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S�p l7 21 01 :07p LSamstadltascaEngineering [9521445-2106 F <br /> �� . ��� �����. <br /> � September I8, 2006 <br /> ITASCA ENGINEERING, Ix+ <br /> 1342 TENTH AVENUE EA: <br /> SHAKOPEE, MN 55379-29� <br /> 952-445-79! <br /> Troy Swanson <br /> 3Q40 Casco Point Road <br /> �rono, MN 55391 <br /> Re: Retaining Wall Replaceinent, South Side of Lot, 3040 Casco Point Road, Orono, M] <br /> Dear'Troy:: <br /> In my visit to yuur residence at the above address, we discussed the following items relative to tt <br /> replacement of a limestone retaining w€:!t close to your neighbor. <br /> • Remove old retaining wall. <br /> • Lse large boulders, 3 to 4+ feet in average dianieter at base. <br /> • Set first row of bouiders at least t foot below the existing(finished)ground surfac;e. <br /> • Slope face of boulders 5°back from vertical. <br /> * Irnmediately beliind boulders,place durable f lter clot��to release any water build-ap beiund wall. <br /> � Fill and tamp behind filter cloth with clean coarse sand ar fine gravel. <br /> • Place perforated plastic drain with sock behind lawest course of boulders and daylight towar� <br /> street in a bed of coarse gravel to allow drainage for the gravel behind the wall. <br /> • Refer to sketches attached. <br /> I cvnsider that the work done according to this ptan will provide stability to a reta.ining wall that could b� <br /> 10 feet in tota!height, <br /> i hereby certify that this report has been prepared by me ar under my direct supervision and tha <br /> I am a duiy registered Professiona! Civil Engineer under the laws of the State of Minnesota. I <br /> you have any further questions or if I can be of any further assistance, please do not hesitate to phone o: <br /> write. <br /> Suicerety, <br /> iTASCA ENGiNEERING, Inc./;.4�,�CE �• S� <br /> � ,� <br /> � , <br /> -c� _ 'S�� � _ — <br /> � ` <br /> + ,;,.��t. fONAI 1' <br /> I.awrence E. Samstad,P.E., v� ngisi�8l�li�d�n e ,�No. 6220 <br /> �� r��• Llc'.�L �� , <br /> Encl: Brief Resume ��,'� �,�, h�,��t�5a <br />