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Bonestroo, Rosene, Anderlik & Associates, Inc. 011oc dOw..1.40 Pf GI.wwR Cow. PE <br />-- _ Rub'. N ,CWII. /•! I. A Ad.A , /•! <br />C 1 wrrA C'. A. A.ht. Y ! T Auw.. ! Nu.r.. Y ! <br />A..d/wI A L—hA 1. P ! au owd W .' • "'. P ! <br />1,A.ro E. Tw—. P L. Rob.. (i SSA —A., P L <br />2335 W. Trunk Highway 36 Eogineers & Archi9ects l.w„ C. (x>,.w. PF M.'..w L. Sash. PE <br />St. Paul, MN 55113 J,,,yA . Rrrpro. Pf. <br />nq A. 6aurQuw, P E. <br />612.636.4600 Ara! A 11* r . P.X <br />. r-E. <br />October 13, 1987 M,.A..r T. r.. .swwrww. /. t <br />.. rJ.J/sw. r ! <br />City of Orono r�u'�w.p w�P#Wn .r. £. <br />Sox 66 Mn A. iC. LrW*, P. L. <br />Xwe. L. Arwa.Pf <br />" <br />Crystal Bay, MN 55323 It." R. 1/a4.d. P. E. <br />A.wa,A P 4wwn..w. PQ. <br />A...AA p/IAww <br />Attn: Mr. John Gerhardsoni. P P! <br />Rubrl C X—A, A I.A. <br />Re: File No. 13Q34 SA tL E. Aw,r.. PC <br />s, u.l L ra.wr. r ! <br />Weodhill. Avenue Street Improvements CA-A.A e.wL.aw <br />..o AI PI.wW, <br />llwuw AI 04uw <br />Dear John, 1w 'w !e.'l.w <br />We have obtained soil borings on the Woodhill Avenue Street Improvement Prci- <br />ect. The soil borings indicate up to 19 feet of organic soils in some areas. <br />There are three options f.,r constructing the street as outlined in the soils <br />report. The street could be surcharged to remove th-e potential f orim signifi- <br />cant settlement in the suture. The organic material. could be excavated out <br />and backfilled with granu.ar material. The street can be _:-atructed ever the <br />existing embankment with the .,se of a stabilization fabr�_. <br />The surcharZing of tl.e site d.)es not appear tr ,-e desirable as it would re- <br />ouire closing *he road for approximatci, :�rzC months. Toe excavation of the <br />organic material is a viable ziti•n but gets quite :vnc:,live. We estimate <br />that this option would add $75,000 to the project cost. <br />Construction of the street on the existing embankment would seem to be the <br />most desirable alternative. The existing roadway appears to be quite stable <br />over this area. We would not anticipate any significant chanZe in stability <br />as a result of the construction. <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 widen the roadway to the north. We would now recommend that the <br />new construction be centered on the existing roadway through the low area. <br />The project costs could be increased by 10 percent as a result of addi'ional <br />tree removal and restoration work. <br />If you have any questions, please contact this office. <br />Yours very truly, <br />BONESTROO, ROSENE, ANDERLIR 6 ASSOCIATES, INC. <br />Glenn R. Cook <br />GRC:li '�?le <br />