N4510 over Fly Creek
Delaware County, Oklahoma · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N4510 over Fly Creek in Delaware County, Oklahoma, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor 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 27 of the 161 inventoried bridges in Delaware County rated poor (16.8%); 27 (16.8%) are rated poor.
- 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 → (36.62798, -94.96344)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 4 | Poor condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 25 ft |
| Location | 2W 1N of Bernice |
| NBI structure number | 023770000000000 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Delaware County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| S.H. 10 over Creek | 1946 | 11,300 | Fair |
| N4620 (2108C) over Creek | 2018 | 8,240 | Good |
| U.S. 59 over Drowning Creek | 1973 | 7,600 | Fair |
| U.S. 59 over Elm Branch Creek | 1925 | 7,300 | Fair |
| U.S. 59 over Honey Creek | 2002 | 7,300 | Fair |
| Cherokee Tp over Creek | 1991 | 6,300 | Good |
All bridges nearby: Delaware County, OK bridge conditions · every bridge in Delaware County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.