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The alluvial fan materials consist of a very coarse fraction of <br />basalt cobbles and large boulders up to 10 feet in size with a <br />clay/silt matrix. A visual examination of materials excavated <br />from the existing Western Slope Flagstone Quarry No. 2 suggests <br />the grading is approximately 50 percent silt, clay, and sand, <br />and 50 percent gravel, cobbles, and boulders. This grading <br />is only an estimation; screening of several large samples would <br />be required to more accurately determine gradings. The visual <br />examination also suggests that the sand and gravel sizes are not <br />present in large percentages as the fine sizes and very coarse <br />sizes seem to dominate. <br />Prepared by: <br />BARNES GEOLOGIC CONSIILTING, INC. <br />Joe G. Barnes, President <br />Engineering Geologist <br />`' ~ 8C11 -`+ <br />A[PG <br />' ~~. <br />4 <br />