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construction materials will be requested from the appropriate <br />agencies. Field reconnaissance and reference to all available <br />data has been completed to evaluate the deposit from a geologic <br />perspective. <br />The fan materials consist of a very coarse fraction of basalt <br />cobbles and boulders up to 10 feet in size with a clay/silt <br />matrix. Visual examination of the materials suggests the grading <br />fs approximately 50 percent clay, silt, and sand, and 50 percent <br />gravel, cobbles, and boulders. This grading is only a rough <br />estimation; screening of several large samples would be required <br />to more accurately determine gradings. The visual examinations <br />also suggest that the sand and gravel sizes are not present <br />in large percentages. <br />Five test pits were excavated on May 6, 1999 along the Fontanari <br />portion of the Ute Water Pipeline to define the material types <br />and depths. Generally, the test pits revealed about 1 to 1.5 <br />feet of topsoil, a layer 2.5 to 14 feet thick of fine grained <br />soil with few cobbles, and the cobble and boulder zone about <br />11 to 15.5 feet thick. Bedrock of Mesaverde sandstone and shale <br />was reached in four of the test pits. <br />An approximation of 2,164,500 cubic yards of total alluvial <br />material available on the Fontanari property has been made using <br />estimated average depths. A large number of test pits, which <br />would be expensive, would be necessary to refine the volume <br />computations. <br />This unsorted fan deposit will require separation to produce <br />soil/rock material for each particular commercial specification, <br />but a large volume of earth material is present at the site. <br />The cobble and boulder sizes are almost entirely composed of <br />hard, dense basalt, which is a very durable rock type somewhat <br />unique wi[hin the Grand Valley area. Most of the bedrock <br />formations in the area are soft shales and poorly cemented <br />sandstones which do not have good durability. The rock types <br />and volume of material available at this proposed quarry site <br />will undoubtedly have commercial value, upon processing, for <br />construction needs in the local market. <br />Prepared by: <br />BARNES GEOLOGIC CONSULTING, INC. <br />~~ ~~~ ~.~ w 8011 "' <br />< 'AIPG • • <br />Joe G. Barnes, President •••_ ~ <br />Engineering Geologist ••„_ ;_ <br />4 <br />