SR 40 over Big Darby Creek
Madison County, Ohio · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 40 over Big Darby Creek in Madison County, Ohio, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1940 and reconstructed in 1984, making it 85 years old at the 2025 inventory.
- It carries about 9,659 vehicles a day (traffic count year 2015).
- Its listed owner is the state highway agency.
- It is one of 51 of the 200 inventoried bridges in Madison County rated fair (25.5%); 17 (8.5%) are rated poor.
- 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 → (39.94732, -83.23656)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 513 ft |
| Location | 1.98 Mi N of SR142 |
| NBI structure number | 4901029 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Ohio department of transportation.
Busiest bridges in Madison County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-70 over Big Darby Creek | 1970 | 32,533 | Good |
| I-70 over Big Darby Creek | 1970 | 32,533 | Good |
| I-70 over Little Darby Creek | 1969 | 29,528 | Good |
| I-70 over Little Darby Creek | 1969 | 29,528 | Good |
| I-70 over Deer Creek | 1969 | 24,059 | Good |
| I-70 EB over Deer Creek | 1969 | 24,059 | Good |
All bridges nearby: Madison County, OH bridge conditions · every bridge in Madison County · Ohio bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.