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Orro G •cT'Wtw <br />C <br />V.# ». ^l <br />t V'v* •'f <br />i^nn t C jO* <br />I %icwp\ ^ <br />9rCtr^. G k*V>n«.til ^ <br />Sfc-s^ V C <br />Mowbjftr ^ jrf''''ic«l <br />a Go»ann Pf <br />Mr*T t <br />9«*VM} \4 *- <br />L'jwJ C ^j'VkMa P? <br />matter C t^vir* * • <br />jprr\ ♦ •OUtOD*' »l <br />♦ •^ar«or <br />T taucmrvt <br />><j ft fe<3 ^f <br />^ Vftlpnor ^ ^ <br />Oor>«(d C fiSj^iidl <br />Tt»om« A <br />F^.i^x J Sw*«0ft) <br />S-^XP' Af <br />t\^'^ M A i C ^ <br />T*v»n#t W %w»icr <br />Mk ^ww* C 4.pni** ^£ <br />l.r^ # VIMHO <br />•«^% r Af <br />Vcm ^ Afijjnp^ Af <br />ftrnnrr* a ftmirv'T* <br />AAjfft ■ Ml At <br />ftAan A Af <br />Gjrv W Mon^ Af <br />A^ J G^vxwi A I A <br />D^n** J tjgp»TL«r Af <br />A tXft k?vn«a At <br />AP^iip J Af <br />ftftjrft O Af <br />9 rf <br />t (AfHAft> At <br />i U,*****^ Af <br />G^, I? A' ’AcAO Af <br />f '»jjdC Af <br />vx?* i VAuo ‘'S <br />J •€ <br />D Guswocw' <br />« Owtp* Af <br />Ajc* G 'Hip^JP* Af <br />jonr A Go*aA» Af <br />CAvmn A txftfon <br />M AjuwV^- <br />►%,rVjr M <br />A. ^ :.• <br />•’* S.% A .r - <br />1 Z ^'•StP <br />C '.‘ ^ ' ■ <br />_ - - .4^ <br />ifi Bonestroo <br />MLm Rosene <br />^!jSm Anderlik& <br />T\ 1 Associates <br />Engineers & Architects <br />September 9, 1994 <br />Mr. Michael P. Gaffron. <br />f\sst. Building and Zoning Adminictrator <br />City of Orono <br />Post Office B<n t>b <br />Crystal Bay. Minnesota 55323 <br />Re; Lear Residence <br />File No 139-1965 <br />Dear Mike. <br />Wc have rc\acM>,ed the proptisal to replace existing retaining walls and riprap along the shoreline of <br />Spring Park Bay on the Lear residence at 2525 Dunwvx>dy Avenue. The information submitted is <br />incomplete and unacceptable. The City should not continue a review of this application until a plan hits <br />been prepared by a Registered Engineer. Informatic>n which is critical lor this type ot project includes; <br />- type of w'all proposed <br />- method of providing drainage h^r walls <br />- method of tie-hack restraint for w'all <br />geotechnical evaluation and.br type of till proposed <br />- cross section of propt>scd wall and side slopes <br />- loading condition used tor wall design <br />- indication as to which of the existing trees will be saved <br />- description of the construction technique proposed for working around the mature trees <br />and root systems in the area <br />Wc would recommend a mi^dular mastmrv bliKk wall be used tor the improvements. There are many <br />manufacturers which provide an engineered wall system for almost any application. The wall should <br />have a draintile line installed to function properly in clay soils. . - , <br />We do not recommend gravity tvpe retaining walls, such as boulder walls, due to the ditticulty in <br />determining their effectiveness o*r durability. Wc do not recommend timber retaining walls as a <br />permanent solution. <br />Please contact me at this office if you have any questions regarding this matter. <br />Yours very truly, <br />BONESTROO, ROSENE. ANDERLIK & ASSOCIAIES. INC. <br />Shawn D. Gustafs^^n, P.E. <br />2335 West Highway 36 • St. Paul, MN 55113 • 612-636-4600