Irrfb Nd Hiway 23 over Shell Creek
Mountrail County, North Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irrfb Nd Hiway 23 over Shell Creek in Mountrail County, North Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2012, making it 13 years old at the 2025 inventory.
- It carries about 4,885 vehicles a day (traffic count year 2019).
- Its listed owner is the state highway agency.
- It is one of 15 of the 28 inventoried bridges in Mountrail County rated good (53.6%); 1 (3.6%) 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 August 2024, 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 → (47.9778, -102.27474)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 134 ft |
| Location | 10 East of N.d. 1804 |
| NBI structure number | 0023059597 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| 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 Mountrail County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Irrfb Nd Hiway 23 over Crane Creek | 2012 | 7,340 | Good |
| Irrfb Nd Hiway 23 over Creek | 1995 | 5,510 | Good |
| Irrfb Nd Hwy 23 over Creek | 2013 | 3,165 | Good |
| Irrfb Nd Hiway 23 over Creek | 1993 | 2,600 | Good |
| Nd Highway 8 over Little Knife River | 1985 | 2,110 | Good |
| Irrfb Nd Hiway 23 over Creek | 1953 | 1,920 | Fair |
All bridges nearby: Mountrail County, ND bridge conditions · every bridge in Mountrail County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.