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Cultural Resource Historic Properties Treatment Plan for BK -2-082818 Colowyo Coal Company <br />(OAHP) in conformation with the Native American Graves and Repatriation Protection Act <br />(NAGPRA). <br />3.3 Laboratory Analysis <br />Tetra Tech's Salt Lake Office maintains a climate control archaeological laboratory for the <br />processing and analysis of recovered cultural material. Bulk feature sample processing will be <br />stored and processed at appropriate at its offsite laboratory facilities. All encountered artifacts will <br />be collected for laboratory analysis except unmodified heat altered rock as described in Section <br />3.3.1. <br />3.3.1 Artifact Processing and Analysis <br />The collected cultural material is expected to be predominately lithic debitage and faunal remains. <br />The potential exists for stone tools and/or groundstone artifacts to also be recovered. The <br />potential for prehistoric ceramics and non -bone organic material is considered low. In -field <br />recovery will collect artifacts by material type/class (if recovered from screen) or specific point <br />provenience (if found in context). What will not be collected is unmodified, heat altered rock. Heat - <br />altered rock will be documented in the field based on physical characteristics (ex. cracked, <br />reddened, size class), sorted by size class, and weighted in bulk by class. Research has shown <br />such analysis effective in determining a features' possible functions throughout that use life. <br />Further analysis of collected artifacts will occur in a laboratory setting. Prior to specific artifact <br />analysis, artifacts will be appropriately prepared (ie. washing, labeling, etc. as appropriate) and <br />further subdivided from material classifications into initial functional classifications (ex. biface, <br />mano, etc.). Individual artifact class analysis will include, but not be limited to, material, form, <br />modification (if any), and method of manufacture. Debitage analysis will conform to current <br />methodologies that focus on the analysis of each flake and it's characteristic. If the recovered <br />debitage is significantly numerous to render such individual flake analysis impractical, mass <br />aggregate analysis methods will be applied. Reference guides, regional research, and other <br />informational sources will be used to assist in the analysis. Analysis related to other artifacts <br />classes (ex. stone tools, groundstone, and/or ceramics) will be stand observation/description <br />analysis specific to the class. All artifact analysis will be tracked electronically in our artifact <br />catalog database(s) and paper backup. The database will catalog all data recovered from the <br />artifacts both in field and in the laboratory. <br />3.3.2 Faunal Analysis <br />Faunal bone will be analyzed per standard zooarchaeological analysis practice (Reitz and Wing <br />1999). Recovered specimens will be categorizes from general to specific as artifact completeness <br />allows. Each fragment will be categorized, as possible, by species, age, side, and element. Bones <br />will be dry washed for examination of potential evidence of processing including cut/saw marks <br />and any other cultural modifications. Depending on the size and nature of the bone assemblage, <br />further analysis, like Minimum Number of Identified specimens, will be employed to the <br />assemblage. <br />3.3.3 Feature Fill Flotation <br />Tetra Tech will subject recovered feature fill to flotation analysis to identify, collect, and analyze <br />any organic (ex. seeds or inorganic (ex. micro-debitage) artifact potentially present in the fill, but <br />typically unrecoverable as a field setting. The recovered material will be cataloged and analyzed <br />Tetra Tech June 29, 2018 <br />