64th St SW over Antelope Creek
Grant County, North Dakota · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 64th St SW over Antelope Creek in Grant County, North Dakota, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1967, making it 58 years old at the 2025 inventory.
- It carries about 10 vehicles a day (traffic count year 2018).
- Its listed owner is the county highway agency.
- It is one of 6 of the 59 inventoried bridges in Grant County rated poor (10.2%); 6 (10.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: deck 8 to 7, superstructure 8 to 7.
- Its most recent inspection on record is dated June 2024, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (46.48581, -101.62945)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 7 | Good condition |
| Superstructure | 8 | 7 | Good condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 40 ft |
| Location | 3 North 2 West of Carson |
| NBI structure number | 000000019123170 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the North Dakota department of transportation.
Busiest bridges in Grant County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Nd Highway over Creek | 1950 | 950 | Fair |
| Nd Highway over Branch-antelope Creek | 1952 | 700 | Fair |
| Nd Highway 21 over Creek | 1994 | 590 | Fair |
| Nd Highway 49 over Antelope Creek | 1988 | 580 | Good |
| Nd Highway 31 over Dogtooth Creek | 2024 | 420 | Good |
| Nd Highway 49 over Cannonball River | 1970 | 420 | Fair |
All bridges nearby: Grant County, ND bridge conditions · every bridge in Grant County · North Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.