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<br />SITE DESCRIPTION <br />The project site is located in the south west Quarter of the south west Quarter <br />of Section 27, Township lOS ,Range 98 west ofthe 6th Principal Meridian, Mesa County, Colorado. <br />More specifically the site is located within the old town site of Cameo, CO, immediately west of the <br />Public_Service Company power plant and the government Highline Canal. The site is immediately <br />north of the Coal Canyon Creek and is entirely within the Coal Canyon drainage which is joining the <br />Colorado River, approximately 1/3 mile east of the site. <br />The topography of the site is relatively flat, being located on an alluvial plain <br />of the Coal Canyon Creek, which is adjoining the Colorado River flood plain. The ground surface <br />in the vicinity of the site has an overall gradient to the east. The exact direction of surface runoff on <br />this site will be controlled to an extent by the existing construction and is somewhat variable. Surface <br />drainage on this site can be described as fair and subsurface drainage can be described as fair to good. <br />• ;.. <br />GENERAL GEOLOGY AND SUBSURFACE DESCRIPTION <br />The geologic materials encountered under the site consist of in excess of 15 <br />feet of alluvial clays, silts and sand, gravel and boulder sized fragments of sandstone, siltstone, <br />mudstone and shale. The thickness of the Coal Canyon alluvial fan is not known and was not <br />completely penetrated by the two exploration borings placed on this site. The geologic and <br />engineering properties of the materials found in our two exploration borings will be discussed in the <br />following sections. <br />The soils on this site consists of an alluvial deposit placed by the action of the <br />Coal Canyon Creek. These alluvial soils are very stratified, being derived from the sandstones, <br />siltstones, mudstones and shales of the Mount Garfield Formation of the Mesa Verde Group, which <br />are exposed on the cliffs to the north west and south of the site. These alluvial deposits appear to <br />contain significant amounts of coarse grained debris, indicating that some of the strata may be the <br />result of ancient debris flow activity. At a depth of approximately 8 to 10 feet in both exploration <br />. borings, a very large sandstone fragments was encountered in Boring # I and fragments of sandstone, <br />3 <br />