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Hamilton Street over Buffalo Creek

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

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

Hamilton Street over Buffalo Creek in Bowman County, North Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
It was built in 1958, making it 67 years old at the 2025 inventory.
It carries about 30 vehicles a day (traffic count year 2019).
Its listed owner is the county highway agency.
It is one of 3 of the 69 inventoried bridges in Bowman County rated poor (4.3%); 3 (4.3%) are rated poor.
A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.

Component ratings

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