SR 231 over over US-23
Marion County, Ohio · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 231 over over US-23 in Marion County, Ohio, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1968, making it 57 years old at the 2025 inventory.
- It carries about 1,476 vehicles a day (traffic count year 2015).
- Its listed owner is the state highway agency.
- It is one of 9 of the 230 inventoried bridges in Marion County rated poor (3.9%); 9 (3.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated good in the 2024 inventory and is now poor (deck 7 to 6, superstructure 7 to 4).
- Its most recent inspection on record is dated October 2024, on a 12-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (40.69147, -83.15018)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 6 | Satisfactory condition |
| Superstructure | 7 | 4 | Poor condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 234 ft |
| Location | 0.30 Mi E of SR423 |
| NBI structure number | 5103215 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Ohio department of transportation.
Busiest bridges in Marion County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 95 over Graves Creek | 1965 | 23,882 | Fair |
| SR 309 over Grave Creek | 1998 | 13,059 | Good |
| US 23 over over Sr98-0011 | 1965 | 11,517 | Good |
| US 23 over over Sr98-0013 | 1965 | 11,517 | Good |
| US 23 over Cauquaw CR | 1965 | 11,517 | Good |
| US 23 over Cauquaw CR | 1965 | 11,517 | Good |
All bridges nearby: Marion County, OH bridge conditions · every bridge in Marion County · Ohio bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.