Scenic Bridge

Scenic Bridge
LocationMilepost 0 on Old U.S. Route 10 West, about 4 miles (6.4 km) east of Tarkio, Montana
Coordinates47°01′12.4″N 114°39′25.5″W / 47.020111°N 114.657083°W / 47.020111; -114.657083
Area2 acres (0.81 ha)
Built1928
Built byWilliam P. Roscoe Company
Architectural stylePratt deck truss
MPSMontana's Historic Steel Truss Bridges
NRHP reference No.09001183[1]
Added to NRHPJanuary 4, 2010

The Scenic Bridge crossing Clark Fork River about 4 miles (6.4 km) east of Tarkio in Mineral County, Montana, was built in 1928. It is located at Milepost 0 on Old U.S. Route 10 West. The bridge has also been denoted 24MN304 and MDT No. L31012000+08.[2] It was listed on the National Register of Historic Places in 2010.[1]

The bridge is a riveted Pratt deck truss bridge. It has three main spans upon reinforced concrete abutments and piers. The bridge is 421 feet (128 m) long in total, with four 19-foot (5.8 m) approach spans, two 77-foot (23 m) deck truss spans, and a 191-foot (58 m) deck truss main span. It is 25 feet (7.6 m) wide, supporting a 24-foot (7.3 m) roadway.[2]

This Pratt deck truss design is visually pleasing and rare. It was chosen by state staff for relatively rare circumstances during 1928 to 1932, after which a version of a Warren truss design was used.[2]

See also

References

  1. ^ a b "National Register Information System". National Register of Historic Places. National Park Service. July 9, 2010.
  2. ^ a b c Jon Axline (May 13, 2009). "National Register of Historic Places Registration: Scenic Bridge / 24MN304, MDT No. L31012000+08". National Park Service. Retrieved September 6, 2017.
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