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Preliminary Report for Data Recovery at Sites MK -1-082317 and MK -2-082317 Colowyo Coal Company <br />Table 1. Cultural Features and Associated Units <br />Feature No. <br />Description <br />Associated Unit <br />F1 <br />Circular thermal feature <br />20ON 200E <br />measuring 73 by 60 cm. <br />199N 200E <br />F2 <br />Amorphous stained <br />205N 200E <br />sediment measuring 66 by <br />44 cm. <br />F3 <br />Circular thermal feature <br />199N 200E <br />measuring 35 by 30 cm. <br />F5 <br />Semi -circular stained <br />195N 196E <br />sediment measuring 54 by <br />51 cm. <br />the feature within the site grid system necessitated two 1 by 1 m units being established to <br />investigate it. <br />The feature's depth is 8.5 cm below the 200N 200E unit datum. Overall feature shape appears to <br />be a circular basin with a mostly even bottom. Minor root action is not significantly distorting the <br />overall shape. Feature fill consisted of dark stained sediment (5Y2.5/1, Black); varying dense <br />charcoal flecking and dense HAR. One hundred and eight pieces of HAR were recovered. Most <br />of the HAR is in the 3 to 1 cm diameter size class (29 pieces (0.50 kg)) and the 1 cm diameter <br />size class (35 pieces (0.50 kg)). The 5 to 3 cm diameter size class is the next most common (26 <br />pieces (0.80 kg)) with the remaining HAR in the 10 to 5 cm diameter size class (16 pieces (1.0 <br />kg)) and the 10 cm diameter size class (1 piece (0.75 kg)). <br />Figure 5. Site MK -1-082317, Feature 1, Pre -Excavation, facing north. <br />Tetra Tech September 29, 20? 7 <br />