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-26- <br />Breternitz's survey and excavation program conducted in Dinosaur National <br />• Monument during the 1960's (Breternitz 1970)., Archeological inventories in <br />the Piceance Basin, located about 45 airmiles southwest of the study area, <br />have been conducted by Calvin Jennings of Colorado State University (Jennings <br />1974) and other inventories are currently being conducted in the Basin by <br />Alan Olson of the University of Denver. <br />Nearer the study area, Breternitz has recently conducted several short <br />reconnaissances in the Williams Fork area for the Stearns and Rogers Cor- <br />poration (Breternitz 1971,1972). Several sites were recorded during these <br />surveys that fall within the Grace railroad rights of way. These sites are <br />SMF279, 280, 281, 282, and 28S. Sites 279, 280, and 281 are identified <br />as chipping stations and are the same sites recorded during the present in- <br />vestigation as SMF437, 438, and 436 respectively. SMF283, also a chipping <br />station, could not be located accurately from the information given on the <br />site form. <br />Site SPSF289 was identified as a panel of petroglyphs and pictograph <br />groupings extending for c4 mile on a cliff face along a road to the Empire <br />Energy Mine. The location of the site is given as SW4 of Section 31, T6N, <br />• R91Sd, Round Bottom 7c2' Quad. The main themes depicted are horse riders <br />with shields, headdresses, and bows and arrows, and several representations <br />of deer, bison, and mountain sheep (Breternitz 1972:6-7). The rock art is <br />identified as the work of the Utes and the presence of horses indicates a date <br />no earlier than the 1680's (cf. discussion of Stewart's hypothesis in Section <br />4.1.3). The site was visited during the present investigation, but little <br />evidence of the motifs described by Breternitz remains. All that could <br />be seen was one spiral drawn in red hematite and a few red splotches in <br />other areas. In the three intervening years, vibration from trucks using the <br />mine road and/or activities of pothunters have obliterated some excellent <br />examples of rock art that had survived essentially intact for the previous <br />several hundred years. <br />A few pictographs of the same general nature as the rock art at SMF289 <br />were found at the nearby site SMF281/436 and are also identified as having <br />been made by Utes. One may not infer, however, that the artifacts also <br />found at the site are Ute since there was no stratigraphic association <br />between the two. <br />. ~ One site, SPff362, was located by E. A. Jackson in 1974 during a pre- <br />