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tunn city ummiq <br />~~�•• 662 CROMWELL AVENUE <br />ST PAUL MN 55114 <br />PHONE 612/6453601 <br />OBSERVATIONS OF PILE INSTALLATION <br />P/IOJtcT: PROP(iSED RESIDENCE <br />1635 CONCORDIA DRIVE January 16, 1989 <br />RUPOAT90 Tog - *Q, MINNESOTA 1 -Atlas Foundation Co <br />Betz Builders 1-Feyerheisen d Associates <br />Attn: Tom Betz Attn: Fran Feyerheisen <br />415 Deborah Drive <br />MAp lA Plain MinnPsnta S539Q <br />LABORATORY No. 4220 89-638 <br />This report concerns our recent observations performed during installation of driven pile <br />for support of the proposed residence at 635 Concordia Drive in Orono, Minnesota. The <br />scope of our work consisted of the following: <br />1. Perform observation of piling installation at the site on a full-time <br />basis. <br />2. Provide judgments of pile capacity, based on the Engineering News Record <br />Formula. <br />We understand the proposed residence will have overall dimensions of approximately 130+ x <br />671, and will be supported by a driver, pile foundation system consisting of 48 treated <br />timber piles. We understand these piles are designed based on a total working load <br />capacity of 27 tons per pile. <br />Prior to construction, we were provided with the results of a geotechnical exploration <br />program performed by others. The report suggested a generalized soil profile consisting <br />of topsoil and swamp deposits with interbedded layers of sand underlain by glacial till <br />soils. The report reviewed foundation alternatives and indicated a deep foundation <br />system of driven timber piles would be the most feasible. Please refer to the original <br />report for more detailed information. Due to a continuing consolidation of the swamp <br />deposits, the report also recommended reserving up to 9 tons per pile to counteract <br />potential negative load. <br />PILES AND PILE. DRIVING_EgUIEWM <br />Treated timber piles were driven at the site for support of the residence building. The <br />total length of these piles ranged from 35' to 459, with the exception of four test piles <br />ranging from 48' to 509. The piles were driven with a Link Belt Model 440 diesel hammer <br />which generates a manufacturer's rated energy of approximately 18,200 ft -lbs. Based on <br />the Engineering News Record Formula, and our past experience with similar pile types and <br />hammers, we recommended the production piles for this project be driven to the followirc <br />criteria: <br />A111 A MUTUAL 010TUCTM M rO 06l TTG MdR.c AND OCL VN. ALL M11 010TO ASM MAIMArrfO AS VM11 (.0/Ir.ODAMAL M1O n/ OP CLADKIM AMO AUTHOft- <br />ZAT,ew mm w,PucATmM OP 0TATemmor 0. 00 INRTAACTI M ON „00AOOMID OUO,YPORTO 10 M Vll0 M,MOWMO OUO MMMrr1M A0010V L <br />