N3980 over North Fork
Washington County, Oklahoma · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N3980 over North Fork in Washington County, Oklahoma, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1930, making it 95 years old at the 2025 inventory.
- It carries about 100 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 110 of the 215 inventoried bridges in Washington County rated fair (51.2%); 24 (11.2%) are rated poor.
- Its traffic status in the 2025 inventory is closed to all traffic (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Status change: newly closed since 2024.
- Its most recent inspection on record is dated November 2024, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (36.54078, -95.9193)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel through truss |
| Length | about 103 ft |
| Location | 12.9s.&1e.of Jct US75&60 |
| NBI structure number | 031380000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Closed to all traffic |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Washington County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. 75 over Turkey Creek | 1950 | 22,600 | Good |
| Fau 6110 (frank Ph over Caney River | 1980 | 20,700 | Fair |
| U.S. 60 over U.S. 75 Under | 1971 | 18,800 | Good |
| U.S. 60 over Caney River | 1971 | 18,800 | Fair |
| U.S. 75 over Rice Creek | 1949 | 16,400 | Fair |
| U.S. 75 over Coon Creek | 1983 | 14,700 | Fair |
All bridges nearby: Washington County, OK bridge conditions · every bridge in Washington County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.