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<br />. <br /> <br />. <br /> <br />, <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />.' <br /> <br />identified along this canyon section as part of the surficial geologic <br />mapping. <br /> <br />Powell Park - It appears there is an abundance of gravel and sand <br />adjacent to the dam suitable for concrete aggregate and/or shell <br />material. About 10 test pits shall be excavated to confirm quantities <br />and to provide samples for laboratory testing. The investigation for <br />impervious borrow material will probably center around alluvial fans <br />from tributaries to the White River and colluvial surface material from <br />the right abutment. About 10 auger holes and 5 test pits shall be used <br />in this region to determine quantities and to provide material for <br />laboratory testing. A search shall be made for a source of suitable <br />riprap, probably in the hard marlstone of the Green River formation. <br /> <br />Products resulting from this task shall be logs of all boreholes and test <br />pits. This information will be correlated with seismic refraction to <br />produce sections and isopachs of the potential borrow areas. Results of <br />laboratory tests on construction materials sampled under this task will <br />either be shown on the logs or in a separate section of the final report. <br />In addition to the surficial geologic map, a construction materials map will <br />be prepared for each site showing the location, qualities and nature of <br />available material, as well as the physical characteristics determined from <br />laboratory testing. <br /> <br />Task 8 - Laboratory Testing <br />samples from the foundation <br />selected shall first be <br />System. All samples shall <br />following basic physical <br />Atterberg limits. <br /> <br />- Materials testing shall be conducted on soil <br />holes, auger holes, and test pits. All samples <br />classified by the Unified Soil Classification <br />undergo preliminary testing to determine the <br />properties: specific gravity, gradation, and <br /> <br />Secondary testing shall be conducted according to the potential use of the <br />material. Selected samples of potential embankment materials shall be <br />remolded to near maximum density and subjected to triaxial shear tests. <br /> <br />A-12 <br />