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and incorporated into the stability computations during the process of <br />refining the preliminary design on the selected alternative for this project. <br />The same type of computational process shall be used in less detailed scope to <br />provide guidelines and evaluation data for the initial alternatives <br />presented. The geotechnical analysis shall also consider the future needs for <br />instrumentation or measuring devices to monitor performance after <br />rehabilitation. <br />Roller Compacted Concrete (RCC) may be a viable tool for providing adequate <br />erosion protection to the primary, secondary and emergency spillways, and to <br />meet design flood requirements. Therefore, MKE shall make a field <br />reconnaissance of potential construction materials during the Task 2 site <br />visit and select one or more sources for sampling of potential RCC aggregate. <br />The samples shall be subjected to a battery of laboratory tests, as specified <br />in Section 7.2.2 of this Document, to determine their physical <br />characteristics. In addition, at least on 1 RCC mix shall be made and <br />cylinders cast for determination of. ve Atrength and freeze -thaw <br />durability., A <br />The following is a description Q c!btechnical exploration program <br />C <br />proposed for Barnes Meadow Dam. <br />7.2.1 General Scope of Geotechnical Investigation <br />Over the years, a total of 6 boreholes have been drilled through the dam and <br />downstream of the darn. While these holes have described the material <br />encountered in the embankment and foundation, only general descriptions of the <br />material encountered are available for review. No specific soil strength <br />parameters are available for use in the stability or seepage analysis. In <br />addition, no in -place permeability tests of the dam and foundation have been <br />performed. The deepest of the holes drilled previously penetrated only 42 <br />Feet into the foundation material downstream of the dam and it cannot be <br />definitely determined whether the boreholes encountered a large boulder or <br />definitely penetrated bedrock. <br />- 8 - <br />