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BONESTROO AND ASSOCIATES ^ 612 6361311 09/19/96 07:50 0 :01/03 NO:08A <br />^ J Bonestroo <br />Rosene <br />Anderlik & <br />Associates <br />Engineers & Architects <br />SeptcmN;r 19. 1996 <br />Mr. Michael P. Gaffron, <br />Asm. Building and Zoning Adnuni.strator <br />Ciiy ol Orono <br />Post Office Box 66 <br />Crs'stal Bay, Minnesota 55.123 <br />Rc: Albcc Estate <br />File No. 139-gen <br />Dear Mike. <br />if.M. t 4. ^ *• * I •». *.., .%. { . • \ . r. : <br />t I ,| , f , • <br />• I If* * .er I f • I ‘ *•! ♦*: • <br />»• I tl* . . • s • • • <br />* .> A V I. •.» f-. » »•, • f- A \l lliM.l, <br />’• k lit l'. I ‘ 1 ^ . • f •%,.,# % I .1, »‘f « > I li* fl. If, «!• I»f • <br />. II * ..r.l A r f • ’ • I t I . • .!• I • T| • r .• • • I ■ I « I • • M .«k A f. Ml.. Ml <br />^ mf f «>i * t • I. I t I .1 r. , , »• 4, .1. <br />••I- • « • I I I I • i". a „ • . I • ' .1 I , <br />Ml • M k I l» <br />• I* I ». R.*» h, 11 H • I • I ’.s Mf, • Vi- 41 •• I <br />« « <br />E <br />Hill • . • , , <br />We have reviewed the grading plan prepared by Coffin & Gronberg fi>r the AIbce residence. The <br />property is iiKuted on Long Lake Boulevard overlooking Long Lake. We have several comments <br />in regards to engineering mutters. <br />The two ,3-foot tall retaining walls are proposed to control up to 8-fcel of fill to be placed on the <br />existing slope. The wall a.s shown appears to he acceptable from an engineering standpHjint. <br />However, more information must be provided to identify the specific wall material, type of fill and <br />the whether any type of lie-hack resiniints will be used If a hliKk wall is pr»>posed, each block <br />manufacturer has specific design charts that may be used depending on the type of fill and loading <br />conditions. The two walls must be placed at least as fur apart us they arc tall (1:1) or a surcharge <br />loading must he used. If a boulder wall is proposed, the si/e of the boulders, wall batter and <br />embedment dimensions must be specified. <br />The drainage plan shows directing the storm runoff directly over the two walls. Some type of <br />dramtile or storm sewer piping may be needed to prevent problems. Gutters and downspouts should <br />be considered to reduce the amount of runoff at the top of the wall. <br />Please cimlact me at this office if you have any questions regarding ihis mailer. <br />Yours very truly, <br />BONi:.STROO, ROSENE. ANDERLIK & ASSOCIATES. INC. <br />Shawn D. Gustafson. P.E. <br />2335 West Highway 36 • St. Paul. MN 55II3-389B • 612-636-4600