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US Highway 12 over Buffalo Creek

Bowman County, North Dakota · rated Fair in the 2025 National Bridge Inventory

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

US Highway 12 over Buffalo Creek in Bowman County, North Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1993 and reconstructed in 2005, making it 32 years old at the 2025 inventory.
It carries about 1,000 vehicles a day (traffic count year 2019).
Its listed owner is the state highway agency.
It is one of 22 of the 69 inventoried bridges in Bowman County rated fair (31.9%); 3 (4.3%) 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

Component	Rating (2025)	FHWA scale meaning
Culvert	6	Satisfactory condition

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

Bridge	Built	Vehicles/day	Condition
US Highway 85 over BNSF Railroad Sep	2000	3,250	Good
US Highway 85 over Creek	1966	1,130	Fair
US Highway 85 over Spring Creek	1953	1,070	Poor
US Highway 85 over Creek	1966	1,050	Good
US Highway 85 over Creek	1966	1,050	Fair
US Highway 85 over Creek	1966	1,030	Fair