In 2004, the University of Wisconsin–Milwaukee joined the Bureau of Land Management team expanding the excavations to new areas. By the end of that season, 65 mortars and over 200 arrow and spear points had been found. The oldest points may be as much as 6,000 years old. In the second season, archaeologists also found United States Army buttons. This shows that the inhabitants of this site had contact with the United States military before it was abandoned, probably sometime between the 1840s and 1880s.
