Agenda - Public Works Committee - 03/16/2021

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Ramsey Business Park 95 Infrastructure Replacement December 9, 2020 Project #: 17624.20.MNS Page - 4 B.2. Penetration Test Results Penetration Test Results: The number of blows needed for the hammer to advance the penetration test sampler is an indicator of soil characteristics. The results tend to be more meaningful for natural mineral soils, than for fill soils. In fill soils, density tests are more meaningful. Penetration resistance values ("N" Value) of 5 to 25 blows per foot (BPF) were recorded in the fill and possible materials. The natural sands on site returned values of 5 to 12 BPF, indicating they were very loose to medium dense. A key to descriptors used to qualify the relative density of soil (such as soft, stiff loose, and dense) can be found on the Legend to Soil Description in the Appendix. B.3. Groundwater Data During drilling, the drillers may note the presence of moisture on the sampler, in the cuttings, or in the borehole itself. These findings are reported on the Logs of Boring. Because water levels vary with weather, time of year, and other factors, the presence or lack of water during exploration is subject to interpretation and is not always conclusive. Water was not observed in any of the borings. Groundwater levels at the site are expected to fluctuate seasonally similar to levels in the nearby Mississippi River and ponds, as well as with local weather patterns. C. Project Design Data Each structure has a different loading configuration and intensity, different grades, and different structural and performance tolerances. Therefore, the geotechnical exploration will be construed differently from one structure to another. If the initial structure should change design, we should be engaged to review these conditions with respect to the prevailing soil conditions. Without the opportunity to review any such changes, the recommendations may no longer be valid or appropriate. The project consists of complete reconstruction of pavements and the installation of watermain, storm sewer and sanitary sewer along McKinley St. NE, Unity St. NW., Radium St NW., and 140th Ave. NW. CVT assumes the pipes will be installed at depths between 5 and 10 feet using open cut excavations or direction drilling. We have assumed final grades will be at or close to the existing grades. The new pavement is expected to consist of asphalt over aggregate base. D. Utility Recommendations D.1. Groundwater/De-watering As mentioned earlier, water was not observed in the borings. If water is encountered during the MINNESOTA IOWA WISCONSIN