06-13-1977 Council Minutes - Laserfiche WebLink

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� , ' ' Page 13 BARR ENGINEERING CO. CONSULTING HYDRAULIC ENGINEERS � DOUGL/15 W.BARR 6E00 FRANCE AV ENUE SOUTH )OMN D.OICNSOH MINNEAFOLIS,MINNESOTA 55�]S L.R.MOLSATMER TELEPHONE�AREA612�920-0635 ALLANGEBHARD LnwnENCE W.GUBBE � LEONARD l_KREMER DEMNIS E.�P.LMER WARREN W.HANSON June 8, 1977 Mr. Robert DeGregory 2713 Kelly Avenue Excelsior, Minnesota 55331 Dear P4r. DeGregory: On Thursday, June 2, at your request, I attended a meeting of your neighborhood association for the purpose of reviewing the presentation cf an aluminum sheeting system which has been proposed for rehabilitation of � the boat lagoon shared by the members of the association. The purpose of � the letter is to review the information presented at that meeting and to transmit the conclusions and recommendations which can be drawn from that information. � The proposed system consists of aluminum sheeting which would be driven into the bottom of the lagoon on the water side of the existing timber retain- ing wall. The sheeting would be tied back to anchors consisting of aluminum sheets buried in the bank of the lagoon. The anchors would be coupled to the sheeting by means of aluminum tie rods which would pass through slots cut in the existing timber sheeting. The presentation of the aluminum sheeting system was conducted by Mr. Robert Trees, a representative of Kaiser Aluminum & Chemical Sales, Inc. Mr. Trees' presentation included many slides depicting similar aluminum � sheeting systems which have been installed in other states. The slides illus- trated several techniques which have been successfully used for installation � of the sheeting and the finished appearance of the aluminum system at num- erous sites. Mr. Trees also had several brochures describing the system � and the computer program used by Kaiser for the design of the system. Apparently, Braun Engineering and Testing, Inc. were retained to make four soil borings in the vicinity of the lagoon to explore the subsurface conditions and determine the soil properties to be utilized in the design of the system. Mr. Trees indicated that the four borings were carried to a depth of approximately 4-1/2 feet and that the soils at this depth consisted of silty clays with shear strengths ranging from 300 pounds per square foot to an excess of 800 pounds per square foot. The information obtained from the soil borings was apparently phoned into the office of Kaiser Aluminum & Chemical Sales, Inc. where it was utilized for the computerized design of the sheeting system presented by Mr. Trees. Mr. Trees made copies of the computer output available for review. �