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<br />I <br />I. <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I- <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />.- <br />I <br /> <br />. <br /> <br />. <br /> <br />Woodward-Clyde <br />Consultants <br /> <br />remedial design. The proposed field investigation will consist of a detailed site <br />iIispection, surface geophysics, drilling, soil sampling and piezometer installation. <br /> <br />2.2.1 Site Inspection <br /> <br />The proposed site inspection will consist of a detailed inspection of the area immediately <br />downstream of the dam, the embankment, and the impoundment. The inspection effort <br />will be concentrated on the areas with existing sinkholes. This task will be performed <br />in conjunction with the drilling program. A detailed written summary of the results of <br />the site inspection will be prepared and presented as part of the feasibility report. <br /> <br />2.2.2 Embankment and Impoundment <br /> <br />The existing sinkholes will be dimensioned and located on a suitable map based on <br />surveyed coordinates and elevation. A walk-over inspection of the impoundment <br />immediately upstream of the dam will be conducted to locate other possible sinkhole <br />sites and bedrock outcrops in general. These sites will also be located on the map. In <br />addition, springs and associated measuring weirs in the area immediately downstream <br />of the dam will be located and shoWn on the map. A surface assessment of the site <br />geology will also be made at this time. <br /> <br />2.2.3 Surface Geophysics <br /> <br />Surface geophysical techniques such as self potential (SP), resistivity, seismic refraction <br />and ground penetrating radar, can sometimes provide data on general embankment and <br />foundation conditions which can be extremely valuable and cost effective when <br />interpreted in conjunction with data from strategically placed boreholes and backhoe test <br />pits. Based on our present knowledge of the site geology, foundation and embankment <br />conditions, we believe that relatively inexpensive SP and resistivity surveys may be <br />applicable at Beaver Reservoir to better define embankment condition, foundation <br />geology and potential high seepage zones. The subsurface profiles generated from these <br />surveys would be used to better define the site geology, delineate zones of concentrated <br />faulting and fracturing, and highlight areas with possible high concentrations of <br />subsurface voids or relatively high moisture contents. As the applicability of these <br /> <br />92D227P/P227 06-2.5-92(lO,17pm)IPRO/54 <br /> <br />-4- <br />