm,m <br />' .♦Wm T.-i ^-'^3 <br />:l i <br />K - <br />V-5P^ifl v*-’ <br />i^yF ■ fr^AiiiWiifHm::. <br />xym--:p <br />msm^^.r-.\ 1*:.. <br />.r'. <br />"■m <br />'i f ■■:.■)mm <br />fi--* v: ■ <br />■m <br />my <br />-4 <br />VI?./;;