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2023 Cultural Resource Site Assessments for Collom Expansion Project Colowyo <br />Tetra Tech June 2023 8 <br />For Official Use Only: Disclosure of Site Locations Prohibited (43 CFR 7.18) <br />or washed downslope since 2015. The natural erosion processes at the site do not appear to <br />have been significant since the 2019 visit. Tetra Tech recommends that mining activities continue <br />to avoid the site until further assessment is completed to fully evaluated the site’s NRHP eligibility. <br />NRHP Status and Condition Assessment <br />Site 5MF.969 was first recommended as needing additional data to be eligible for the NRHP in <br />1980. The BLM posited that the site is one of the first well documented Paleoindian sites in the <br />region and possesses the ability to further contribute to the body of data regarding subsistence <br />strategies in northwest Colorado. In 1983, Mariah Associates Inc. tested the site by mechanical <br />soil auger and failed to yield any positive results of additional buried cultural material. However, <br />the site remained potentially eligible and further testing was recommended to determine the extent <br />of any potentially eligible subsurface material. In 1995, Metcalf Archaeological Consultants <br />located a small grey quartzite interior waste flake along the edge of the arroyo downstream from <br />where the bison was butchered. In 2005 TRC noted no change to the overall site condition and <br />concurred with the NRHP recommendation. No significant changes to the overall site condition <br />were observed during the 2015, 2019, and 2023 revisits. Tetra Tech concurs with the <br />recommendation that additional data collection needs to occur prior to formal NRHP eligibility <br />determination. The site should continue to be avoided pending additional subsurface testing to <br />determine whether unobserved subsurface cultural material is indeed present at the site. <br /> <br />Figure 4. Site 5MF.969 overview, facing south. Taken by E. Shikrallah on 5/17/2023. <br />5MF.1652 – Prehistoric Artifact Scatter with Features, Needs Data <br />Site 5MF.1652 was originally recorded in 1983 by Mariah Associates for the Danforth Hills Utah <br />International project. The site was recorded as a prehistoric camp and broad lithic scatter. Since <br />the original recording, the site has been revisited twice. It was revisited in 2005 by TRC for the