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Geotechnical Engineering Report Proposed Gravel Mine Terracon Project No. 21995030 Terracon Continuous lithologic logs of each boring were recorded by the engineering geologist during the drilling operations. At selected intervals, samples of the subsurface materials were taken by driving split- spoon samplers. Penetration resistance measurements were obtained by driving the split-spoon into the subsurface materials with a 140-pound hammer falling 30 inches. The penetration resistance value is a useful ' index in estimating the consistency, relative density or hardness of the materials encountered. Groundwater conditions were evaluated in each boring at the time of site exploration, and two days ' after the drilling. Laboratory Testing 'All samples retrieved during the field exploration were returned to the laboratory for observation by the prcject geotechnical engineer and were classified in accordance with the Unifed Seil Classification ,System described in Appendix C. At that time, the field descriptions were confirmed or modified as necessary and an applicable laboratory testing program was fcrmulated to determine engineering 'properties of the subsurface materials. Boring logs were prepared and are presented in Appendix A. Laboratory tests were conducted on selected soil samples and are presented in Appendix B. The test results wera used fci uie yecrec,hnicai engine~rir.g analyses, ane [he aeveiopment of roundation and ,earthwork recommendations. All laboratory tests were performed in general accordance with the applicable ASTM, local or other accepted standards. ,Selected soil samples were tested for the following engineering properties: t • Water Content Grain size • Plasticity Index 1 •. SITE CONDITIONS 'The site is currently split into two parcels of land by the Cache La Poudre River which flows west to east across the southern third of the property. The ground north of the river is currently cultivated, 'while the land south of the river is pasture. The northern edge of the property is located on a modestly sloped piece of ground that climbs cut of the floodplain of the river. The site is bordered to the north and east by county roads 64 and 29 respectively. A development is being constructed south of the 'site, and agricultural land is located to the west.