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The Mountain Quarries RailRoad Bridge, the longest concrete arch railroad bridge in the world when it was built in 1912 was determined to have statewide historical significance by the County Board of Supervisors, the city of Auburn, and California State Parks and so received a California Historical Plaque on Sunday March 23rd in a ceremony led by Mike Lynch, State Parks’ Sector Superintendent, Auburn Sector – Gold Fields District was instrumental in getting the designation.
The triple span bridge was built by the Mountain Quarries Company and the Pacific Portland Cement Company for the purpose of hauling limestone from the nearby quarry to Auburn, 7 miles away. You can see a video of the unveiling and a photo album of the day’s events on our KAHI facebook page along.