Co Hwy 4 over Buffalo Coulee
Traill County, North Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Co Hwy 4 over Buffalo Coulee in Traill County, North Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 9 (excellent condition) on the 0-9 scale.
- It was built in 2023, making it 2 years old at the 2025 inventory.
- It carries about 30 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- It is one of 46 of the 147 inventoried bridges in Traill County rated good (31.3%); 26 (17.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 2023, on a 24-month routine inspection cycle.
- 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.
View this bridge on a map → (47.61866, -96.96246)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 9 | 9 | Excellent condition |
| Superstructure | 9 | 9 | Excellent condition |
| Substructure | 9 | 9 | Excellent condition |
Bridge details
| Structure | Prestressed concrete single box beam |
| Length | about 69 ft |
| Location | 6 East 1 North Buxton |
| NBI structure number | 000000049124042 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the North Dakota department of transportation.
Busiest bridges in Traill County
| 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 |
All bridges nearby: Traill County, ND bridge conditions · every bridge in Traill County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.