Kelly Williams was taking photos of the storm damage near his Rapho Township home today.
He heard two women say they heard snapping noises coming from the nearby Siegrist's Mill covered bridge.
Williams pointed his camera at the historic bridge and captured a video of it just as it drifted off its base and down the rushing Chiques Creek.
"It was pretty slow," he said. "It leaned more and more and then just sort of broke away."
During Tropical Storm Agnes in 1972, the bridge survived with minimal damage, neighbors told Williams.
Flood waters shifted the bridge a few feet. Afterward, it was concreted back into place.
Today, the bridge could not hold.
The bridge weighed five tons and straddled the border between West Hempfield and Rapho townships.
Built in 1885 by James C. Carpenter for $1,872, it originally was known as Michael Moore's Mill Bridge. The name changed when the Siegrist family purchased the mill in 1895, according to the website of the Pennsylvania Dutch Convention & Visitors Bureau.
Owned by the county, it is listed on the National Register of Historic Places