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Lino Lakes 81st Street November 4, 2023 <br />Project #: 22538.23.MNT Page - 4 <br />________________________________________________________________________________________________________ <br /> M I N N E S O T A IOWA W I S C O N S I N <br />indicating they were very loose to loose but mostly loose. <br />A key to descriptors used to qualify the relative density of soil (such as soft, stiff, loose, and dense) can be <br />found on the Legend to Soil Description in the Appendix. <br />B.3. Groundwater Data <br />During drilling, the drillers may note the presence of moisture on the sampler, in the cuttings, or in the <br />borehole itself. These findings are reported on the Log of Boring sheets. Because water levels vary with <br />weather, time of year, and other factors, the presence or lack of water during exploration is subject to <br />interpretation and is not always conclusive. <br />Water was observed at a depth of 10 feet in the deepest boring, which was also the boring at the lowest <br />ground surface elevation. This depth corresponds to the elevation of 897 feet on the datum used to locate <br />the borings. Groundwater levels at the site are expected to fluctuate seasonally similar to levels in the <br />nearby lake, as well as with local weather patterns. <br />C. Project Design Data <br />Each structure has a different loading configuration and intensity, different grades, and different structural <br />and performance tolerances. Therefore, the geotechnical exploration will be construed differently from one <br />structure to another. If the initial structure should change design, we should be engaged to review these <br />conditions with respect to the prevailing soil conditions. Without the opportunity to review any such changes, <br />the recommendations may no longer be valid or appropriate. <br />The project consists of complete reconstruction of pavements and the installation of watermain, storm <br />sewer and sanitary sewer in the subdivision. CVT assumes the pipes will be installed at depths between 5 <br />and 10 feet using open cut excavations or direction drilling. <br />We have assumed final grades will be at or close to the existing grades. The new pavement is expected <br />to consist of asphalt over aggregate base. <br />D.Utility Recommendations <br />D.1. Groundwater/De-watering <br />As mentioned earlier, water was only observed in the boring with the lowest elevation, at a depth of 10 <br />feet. If water is encountered during the excavation, well-points or dewatering wells will likely be <br />required. <br />D.2. Trench Sidewalls <br />The contractor will be required to slope or shore the excavations as needed to meet OSHA requirements <br />for safety. Most of the soils would be expected to classify as Type C soils as defined by OSHA. Trench <br />boxes or other stabilization methods may be necessary if excavations encroach near existing utilities or <br />structures.