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<br />.' <br /> <br />.' <br /> <br />\ ~, <br /> <br />. <br /> <br />. <br /> <br />~ <br /> <br />2.2 Task 2 - Field Investiqation <br /> <br />The purpose of this task is to provide sufficient data <br />concerning the configuration, condition and component material <br />properties of the outlet structure, embankment and foundation to <br />provide a firm technical foundation for the development of a <br />suitable, cost effective remedial design. The proposed field <br />investigation will consist of a detailed site inspection, backhoe <br />excavation, surface geophysics, drilling, soil sampling and <br />piezometer installation. <br /> <br />We understand that no recent, accurate and reliable <br />topographic maps of the dam and impoundment exist at a scale <br />suitable for use in engineering studies. We recorrmend that FWDC <br />contract with a firm that performs aerial photography and <br />topographic mapping to have an air photo-based topographic map of <br />the site made. We estimate that a topographic map of the dam and <br />impoundment can be made for less than $5,000. We have not included <br />this critical work item in our workscope and attached surrmary of <br />estimated costs to minimize unnecessary pass-through charges from <br />SRK to FWDC. Based on our experience at Buckeye Reservoir Dam and <br />on other projects, we believe that this investment will minimize <br />possible survey and datum confusion during the investigation, <br />design and construction phases, and may save money in both the <br />short- and long-term. In addition, the aerial topographic mapping <br />will allow relatively accurate determination of the reservoir's <br />, <br />storage capacity as a function of water storage elevation. <br />Conventiona 1 ground surveyi ng to determi ne th is re 1 at ionship a lone <br />could easily cost $3,000. <br /> <br />2.2.1 <br /> <br />Site Inspection <br /> <br />The proposed site inspection will consist of a <br />detailed inspection of the outlet conduit, the area <br />irrmediately downstream of the dam, the embankment, and <br /> <br />-4- <br />