Laserfiche WebLink
Sonestro_o, Ro_sene, Andedik r, Associates, Inc. <br />2335 W. Trunk Highway 36 Engineers 3 Architects <br />St. Pouf, MN 55113 <br />612-636.4600 <br />October 13, 1987 <br />City of Or(,no <br />Box 66 <br />CrvRtal Bay, NN 55323 <br />Attn: Mr. John Gerhardson <br />Re: File No. 13934 <br />1400dhill Avenue Street Improvements <br />(Dear John, <br />flan i, fewnu,w, P. <br />R.Ln d N. "., P l <br />J...l'A ( 4..*114. P L <br />R.wl)wd A 1,.6.8 P L <br />R.. A.•dl I--, Pl <br />I~ ( (A— P l <br />(.I... R C,+.. P 1 <br />A -A 4 lam. J..+. P I <br />R,Au J M i.... I1 <br />).A.—kI. P! <br />fAwr/J ( Qop.d. P I <br />LrrA A R..•Jw P E <br />MwA A 1h+.w. I l <br />I.J A /.NJ P; <br />A(. AMI I RY.Iq.+. Il <br />R.M.1 M P/Hl.•r I•! <br />W-1 U L.dc1.. 1, 1. <br />IA.. W ft'e" ... P l <br />M..A-1 CC LlA1A P/ <br />A .... L Y J•o P ! <br />J.— R Al.r+e P l <br />A,.—.* P Awdr+uw P / <br />A. A A Iw A.r w. P / <br />M..A R R.1/., P I- <br />R.aw, ( RA.u.I. A 1 4 <br />16J.r1 E Ayr., f l <br />1, ..,( 1 ►w.+/. . i <br />( A.I . A I,.A.— <br />i — Al /k..W , <br />II..A.. A/ (NA <br />sw" M lA..l.. <br />We have obtained boil borings on the WrwoAhill Avenue Street Improvement Proi- <br />ect. The sail borings indicate up to lq feet of organic soils in some areas. <br />There are three options for constructing the street as outlined in th,- soils <br />(port. The street could be surcharged t�, remove the potential fort ,ittnifi- <br />cant settlemenL in the future. The organic material could be 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 doe, not anpe-ir to be it irnble ns it wo•.Ild 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 add S75,000 to the project cost. <br />Construction of the street on the existing, embankment would seen to he the <br />most ,iesirabte alternative. The existing, roadway appears to `+e w,"te stable <br />over tt,is area. We would not antis pate anv significant change in stnbil.ity <br />3s a result of the construction. <br />We would anticiT)AtO some settlement in the street over A period of veara. The <br />rural df,it,n oction through the low area vi11 mininiZe the maintenance prob- <br />lems for the Citv. This new soilr infor-:iation will tenuire a change in the <br />-iii¢n¢ent from that proposed in the prel;minnry report. Vt, wer,- originally <br />planning to widen the roadway to the n.irth. we would now recommenA that the <br />new construction he centered on the existins• rr1.u!wav through the low area. <br />tie project costs could be increased by In percent as A result of aAditional <br />tree removal and restoration work. <br />if you have anv questions, please contact thi4 office. <br />Yours very truly, <br />g0!IFSTR(%n, Rr)SFNF., A01DERLIK i ASSOCIATFS, Irr. <br />ve� <br />e'r-�.A <br />Glenn R <br />rRC:li <br />7711e <br />