The Bollman Truss Railroad Bridge at Savage, Maryland is the sole surviving example of a revolutionary design in the history of American bridge engineering. The 160-foot (48.8 m) double-span truss bridge is one of the oldest standing iron railroad bridges in the United States; currently, however, it is in use carrying the Savage Mill Trail across the Little Patuxent River. It was the first successful all-metal bridge design to be adopted and consistently used on a railroad.
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