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% <br />J/ J Bonestroo <br />l^osene <br />^ B Anderlik & <br />|\ \ Associates <br />Engineers & Architects <br />May 9,2000 <br />Sonestroo. Roscnt. Anderlik and Astoclatet. Inc. If an Affirmative Acilon/Equal Opportunity <br />Employer and Employee Owned <br />Principali; Otto G Bonestroo PE • Marvm i Sorvaia. PE • Giern 1 Cook. PE • <br />Robert G Scnunicnt. PE • Jerry A Bourdon. PE. <br />Senior Contultants: Robert W Rosene. P£ • Joseph C Anderlik. »E • naro E Turner. PE • <br />Susan M Eberiio. C PA. <br />Atfociate Principals: Howard A. Sanford. PE • Keith A. Gordon. PE. • Robert R. Pfcfferle. PE. • <br />Richard W Foster. PE • David O. Loskota. PE • Robeit C. Russek. A I.A • Mark A. Hanson. PE. • <br />Michael T. Rautmann. PE. • Ted K.Fleld. PE. • Kenneth P Anderson. PE • Mark R. Rolfs. PE. ^ <br />David A. Bonestroo. MBA* Sidney P Williamson. PE. LS. • Agnes M P .-g. MB A. • Allan Rick Schmidt. PE <br />Offices: St Paul. St. Cloud. Rochester arsd Wiiimar. MN • Milwaukee. Wi <br />M^bslte: WWW bonestroo com <br />Wendy Bottenberg <br />Assistant Zoning Administrator <br />City of Orono <br />Post Office Box 66 <br />Crystal Bay. MN 55323 <br />Re: Rascher Retaining Wall <br />File No. 139-98-000 <br />Dear Wendy: <br />We visited the site at 4705 North Shore Drive today to review the existing site conditions. The area located <br />between the home and the lake is landscaped with various short retaining walls constructed of stone and <br />timber. Several large boulders have been placed along the shoreline. A series of stone steps provides access <br />from the home to the lake. AH existing landscaping in this area appears to have been in place for some time. <br />The entire area between the home and the lake is mostly vegetated with visual no evidence of slope instability. <br />It is our understanding that the property owner wants to install a series of retaining walls between the home <br />and the lake as shown on the plan you provided. The construction of these walls as shown on the plans would <br />require substantial regrading on the existing steep shoreline. It has been City policy to discourage the <br />construction of retaining walls along the takeshore and to encourage a natural looking frontage. Wc <br />recommend that no new retaining walls be constructed on the site between the home and die lake. It is our <br />opinion that the existing retaining walls could be repaired and restored with minimal distuibance to the exisdng <br />slope. Silt fence should be installed prior to any construction/restoration activity to minimize sediments from <br />washing into the lake. Any disturb^ areas should be revegetated immediately following construction to <br />stabilize the slope and minimize erosion. It may be necessary to use fiber blankets on any steeper disturbed <br />slopes to protect the newly seeded areas until the vegetation has been established. <br />Please contact me at (651) 604-4863 if you have any questions regarding this matter. <br />Yours very truly, <br />BONESTROO. ROSENE. ANDERLIK & ASSOCIATES. INC. <br />Tom Kellogg'^ <br />Cc: Greg Gappa, City of Orono <br />2335 West Highway 36 • St. Paul, MN 55113 • 651-636-4600 • Fax: 651-636-1311