Rundown and Closure
After the introduction of smokeless powder, the mills were to be closed in the 1910s, but were kept open at the request of the Federal government until after the end of World War I.
In 1952 family members donated 185 acres (0.75 km2) of land and the DuPont company established a $6,000,000 endowment for the Eleutherian Mill-Hagley Foundation for a museum of industrial history.
The site was declared a National Historic Landmark in 1966.
It is located on Delaware Route 141 at the Tyler Mcconnell Bridge spanning the Brandywine Creek.
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