The Fourmile sites are found along the Allegheny River, and have not been adequately defined. Preliminary site descriptions can be found in Northeastern Middle Woodland, from the Perspective of the Upper Allegheny Valley by Steven P. Howard (2010).
Middle Woodland cache blades from the Fourmile Tract.
Middle Woodland bladelet from the Fourmile Tract, made from Vanport chert.
Bifaces and a banded slate gorget or pendant fragment from the Fourmile site. Various time periods are represented here.