US 31 SB over Old US 24 NS RR
Miami County, Indiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 31 SB over Old US 24 NS RR in Miami County, Indiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1963 and reconstructed in 2001, making it 62 years old at the 2025 inventory.
- It carries about 9,762 vehicles a day (traffic count year 2018).
- Its listed owner is the state highway agency.
- It is one of 97 of the 171 inventoried bridges in Miami County rated fair (56.7%); 12 (7.0%) 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 → (40.75179, -86.1278)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 245 ft |
| Location | 01.47 S US 24 |
| NBI structure number | 009910 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Indiana department of transportation.
Busiest bridges in Miami County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 31 over William H. Russell Creek | 2023 | 29,246 | Good |
| US 24 over Drainage Ditch | 1976 | 12,472 | Fair |
| US 31 NB over Big Pipe Creek | 1956 | 11,773 | Good |
| US 31 SB over Big Pipe Creek | 1972 | 11,773 | Good |
| US 31 NB over Deer Creek | 1972 | 11,648 | Fair |
| US 31 SB over Deer Creek | 1972 | 11,648 | Fair |
All bridges nearby: Miami County, IN bridge conditions · every bridge in Miami County · Indiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.