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2 <br /> p.oNg:(612)70641299 <br /> Fat:(612)70&8202 <br /> 29 ANTNQNY LAME SOU111 � rrWW'PM*WQ.0" <br /> ttE 100 <br /> Awt1ONY,(M�-40MA 36419-3277 �,1 l:!:�t]�.N'�', <br /> pwo.ih;t"r t•:�(;l\Ia�:t21 .� \t.\. <br /> t:MON1E[R! • <br /> AN��r6T! 6GlN1f01� Ef,uCATOPs <br /> December 5, 2000 <br /> Todd Irvine <br /> Keenan& Sveiven <br /> 15600 Wayzata Boulevard,Suite 4106 <br /> Wayzata, MN 55391 <br /> 11111111111 1111111111, <br /> Re: PEM Project 074003 3020 Watertown Road, Orono <br /> Dear Todd: <br /> you requested, we have examined the stone gravity rztaining structure at the above- <br /> Asreferenced address.The purpose of my examination was to collect information needed to <br /> analyze the structure for stability. <br /> The structure is a stone%mvity retaining wall with a maximum height of 5' 8". The <br /> highest portion of the wall has four courses of boulders, each boulder weighing <br /> approximately 500 pounds. The back face of the boulder wall is lined with a filter fabric <br /> to reduce erosion of the grdnular backfUl through the wall face. <br /> of the highest <br /> theion of <br /> topof the <br /> the wall,we measured approximately 2' .8"batter from he <br /> wall, corresponding to a 25-degree angle from vertical. <br /> Based on our analyses, the structure has safety factors of.2.3 against overturning,and 1,5 <br /> against sliding along its base. These safety factors meet professional engineering <br /> standards for this type of construction. <br /> Please call if we can provide further assistance. <br /> Sincerely, <br /> PROJECT ENGINEERING & MANAGEMENT. INC. <br /> Chris Arlaudson,P.E. <br /> Vice President thereby certify that this report wits prepared by me or under my direct <br /> tie., <br /> s(on and that l am a duly regluered Profes!jional Engineer under <br /> he laws of t S to;fM1I1Znota. <br /> -. igned: <br /> ter - <br /> innesota Registration Number:26806 <br /> Z0 39Vd N3AI3AS (INV NVN33M L9919Lb 60:91 000Z/50/ZT <br />