Scenic Bridge - Tarkio, MT
Posted by: T0SHEA
N 47° 01.184 W 114° 39.370
11T E 678122 N 5210023
About four miles east of Tarkio and ten miles west of Alberton, this truss bridge would have been a major construction project when built in the 1920s.
Waymark Code: WMWNWV
Location: Montana, United States
Date Posted: 09/23/2017
Views: 1
"Scenic Bridge" is, indeed, an appropriate moniker for this bridge, as it describes not only the bridge but the surroundings, as well. When built in 1927-28, the bridge carried Highway 10 traffic over the Clark Fork River and under a Milwaukee Road Railroad bridge. Here, the river carves its way through a deep and narrow gorge in the valley while the bridge affords an excellent view of both the valley and the railroad bridge.
Originally 18 feet in width and widened in 1951 to 22 feet, the Pratt deck truss bridge consists of no less than seven truss spans, with " four 19-foot steel stringer approach spans, two 77-foot deck truss spans, and a 191-foot steel deck truss main span". In total it is 421 feet in length and, when completed in May of 1928, cost $85,000.
With the construction of I-90, Highway 10 became essentially superfluous, though it remained in use for many years. Today, though the highway remains open, the bridge is closed to all traffic but pedestrians. It remains accessible from both directions but barricades make the bridge itself inaccessible to vehicles.
Date Built: 05/01/1928
Length of Span: 421 feet
www: https://npgallery.nps.gov/pdfhost/docs/NRHP/Text/09001183.pdf
Parking Coordinates:: Not Listed
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Visit Instructions: Log your find with a picture of the bridge with yourself or your GPS in the foreground. This shot does not have to be taken "on" the bridge. The shot should show the "truss" structure of the bridge as well.
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