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Interstate 29 over BNSF Separation

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

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

Interstate 29 over BNSF Separation in Traill 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 deck, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1969 and reconstructed in 1983, making it 56 years old at the 2025 inventory.
It carries about 4,550 vehicles a day (traffic count year 2019).
Its listed owner is the state highway agency.
It is one of 75 of the 147 inventoried bridges in Traill County rated fair (51.0%); 26 (17.7%) 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 prestressed concrete single box beam
Length	about 330 ft
Location	3 North of Nd 200
NBI structure number	0029114039 R
Condition class	Fair

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

Bridge	Built	Vehicles/day	Condition
Interstate 29 over North Branch Elm River	2021	11,635	Good
Interstate 29 over Buffalo Coulee	1969	9,400	Good
Interstate 29 over Branch of Buffalo Coulee	1969	9,100	Good
Interstate 29 over Branch of Buffalo Coulee	1969	9,100	Good
Nd Highway 18 over Goose River	1966	4,800	Fair
Interstate 29 over Goose River	1970	4,550	Poor