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<br />to be very difficult due to larger boulders; therefore, specialized equip- <br />ment may be required. However, it is expected that the special equipment <br />will increase production, therefore offsetting the increased costs involved. <br /> <br />One hole, approximately 100 feet deep, will be drilled at the site of the <br />proposed diversion dam. <br /> <br />Backhoe - A backhoe will be used for excavating test pits and trenches for <br />the construction materials exploration and for obtaining undisturbed samples <br />and conducting in situ permeability tests on the left abutment. A sufficient <br />number of pits will be excavated in potential pervious and impervious borrow <br />areas to determine available quantities and provide samples for laboratory <br />testing. <br /> <br />Auger - Auger holes will be drilled along the proposea pipeline route, as <br />required for sampling, to determine slope stability. Auger holes may also <br />be used to supplement backhoe excavations in the materials investigation. <br /> <br />Seismic Refraction - The left abutment will be covered, with the objective <br />of determining the thickness and extent of the impervious overburden layer <br />and if possible, depth to bedrock. <br /> <br />Materials Testing - All construction materials will be submitted to the ap- <br />propriate laboratory tests, generally consisting of classification, limits, <br />gradation, and triaxial compression. Emphasis will be placed on character- <br />izing the permeability of the materials comprising the left abutment by lab- <br />oratory and in situ tests. <br /> <br />Surveying - Surveying will be done, as required, to prepare topographic maps, <br />set control, and accurately locate drill holes and test pits. <br /> <br />Engineering - The engineer will supervise all facets of the field investi- <br />gation, compile geologic and topographic maps, and prepare a comprehensive <br />report. <br /> <br />2 <br />