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County Highway over Trib. to Bois De Sioux R

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

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

County Highway over Trib. to Bois De Sioux R in Richland 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 1986, making it 39 years old at the 2025 inventory.
It carries about 75 vehicles a day (traffic count year 2018).
Its listed owner is the county highway agency.
It is one of 102 of the 196 inventoried bridges in Richland County rated fair (52.0%); 24 (12.2%) 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
Nd Highway 13 over Bois De Sioux River	1929	15,200	Fair
Nd Highway 13 over Drain 18	1973	6,300	Fair
Interstate 29 over County Drain 2	1973	5,600	Good
Interstate 29 over County Drain	1973	5,600	Good
Nd Highway 13 over Small Creek	1973	5,530	Fair
Nd Highway 13 over Creek	1973	5,170	Good