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Preliminary Report for Data Recovery at Sites MK -1-082317 and MK -2-082317 Colowyo Coal Company <br />Figure 17. Site MK -2-082317, Feature 2, Full Excavation, facing west. <br />3.2.3.3 Feature 4 <br />Feature 4 is semi -circular dark stained sediment with charcoal flecking approximately 41 cm north <br />to south by 89 cm east to west (Figures 18 and 19). Actual top of the feature is unknown. However, <br />the feature appears to be approximately 10 cm below ground surface. The size and location of <br />the feature within the site grid system necessitated one 1 by 1 m unit being established to <br />investigate it. <br />The feature's depth below the mechanically exposed surface is 11 cm below the 186N 196E unit <br />datum. Overall feature shape appears to be roughly circular in planview with an irregular basin <br />profile. Two large roots pass through the features and insect burrows is moderately distorting the <br />eastern half of the feature, but the western half is largely intact. Feature fill consisted of dark <br />stained sediment (10YR3/1, Very Dark Gray) with sparse charcoal flecking. Several unaltered <br />rocks are also included in the feature fill. <br />Tetra Tech September 29, 2017 16 <br />