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REFERENCES <br /> Colton, R.B., and Fitch, H.R., 1974, Map showing potential sources of gravel and crushed-rock <br /> aggregate in the Boulder-Fort Collins-Greeley area, Front Range Urban Corridor, Colorado: U.S. <br /> Geol.Survey Misc.Geol. Inv. Map I-855-D. <br /> Schneider, P. A., 1983, Shallow groundwater in the Boulder—Fort Collins—Greeley area,Colorado, <br /> 1975-77:U.S.Geological Survey Water Resources Investigation Report 83-4058. <br /> • <br /> Asphalt Specialties Company, Inc., 2020. Investigative Boring Report for La Salle Property 17043 <br /> County Road 394,Weld County,Colorado,June 2020. <br />