DuPont powder mills (Eleutherian Mills)

Then

The du Pont mills on the Brandywine sold 4 million barrels of powder to the federal government during the war and became the largest black powder maker in the country. DuPont and Hazard each supplied about a third of the Union's gunpowder. The Delaware mill stood close to the battle line and was considered vulnerable to sabotage.

The mills kept running until 1921.

Now

Museum

The powder yards, the first du Pont home and a 19th-century machine shop form the Hagley Museum and Library, opened in 1957 and a National Historic Landmark since 1966.

The nearest railroad in service today is a line owned by a smaller railroad, about 0.9 miles away.