Bridge conditions in Seminole County, Oklahoma
298 inventoried bridges · 36 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Seminole County has 36 bridges rated poor out of 298 inventoried, a 12.1% share that puts it well above the national rate of about 7%.
- 36 of the 298 bridges in Seminole County, Oklahoma, are rated in poor condition (12.1%) in the 2025 National Bridge Inventory, as of .
- 108 bridges (36.2%) are rated good and 154 (51.7%) fair.
- The median Seminole County bridge was built in 1963.
- The busiest poor-rated bridge is U.S. 270 over Creek (built 1943), carrying about 7,400 vehicles a day.
Good 36.2% · Fair 51.7% · Poor 12.1% of 298 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
Busiest bridges in the 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 |
| S.H. 9 over Magnolia Creek | 1965 | 9,800 | Fair |
| I-40 over Co. Rd. Under | 1963 | 8,900 | Good |
| I-40 over Co. Rd. Under | 1963 | 8,900 | Fair |
| I-40 over Creek | 1963 | 8,900 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
Every bridge in Seminole County → - all 298, busiest first, each with its own condition record.
All of Oklahoma: Oklahoma bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.