Laserfiche WebLink
.w Otto G . Bonestroo, P.E. <br />Bonestroo Robert W. Rosene. f'E.* <br />Joseph C. Anderlik. f'E. <br />Rosene Marvin L. Sorvala. P.E. <br />■ -Richa rd E. Turner, f'E. <br />Anderlik & Glenn R. Cook, f'E. <br />lJ1 Thomas E. Noyes. P.E. <br />Associates Robert G. Schunicht. f'E . <br />Susan M. Eberlin, C.f'A. <br />*Se ni or Consultant <br />Engineers & Architects <br />June 8, 1993 <br />Ms. Jeanne A. Mabusth, <br />Building and Zoning Administrator <br />City of Orono <br />Post Office Box 66 <br />Crystal Bay, Minnesota 55323 <br />Re: Robert Owens Shoreline Repair <br />File No. 139-1838 <br />Dear Jeanne, <br />Howard A . Sanford. f'E . Michael f' Rau, P.E. Mark D . waws. f'E. <br />Keith A. Gordon, f'E. Philip J. Pyne, f'E. Miles B. Jensen. P.E. <br />Robert R. Pfefferle, P.E. Agnes M . Ring, A.I.Cf' L. Phillip Gravel Il l, f'E. <br />Richard W. Foster. P.E . Thomas W. Peterson . P.E. Karen L. Wiemeri, f'E. <br />David 0. Loskota, f'E. Michael C. Lynch , P.E. Gary D . Kristofitz. P.E. <br />Robert C. Russek , A.I.A . James R. Maland. P.E. F. Todd Foste r. P.E. <br />Jerry A . Bourdon. P.E. Jerry D . Pertzsc h. f'E . Keith R. Yapp, f'E . <br />Mark A. Hanson, f'E . Kenneth P. Anderson . f'E. D ouglas J. Benoit. P.E. <br />Michael T. Rautmann. f'E. Mark R. Rolfs, P.E. Shawn D . Gustafson, P.E . <br />Ted K. Field. f'E. Mark A. Seip, f'E. Cecilio Olivier. P.E. <br />Thomas R. An~erson, A .I.A. Gary W. Morien. f'E . Charles A. Erickson <br />Donald C. Burgardt, P.E. Daniel J. Edgerton, f'E. Leo M. Pawelsky <br />Thomas E. Angus, f'E. Allan Rick Schmidt. P.E. Harlan M . Olson <br />Ismael Martinez, P.E. Philip J. Caswell. f'E. James F. Engelhardt <br />Subsequent to our inspection last Friday, we have prepared this letter regarding the <br />proposed shoreline repair and retaining wall on Robert Owens ' property. The proposal <br />is to construct a timber retaining wall at the top of a 3:1 (horizontal to vertical) slope. <br />The previously constructed embankment was constructed at a 1:1 or 1.5 :1 slope and has <br />subsequently failed. We feel that the proposed 3:1 slopes and 4 to 6 foot wall is feasible <br />but more detailed plans will be needed. The wall will need geogrid ties or another <br />approved support system. <br />We do not recommend timber retaining walls as a permanent solution. Concrete <br />modular block retaining walls are a more permanent and expensive option that should <br />be considered for this application . <br />Please contact me at this office if you have any questions regarding this matter. <br />Yours very truly, <br />BONESTROO, ROSENE, ANDERLIK & ASSOCIATES, INC. <br />~ J).x}~ <br />Shawn D . Gustafson , P.E. I <br />2335 West Highway 36 •St.Paul, MN 55113 • 612-636-4600