E1520 over Irrigation Canal
Jackson County, Oklahoma · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- E1520 over Irrigation Canal in Jackson County, Oklahoma, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1940, making it 85 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 115 of the 294 inventoried bridges in Jackson County rated fair (39.1%); 4 (1.4%) are rated poor.
- 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 → (34.81274, -99.32662)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Concrete slab |
| Length | about 48 ft |
| Location | 2.0 N 0.5 E Blair |
| NBI structure number | 088450000000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Jackson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fau 5181 over Creek | 1940 | 7,750 | Good |
| Fau 5158 over Creek | 1945 | 6,355 | Good |
| Fau 5158 over Creek | 1957 | 6,350 | Good |
| U.S. 283 over Creek | 1932 | 6,200 | Good |
| U.S. 283 over Creek | 1999 | 6,200 | Good |
| U.S. 62 over Creek | 1933 | 5,900 | Good |
All bridges nearby: Jackson County, OK bridge conditions · every bridge in Jackson County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.