The Viking Bridge in Traill County is one of North Dakota's three most endangered places, according to Preservation North Dakota.
The bridge spans the Goose River and was built in 1885 to connect Mayville and Portland, N.D., and is the oldest bridge still standing in the state.
It is an example of a pin-connected Pratt through-truss bridge, Preservation North Dakota said, which were popular in the United States at the end of the 19th century. The bridge is not in use. The North Dakota Department of Transportation is studying the best way to stabilize the bridge, with work expected to begin in 2010.
The other structures to make the list are the Buford-Trenton Pumphouse in Williams County and the Brittin Grain Elevator in Burleigh County.
Created in 2000, the 3 Most Endangered list includes sites that have historical, architectural or cultural significance and are in danger of demolition, deterioration or substantial alteration.
