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Bonestroo, Rosene, Ande_ rUk & Associates, Inc. <br />Otto Raa'urw,.PI <br />GI,mm0 c-„oA Pk <br />� <br />/wy,h C Amalrrhl. Y k <br />lAwnr. ! h.:.n Pt <br />MIWI.,d A L.mb q. P k <br />2335 W. Trunk Highway 36 Engineers & Architects <br />RwRerdF Trrm'r. P! <br />m <br />J frC LXsam. P! <br />NuMr,G S. Arm. A,. Pk <br />M.r.,mk Pf <br />St. Paul, MN 55113 <br />ck,mAV c Rr,rNd,. P c <br />612- <br />Jetty A Powdum P E <br />Mark A /loam., !• k <br />October 13, 1987 <br />7.d9 !a'W. Pf <br />Mm4'f T. Rrr,wwnn. f' . <br />Nob.., R /7r//6•0" P f <br />City of Orono <br />/Atrr10 CuJwr. Pk <br />fhwmp M-. Pow. ,m, P f. <br />BOX 66 <br />Mnkvi 1)m,h. P/ <br />Crystal Bev, MN 55323 <br />A~ L *W. P! <br />A.mmrrh P AAdnwA, P k <br />Attn: Mr. John Gerhardson <br />Ar„AA MhA~n.Pt <br />A4,6 N NuI/t. P L— <br />Rob'rr ( Mrau! A I A <br />Re: File No. 13934 <br />TAwmr,! Agw.PI <br />Woodhill Avenue Street Imrruvements <br />>,�„I ►yrnr rc <br />(AWAnA f,.I„n <br />I n. AI Prr.64, <br />1(wiaAM U6wm <br />Dear John <br />.Swam Af Ltwm, <br />We have obtained soil borings on the Woodhill Avenue Street Improvement Proi- <br />ect. The soil borings indicate up to 19 feet of organic soils in some areas. <br />There are three options for constructing the street a3 outlined in the soils <br />report. The street could be surcharged to remove the potential fd"P signifi- <br />cant settlement in the future. The organic material could bc• excavated out <br />and backfilled with granular material. The street can be constructed over the <br />existing embankment with the use of a stabilization fabric. <br />The surcharging of the site does not appear to be desirable as it would re- <br />quire closing the road for approximately three months. The excavation of the <br />organic material is a viable option but gets quite expensive. We estimate <br />that this option would acid $75,000 to the project cost. <br />Construction of the street on the exlstins, embankment would see..1 to be the <br />most desirable alternative. The existing roalwav appears to be quite stable <br />over this er,-a. We would not anticipate anv sipnificant change in stability <br />as a result of f-he constr;,c.ion. <br />We would anticipate some settlement in the street over a period of years. The <br />rural design section through the low area will minimize the maintenance prob- <br />lems for the City. This new soils information will require a change in the <br />alignment from that proposed in the preliminary report. We were originally <br />planning to wiAen the roadway to the north. We would now recommend that the <br />new construction be .:entered on the existinv roadwa,! throuith the low aree. <br />The project costs could he ;ncreased by in percent as a result of additional <br />tree removal and restoration worts. <br />If you have anv queti-fns, please contact this office <br />Yours very truly. <br />EONF.STROO, ROSFNE, AWDERLIK 6 AR'ZI'CIATES, INS . <br />� - 4-4 <br />Glenn <br />GRC:Ii pile <br />