I-40 over S.H. 18 Under
Pottawatomie County, Oklahoma · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-40 over S.H. 18 Under in Pottawatomie County, Oklahoma, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1997, making it 28 years old at the 2025 inventory.
- It carries about 11,000 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 87 of the 408 inventoried bridges in Pottawatomie County rated good (21.3%); 25 (6.1%) 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 good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (35.38372, -96.91249)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 238 ft |
| Location | Jct SH 18 |
| NBI structure number | 244670000000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 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 Pottawatomie County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-40 WB over Old U.S. 270 Under | 2018 | 38,000 | Good |
| I-40 EB over Old U.S. 270 Under | 2018 | 38,000 | Good |
| I-40 over Creek | 1961 | 34,400 | Fair |
| I-40 over Deer Creek | 2007 | 34,400 | Good |
| I-40 over Creek | 1962 | 27,900 | Fair |
| I-40 over Creek | 1963 | 20,500 | Fair |
All bridges nearby: Pottawatomie County, OK bridge conditions · every bridge in Pottawatomie County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.