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w 04/06/00 10:06 g :02/02 NO:255l-z <br />Memo if I Bonestroo <br />SM Rosene <br />Anderflk^ <br />|\J^ AssodjRM <br />4 AfiDhMtf <br />Project Name: Snyder ’s Site Client: City of Orono <br />To: Tom Kellogg <br />From: Pt»ilip J. Caswell, P.E. <br />Fite No: 139-98-000 <br />Date: 04/04/00 <br />Re: Segmental Retaining Walt Review <br />Remarks: <br />I have reviewed the Information submitted for the proposed segmental retaining wall at the Snyder's site, <br />and have the following comments: <br />1. <br />2. <br />3. <br />4. <br />The design calculations are preliminary only, and are NOT FOR CONSTRUCTION. They also are <br />not signed by a P.E. This signature is necessary. Therefore, the information is being sent back <br />without a full review. <br />Site soils information and geotechnical recommendations are necessary. Only assumed values <br />were used for the preliminary design. Sampling (borings) must be done - particularly near the lower <br />■pond* area. I would expect that some subsoil correction will be necessary. A geotechnical <br />engineer must be involved In the design - before simply "verifying* that the in-situ site soils are as <br />expected. <br />A global stability analysis should bo conducted for at least the area near the pond. The soft soils <br />one would expect in this area, overlain by 16 feet of new fill, appear to bo highly suscoptiblo to <br />stability failure. Conditions for high water and low water should be investigated. <br />Tho site plan does not indicate where a fence or railing Is to be located. A wall of this height next to <br />traffic must have a barrier to protect vehicles and pedestrians from going over. <br />In summary, this is a significant wall - up to 26 feet in height - and requires that detailed soils information <br />be obtained and final analysis and design bo conducted by a P.E. <br />Coll mo at ext. 4766 if you have questlone. <br />Bonestroo, Rosene, Anderllk and Aesoelalee, Inc. <br />St. Paul Otflca: <br />2335 West M ghway 36 <br />St. Paul. MN65113 <br />pnona 63i.(S38-4600 <br />Fa«;69l-63«-131t <br />Mllwauka* ortica: <br />»516 Wftsi Pomi <br />Moqiion. Wl 53092 <br />P»on» 202.241.4466 <br />Far 262-24V4801 <br />Rochaatar ortlca: <br />112 7** Stmet NC <br />Rocheslar. MN 55900 <br />Phone 50r-2S2-2100 <br />Fe»: 507.282-3100 <br />Wiltmar Offica: <br />2C6 Jtn Street SW <br />Wntrar, MN 56201 <br />PDore: 320-214-9567 <br />Far 320-214 9458 <br />8L Cloud Offlca: <br />3721 Street S <br />St. Cloud. MN 56301 <br />Phone. 326 25 • -4553 <br />Fax 320 251-6252 <br />I