158th Avenue SW over North Fork Grand River
Bowman County, North Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 158th Avenue SW over North Fork Grand River in Bowman County, North Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 9 (excellent condition) on the 0-9 scale.
- It was built in 2007, making it 18 years old at the 2025 inventory.
- It carries about 90 vehicles a day (traffic count year 2017).
- Its listed owner is the county highway agency.
- It is one of 44 of the 69 inventoried bridges in Bowman County rated good (63.8%); 3 (4.3%) 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 2021, on a 48-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 → (45.95257, -103.66008)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 9 | 9 | Excellent condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 23 ft |
| Location | 19 South of Rhame |
| NBI structure number | 000000006119230 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2021 |
| Inspection interval (item 91) | 48 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 Bowman County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US Highway 85 over BNSF Railroad Sep | 2000 | 3,250 | Good |
| US Highway 85 over Creek | 1966 | 1,130 | Fair |
| US Highway 85 over Spring Creek | 1953 | 1,070 | Poor |
| US Highway 85 over Creek | 1966 | 1,050 | Good |
| US Highway 85 over Creek | 1966 | 1,050 | Fair |
| US Highway 85 over Creek | 1966 | 1,030 | Fair |
All bridges nearby: Bowman County, ND bridge conditions · every bridge in Bowman County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.