It was bought out by Charleston, SC interests in 1863 and became known as the Confederate Rolling Mill when it produced the former products as well as cannon.
Shortly after midnight on September 1, 1864, cavalrymen under the command of the retreating Confederate General J.B. Hood set fire to 81 ammunition train cars parked outside of the mill to prevent them from being acquired by General Sherman. The ensuing explosions destroyed the mill and destroyed or greatly damaged structures within 1/4 mile. The events were so loud that Sherman himself heard the explosions from approximately 23 miles away at Lovejoy's Station.
Part of what is now Boulevard was named Rolling Mill Street, when the street was extended north of the railroad in the late 1860s, thus commemorating the already destroyed mill. The name was changed to Boulevard around 1880.