Irrfb Nd Hiway 23 over Missouri River
McKenzie County, North Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irrfb Nd Hiway 23 over Missouri River in McKenzie County, North Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 2005, making it 20 years old at the 2025 inventory.
- It carries about 5,070 vehicles a day (traffic count year 2019).
- Its listed owner is the state highway agency.
- It is one of 88 of the 136 inventoried bridges in McKenzie County rated good (64.7%); 1 (0.7%) 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 July 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 → (47.97979, -102.5616)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous prestressed concrete segmental box girder |
| Length | about 4,517 ft |
| Location | 3 West of Nd 1804 |
| NBI structure number | 0023046203 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 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 McKenzie County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US Highway 85 over Creek | 2014 | 12,880 | Fair |
| US Highway 85 over Creek | 2014 | 12,880 | Fair |
| US Highway 85 over Creek | 2014 | 12,880 | Fair |
| US Highway 85 over Creek | 2014 | 12,880 | Good |
| US Highway 85 over Drain | 2016 | 10,545 | Good |
| US Highway 85 over Wildlife Crossing | 2017 | 10,545 | Good |
All bridges nearby: McKenzie County, ND bridge conditions · every bridge in McKenzie County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.