N4370 over Rock Creek
Mayes County, Oklahoma · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N4370 over Rock Creek in Mayes 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 1940, making it 85 years old at the 2025 inventory.
- It carries about 125 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 111 of the 233 inventoried bridges in Mayes County rated fair (47.6%); 30 (12.9%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated April 2023, on a 24-month routine inspection cycle.
- 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 → (36.45412, -95.22029)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 120 ft |
| Location | N4370e0380009 |
| NBI structure number | 094400000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | April 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Mayes County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Will Rogers Tpi-44 over Osage Creek | 1957 | 16,800 | Good |
| U.S. 412 over U.S. 69 Under | 1987 | 15,200 | Fair |
| Will Rogers Tpi-44 over Bitter Creek | 1957 | 15,000 | Good |
| Will Rogers Tpi-44 over Creek | 1957 | 15,000 | Good |
| Will Rogers Tpi-44 over Little Pryor Creek | 1957 | 15,000 | Good |
| Will Rogers Tpi-44 over Pryor Creek | 1957 | 15,000 | Fair |
All bridges nearby: Mayes County, OK bridge conditions · every bridge in Mayes County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.