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US012 E over BNSF RR

Brown County, South Dakota · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

US012 E over BNSF RR in Brown County, South Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 2005, making it 20 years old at the 2025 inventory.
It carries about 2,878 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 95 of the 170 inventoried bridges in Brown County rated fair (55.9%); 20 (11.8%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 433 ft
Location	3.2 W Jct Sd 37
NBI structure number	000000007267330
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.

Bridge	Built	Vehicles/day	Condition
US012 over Moccasin Ck	1954	21,635	Poor
Second Street over First Ave NW	2003	11,055	Fair
Second Street over Burlington Northern RR	2003	11,055	Fair
Second Street over Railroad Ave SW	2003	11,055	Fair
3RD Avenue SE over Moccasin Creek	2019	5,087	Good
US281 over BNSF Railroad	2001	4,468	Fair