During the American Civil War, the bridge offered the only rail access between the Potomac River and the cities of Fredericksburg and Richmond, making it a vital supply line to both the Confederate and Union armies.
One of the first tasks was to restore the 13-mile stretch of railroad from Aquia Creek to Falmouth that was destroyed by the retreating Confederate Army.
In May 1862, Herman Haupt supervised common Union infantrymen from the Army of the Rappahannock in harvesting two million feet of local lumber to construct the Potomac Creek Bridge, accomplishing this task in just nine working days.
[2] President Abraham Lincoln, on a visit on May 28, 1862, observed "That man Haupt has built a bridge four hundred feet long and one hundred feet high, across Potomac Creek, on which loaded trains are passing every hour, and upon my word, gentlemen, there is nothing in it but cornstalks and beanpoles."
The Union Army built as many as four railroad bridges atop the same abutment over the remaining years of the war.