N3520 over Creek
Seminole County, Oklahoma · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N3520 over Creek in Seminole County, Oklahoma, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1976, making it 49 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 154 of the 298 inventoried bridges in Seminole County rated fair (51.7%); 36 (12.1%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 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 → (35.16066, -96.74032)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 30 ft |
| Location | 2.1 N & 2 E of Maud |
| NBI structure number | 191410000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | July 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 Seminole County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-40 over Creek | 1963 | 15,100 | Fair |
| I-40 over Creek | 1963 | 15,100 | Fair |
| I-40 over Creek | 1964 | 14,800 | Good |
| S.H. 99 over Magnolia Creek | 1965 | 14,400 | Good |
| Old U.S. 270 over Magnolia Creek | 2020 | 10,400 | Good |
| S.H. 9 over Carter Creek | 2011 | 10,000 | Fair |
All bridges nearby: Seminole County, OK bridge conditions · every bridge in Seminole County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.