65th St SW over Thirty Mile Creek
Hettinger County, North Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 65th St SW over Thirty Mile Creek in Hettinger 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 1984, making it 41 years old at the 2025 inventory.
- It carries about 20 vehicles a day (traffic count year 2018).
- Its listed owner is the county highway agency.
- It is one of 21 of the 64 inventoried bridges in Hettinger County rated good (32.8%); 9 (14.1%) 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 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 → (46.47219, -102.23575)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete single box beam |
| Length | about 85 ft |
| Location | 6 North 4 East of Mott |
| NBI structure number | 000000021134110 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 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 Hettinger County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Nd Highway 22 over Creek | 1960 | 1,100 | Fair |
| Nd Highway 22 over Cannonball River | 1960 | 830 | Fair |
| W 1st St over N Fork Cannonball River | 1982 | 700 | Fair |
| Nd Highway 8 over Cannonball River | 1979 | 670 | Good |
| Nd Highway 22 over Chanta Peta Creek | 1985 | 600 | Fair |
| 12th St over Creek | 1958 | 550 | Fair |
All bridges nearby: Hettinger County, ND bridge conditions · every bridge in Hettinger County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.