This elegant truss bridge carries the US12 highway over the Missouri River/Lake Oahe between the city of Mobridge and the Standing Rock Sioux Reservation in South Dakota.
From bridgehunter.com: (
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"Overview
Through truss bridge over Missouri River (Oahe Lake) on US 12 at Mobridge
Location
Mobridge, Walworth County, South Dakota, and Corson County, South Dakota
Status
Open to traffic
History
Built 1959; rehabilitated 1980
Builders
- John F. Beasley Co. of Dallas, Texas (Superstructure)
- Massman Construction Co. of Kansas City, Missouri (Substructure)
- Mississippi Valley Structural Steel Co. of Decatur, Illinois (Girder Spans)
- Vincennes Steel Corp. of Vincennes, Indiana (Fabricator)
Design
Cantilevered Warren through truss
Dimensions
Length of largest span: 449.8 ft.
Total length: 5,058.6 ft. (1.0 mi.)
Deck width: 25.9 ft.
Vertical clearance above deck: 17.3 ft.
Also called
Mobridge Bridge
Approximate latitude, longitude
+45.56532, -100.46849 (decimal degrees)
45°33'55" N, 100°28'07" W (degrees°minutes'seconds")
Average daily traffic (as of 2017)
2,076
Inventory numbers
SD 65-000-020 (South Dakota structure number)
BH 32418 (Bridgehunter.com ID)
Inspection report (as of September 2018)
Overall condition: Fair
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 44.6 (out of 100)"