N4660 Rd over I-40 Under
Sequoyah County, Oklahoma · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N4660 Rd over I-40 Under in Sequoyah 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 1964, making it 61 years old at the 2025 inventory.
- It carries about 101 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 155 of the 262 inventoried bridges in Sequoyah County rated fair (59.2%); 9 (3.4%) 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 October 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 → (35.43502, -94.72748)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 194 ft |
| Location | 4.81 E Jct US-59 |
| NBI structure number | 161270000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Sequoyah County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. 64 over Ark River & R.R./ Co.rd. | 1973 | 32,947 | Fair |
| I-40 WB over U.S. 64 Under | 2020 | 23,340 | Good |
| I-40 EB over U.S. 64 Under | 2020 | 23,340 | Fair |
| I-40 WB over Little Sallisaw Creek | 2020 | 23,340 | Good |
| I-40 EB over Little Sallisaw Creek | 2020 | 23,340 | Good |
| I-40 over Farm Rd Under | 1967 | 19,600 | Fair |
All bridges nearby: Sequoyah County, OK bridge conditions · every bridge in Sequoyah County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.