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146th Avenue over Spring Creek

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

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

146th Avenue over Spring Creek in Bowman County, North Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1981, making it 44 years old at the 2025 inventory.
It carries about 40 vehicles a day (traffic count year 2019).
Its listed owner is the county highway agency.
It is one of 44 of the 69 inventoried bridges in Bowman County rated good (63.8%); 3 (4.3%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Steel stringer or multi-beam girder
Length	about 49 ft
Location	3 East 8 South Bowman
NBI structure number	000000006135150
Condition class	Good

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