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2023 Cultural Resource Site Assessments for Collom Expansion Project Colowyo <br />Tetra Tech June 2023 19 <br />For Official Use Only: Disclosure of Site Locations Prohibited (43 CFR 7.18) <br />occurred at the locality. Minor alluvial erosion was noted along the cutbank. Six white chert flakes <br />were noted in redeposited sediments, although none of the other previously identified lithic <br />concentrations were found during the revisit. The site had not been affected by mining activities. <br />Tetra Tech recommended that mining activities continue to avoid the area until further <br />assessment. <br />In 2023, Tetra Tech revisited the site as part of the third round of assessments (Figure 12). The <br />site appears to be in similar condition as the 2019 assessment. No new major slump events have <br />occurred at the locality; however, minor alluvial erosion continues along the cutbank. White chert <br />flakes were noted in redeposited sediments downslope. Due to ground conditions and angle of <br />repose of the cutbank, it was not inspected for safety reasons. The site has not been affected by <br />mining activities. Tetra Tech recommends that mining activities continue to avoid the area until <br />further assessment. <br /> <br />Figure 12. Site 5MF.4010 overview, facing northwest. Taken by E. Shikrallah on 5/17/2023. <br />NRHP Status and Condition Assessment <br />In 1995, Site 5MF.4010 was recommended by Metcalf Archaeological Consultants as needing <br />more data to determine its eligibility status. In 2005 TRC recorded five additional flake localities <br />and agreed with the 1995 recommendation. Based on the 2015, 2019, and 2023 revisits, Tetra <br />Tech agrees with the recommendation. No evidence was observed that the ongoing natural <br />erosion is significant enough to have removed the potential for a subsurface cultural resource <br />component(s). The site should continue to be avoided pending additional subsurface testing to <br />determine whether an intact subsurface cultural component is indeed present at the site. <br />