S.H. 99 over Magnolia Creek
Seminole County, Oklahoma · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- S.H. 99 over Magnolia Creek in Seminole County, Oklahoma, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1965, making it 60 years old at the 2025 inventory.
- It carries about 14,400 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 108 of the 298 inventoried bridges in Seminole County rated good (36.2%); 36 (12.1%) are rated poor.
- 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 → (35.24079, -96.67125)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 75 ft |
| Location | 1.2 Mi N Jct US 270 |
| NBI structure number | 164510000000000 |
| Condition class | Good |
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 |
| Old U.S. 270 over Magnolia Creek | 2020 | 10,400 | Good |
| S.H. 9 over Carter Creek | 2011 | 10,000 | Fair |
| S.H. 9 over Magnolia Creek | 1965 | 9,800 | 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.