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<br />i fl j Bonestroo
<br />-~,......--Rosene \I Anderlik&
<br />1 \11 Associates
<br />Engineers & Architects
<br />June 21, 1993
<br />Ms. Jeanne A. Mabusth,
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<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
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<br />We have reviewed the soil boring logs and construction details for the proposed concrete
<br />modular block retaining wall on Robert Owens' property. The proposal is to constrnct a
<br />two tier wall with 3:1 (horizontal to vertical) intermediate slopes and geogrid restraints.
<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 wall is feasible from an engineering
<br />st.tndpoint.
<br />Due to the marginal soils in the area (some clayey silt), close construction supervision is
<br />recommended to insure adequate compaction of the embankments. The soil should be
<br />placed at near optimum moisture conditions. This may require that moisture correction
<br />techniques be used if the soils are overly wet or, very unlikely, dry.
<br />Please contact me at this office if you have r1ny questions regarding tl1is matter.
<br />Yours very truly,
<br />BONESTROO, ROSENE, ANDERLIK & ASSOCIATES, INC.
<br />~>1 J>.~,1
<br />Shawn D. Gustafson, P.E.
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