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• L.A. Abrasion testing, petrographic analysis, and rock hardness <br />testing indicate the presence of soft particles throughout the <br />terrace gravel deposit. The soft particles are most prevalent in <br />the upper 5- to 10- feet of the deposit where it has been <br />affected by weathering and the presence of calcium carbonate <br />cementation. The quantity of soft particles decreases with <br />depth. <br />Based on the investigations to date, an estimated 13 million <br />cubic yards of available material has been identified in Borrow <br />Area B. Approximately 1.0 million cubic yards of this estimate <br />represent the volume of the clay overburden (Qeo), approximately <br />0.5 million cubic yards of lower clay (Qeol), and approximately <br />11.5 million cubic yards of terrace gravel deposits (Qt). <br />It is anticipated that some form of material processing will be <br />necessary to produce the required pervious embankment materials. <br />The production of filter sand, gravel drain material, and <br />concrete aggregate will require significant processing to produce <br />the typical Reclamation gradations that will be specified. Soil <br />cement aggregate can be produced by separation. Pit-run material <br />can be used for shell material in the dam embankment. <br />• <br />• e-ziminuche Construction Aafh, ': i <br />P.O. Box AA - Towaoc, CO $3.334 <br />AN?mas St.AccEi2-GR.avEL <br />bY i&(T S - pA&E T - id <br />2 <br />I