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An Expansion of Soil Engineering; Services, Inc <br />IINNEAPILIS/ST. ►AUL I= S. County Rd.18, ► 0. Buff 35108, Mph_ Ms. SS4351012.541 ON <br />ORTHERII NINNESOTA 3211 E. IhbAruffuu, Hibbing, Me. 55141 121I.263-INS <br />August 31, 1977 <br />George Jackson & Associates <br />Suite 1760 Shelard Tower <br />Minneapolis, MN S5426 <br />Attn: Mr. Bob Tyler <br />Mr. Tyler: <br />Braun' <br />ENGINEERING TESTING <br />S ffeau�. [ . <br />w A:A11:.M. Vn. h.. gor.rwnr <br />C G . .'IS[ P [ . Va. P_ f.yn....ry <br />Re: 77-423 PRELIMINARY SOIL BORING <br />PERCOLATION TESTS <br />Proposed Subdivision <br />S.E. Corner of Watertown <br />Road & Willow <br />Orono, Minnesota <br />As requested, we have recently conducted a preliminary soils <br />investigation consisting of 8 power auger borings and 16 <br />percolation tests. These borings were taken to determine <br />general soil and water conditions over the above referenced <br />subdivision. The percolation tests were conducted to pro- <br />vide preliminary information relative to the soil absorptivity <br />rates. The borings and percolation tests were taken at the <br />locations as shown on the attached sketch. Field locations <br />were determined by you and our crew chief as determined by <br />topographical features as shown on the topographical survey <br />provided by you. Surface elevations were interpolated from <br />the contour elevations shown on this same survey. <br />1NVESTIGATION METHODS: <br />Power auger borings were completed using a CME-45 truck - <br />mounted power auger unit. The soil classifications and <br />depths as shown on the attached logs were inferred from the <br />soils brought to the surface by the continuous flight feature <br />of the auger and are thus somewhat approximate, <br />Mineral soils encountered in the borings were classified in <br />accordance with the Unified Soils Classification System. A <br />copy of that chart is attached. Representative sampples of <br />the soils brought to the surface by the auger will be retained <br />in this office for a period of 60 days to be available for <br />your examination. <br />CONSULTING ENGINEERSIMLS AND MATERIALS <br />.ne.r,nna@ hifnrt bon of Consliu[Iton • Mala,-el Test, <br />