S.H. 66 over Shell Creek
Canadian County, Oklahoma · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- S.H. 66 over Shell Creek in Canadian 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 1951, making it 74 years old at the 2025 inventory.
- It carries about 3,050 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 233 of the 495 inventoried bridges in Canadian County rated fair (47.1%); 18 (3.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated May 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 → (35.50774, -97.79084)
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 | Steel stringer or multi-beam girder |
| Length | about 162 ft |
| Location | 8.3 Mi. E. Jct. US81 |
| NBI structure number | 126300000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Canadian County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-40 over Creek | 1965 | 63,000 | Good |
| I-40 over Creek | 1966 | 40,700 | Good |
| I-40 over Creek | 1966 | 40,700 | Good |
| I-40 WB over Reno Ave. Under | 1966 | 31,500 | Good |
| Kilpatrick Tp WB over County Line Rd Under | 2019 | 30,400 | Good |
| Kilpatrick Tp EB over County Line Rd Under | 2019 | 30,400 | Good |
All bridges nearby: Canadian County, OK bridge conditions · every bridge in Canadian County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.