Harrisburg Nail Works
While other mills served their local community and if successful, exported some of their products, this nail manufactory in East Pennsboro Township became one of the largest of its kind in the United States.
Sawmills
Willow Mill
Willow Mill, the only mill building still standing in Silver Spring Township, was a substantial industrial complex in its prime. Built in approximately 1794, the mill was still grinding grain through the end of the 1800s. The site then transitioned into an outdoor retreat and amusement park.