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2023 Cultural Resource Site Assessments for Collom Expansion Project Colowyo <br />Tetra Tech June 2023 22 <br />For Official Use Only: Disclosure of Site Locations Prohibited (43 CFR 7.18) <br /> <br />Figure 14. Site 5MF.5418 overview, facing northeast. Taken by E. Shikrallah on 5/16/2023. <br />5MF.5419 – Rock Cairn, Needs Data <br />Site 5MF.5419 is a rock cairn originally recorded in 2004 by Metcalf Archaeological Consultants <br />for the Colowyo Mine’s 2004-2005 Collom Drilling Program. The site is reported as a crescent- <br />shaped pile of sandstone rocks aligned in an eastern direction. The pile is 1.3 m long, 70 cm wide, <br />and less than 0.5 m in height. Each tabular cobble measures about 7-8 cm in diameter by about <br />1 cm thick. No additional prehistoric or historic artifacts were observed during initial recording. <br />The site has been revisited since the original recording. It was revisited in 2005 by TRC as part <br />of the Collom Mine Expansion Class III Inventory project and in 2015 by Tetra Tech as part of the <br />Collom Mine Expansion Site Assessment project. Both revisits reported no changes. <br />In 2019, Tetra Tech revisited the site as part of the second round of assessments. Due to heavy <br />vegetation growth, Tetra Tech was unable to relocate the cairn. No impacts were observed in the <br />area to indicate the cairn had been removed. The cairn was still present, but in a very dense stand <br />of sagebrush. Mining activities had not impacted the area and were not visible from the reported <br />location of the cairn. Tetra Tech recommended that mining activities avoid the area until further <br />assessment. <br />In 2023, Tetra Tech revisited the site as part of the third round of assessments (Figure 15). Tetra <br />Tech was able to relocate the cairn even though it has been heavily overgrown by vegetation. <br />The cairn has not changed compared to the 2005 and 2015 recordings. Mining activities have not <br />impacted the area and are not visible from the location of the cairn. Tetra Tech recommends that <br />mining activities continue to avoid the site until further assessment is completed to fully evaluated <br />the site’s NRHP eligibility or potential importance to Native Americans. <br />