Extensive test excavations (81.25m area, 8.35m of excavated deposit) at the Mill Creek No. 6 site (35LA365) located in the Mohawk River drainage have demonstrated that the manufacture and maintenance of flaked stone tools were important tasks performed at the site. Primary lithic reduction and a full sequence of biface reduction occurred at the site.
The presence of large leaf shaped projectile points and a large size notched point at the site is simlar to the mix of projectile points from the upper levels of Cascadia Cave. On the basis of this the occupation of Mill Creek No. 6 is assigned to a period around 4000 B.C. and is seen as transitional between the Early Archaic period Cascadia Phase and the Baby Rock Phase of the Middle Archaic period.
The Mill Creek No. 6 site is judged to be eligible for listing on the National Register of Historic Places.