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<br />and Reservoir No. 3 is about 47 acres. The normal water surface of Reservoir No. 1 is <br />El. 5,041 and that of Reservoir No. 3 is El. 5,048. <br />PREVIOUS INVESTIGATIONS <br />Empire Laboratories, Inc. (Empire) performed a geotechnical investigation <br />(Project No. 955L-86) for the Goose Haven Reservoir Complex in 1986. At the time of <br />Empire's investigation, the site was being partially mined and the two existing Goose <br />Haven reservoirs were taking shape. Empire drilled 17 borings throughout the <br />property and found variable thicknesses of very sandy and silty clays interlayered <br />with sandy silts overlying sands, gravels, and cobbles underlain by claystone and <br />siltstone bedrock. Subsequent investigations (listed below) by CTL T confirmed <br />these soils and bedrocks. <br />CTL T performed investigations between 2002 and 2010 (CTL T Project Nos. <br />FC-2511, FC-2740, FC03360.000-125, FC03362.000-145, FC03371.000-125, and <br />• FC04794.001-145). The first investigations, performed in late 2002 and 2003, were <br />conducted to help the City evaluate the geology and subsurface conditions for <br />neighboring properties being considered by the City for expansion of the City's water <br />storage capability. The 2002 and 2003 investigations identified potentially mineable <br />sand and gravel deposits and suitable subsurface conditions for construction of a <br />new reservoir at the Goose Haven Reservoir Complex. The report for the most recent <br />Geotechnical Investigation by CTL I T titled "Geotechnical Investigation, Goose Haven <br />Reservoir Complex Expansion, Goose Haven Reservoir No. 2 Lafayette, Colorado". <br />(CTL T Project No. FC04797.000-145, dated March 10, 2010) summarizes the <br />numerous previous investigations conducted at this site and describes the <br />subsurface conditions encountered (see Appendix B). CTL I T incorporated pertinent <br />information from the previous investigations into this report to complete the ground <br />water response analysis. <br />AREA GEOMORPHOLOGY <br />The Goose Haven Reservoir Complex is located near the right (looking <br />downstream) or south side of the Boulder Creek Valley (Figure 1). The land surface is <br />McLAUGHLIN WATER ENGINEERS, LTD. 5 <br />GOOSE HAVEN RESERVOIR COMPLEX EXPANSION <br />CTL I T PROJECT NO. FC04797.002-145