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AET #20-02044 - Page 3 <br /> <br />above grade construction will be wood-framed. The development will also include installation of <br />major underground utilities and bituminous surfaced roads and driveways. <br /> <br />Foundation Design Assumptions <br /> <br />Our spread foundation design assumptions include a minimum factor of safety of 3 with respect <br />to a shear or base failure of the foundations. We assume the structure will be able to tolerate total <br />settlements of up to 1 ", and differential settlements over a 30' distance of up to 1/~,,. <br /> <br />The presented project information represents our understanding of the proposed construction. This information <br />is an integral pan of our engineering review. It is important that you contact us if there are changes from that <br />described so that we can evaluate whether changes in our recommendations are appropriate. <br /> <br /> SITE CONDITIONS <br /> <br />Surface Observations <br /> <br />The site is located east of Twin Lakes Road at about Tyler Street NW in Elk River, Minnesota. <br />The site is mostly rolling agricultural land with several wetlands scattered over the site. The <br />northern and eastern parts of the site are wooded and generally not accessible to soil boring <br />equipment. The site topography plan indicates the surface elevations range from about 908 to <br />about 945. Surface elevations at the boring locations range from 908.2 at Boring #11 to 944.9 at <br />Boring #2. <br /> <br />Subsurface Soils/Geology <br /> <br />Logs of the test borings are included in Appendix A. The logs contain information concerning soil <br />layering, soil classification, geologic description, and moisture. Relative density or consistency <br />is also noted, which is based on the standard penetration resistance (N-value). <br /> <br />The boring logs only indicate the subsurface conditions at the sampled locations. Variations often occur between <br />and beyond borings. <br /> <br /> <br />