Irrft Nd Hiway 57 over Devils Lake Narrows
Benson County, North Dakota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irrft Nd Hiway 57 over Devils Lake Narrows in Benson County, North Dakota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1999, making it 26 years old at the 2025 inventory.
- It carries about 4,000 vehicles a day (traffic count year 2019).
- Its listed owner is the state highway agency.
- It is one of 13 of the 40 inventoried bridges in Benson County rated fair (32.5%); 7 (17.5%) 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 October 2023, on a 24-month routine inspection cycle.
- 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.
View this bridge on a map → (48.02516, -98.89731)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 204 ft |
| Location | 1 South of Nd 20 South |
| NBI structure number | 0057012469 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 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 Benson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US Highway 2 over Creek | 1984 | 1,900 | Good |
| US Highway 281 over Creek | 2005 | 1,300 | Good |
| US Highway 281 over Creek | 2005 | 1,300 | Good |
| US Highway 281 over Creek | 2006 | 1,300 | Good |
| Nd Highway 19 over Mauvais Coulee | 2001 | 1,260 | Fair |
| N.d.highway 19 over Creek | 2005 | 730 | Fair |
All bridges nearby: Benson County, ND bridge conditions · every bridge in Benson County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.