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73-61176 is an early-stage bifacial overshot thinning flake discovered in situ at 411.455 masl with a finely faceted bifacial platform and distal termination that removed a square edge from an opposing tool margin. This debitage was found below the stratigraphic position of the three oldest radiocarbon ages, dating 15,310 to 15,100 cal BP [1].

73-626 is a stemmed projectile point discovered in pit feature A2 (PFA2), Area A at Cooper’s Ferry site in Idaho [1][2].

73-628 is a stemmed projectile point discovered in pit feature A2 (PFA2), Area A at Cooper’s Ferry site in Idaho [1][2].

73-4423 is a hammerstone discovered in pit feature A2 (PFA2), Area A at Cooper’s Ferry site in Idaho [1].