Casselman River Bridge


The Casslman River Bridge is a relic of the nation's early transportation engineering history. Erected in 1813-14, the Casselman River Bridge served as an important link on the National Road until 1933, when a new steel bridge was built across the river. At the time of its construction, it was the longest single-span stone arch bridge in the world. Reportedly, it was made longer than it needed to be, in hopes that the planned Chesapeake and Ohio Canal would pass under it.

Activity Details

Activity Type:Trips and Destinations
Discipline:Civil
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Time:Full day

Fun Fact:Because the 80-foot arch was the largest of its time, skeptics predicted that the bridge would collapse when the supporting timbers were removed. Reportedly, to avoid having the general public present if the bridge should indeed collapse, the contractor went out the night before the opening ceremonies and loosened the supports. The bridge stood.