SR 431 Ramp SB over US 31 & NB Off Ramp
Hamilton County, Indiana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 431 Ramp SB over US 31 & NB Off Ramp in Hamilton County, Indiana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2012, making it 13 years old at the 2025 inventory.
- It carries about 12,640 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 315 of the 460 inventoried bridges in Hamilton County rated good (68.5%); 11 (2.4%) 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 → (39.99559, -86.12625)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 8 | Very good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 385 ft |
| Location | 0.27 S 146th ST |
| NBI structure number | 080458 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Indiana department of transportation.
Busiest bridges in Hamilton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-465 over Monon Greenway | 2010 | 129,425 | Good |
| 96TH St East over White River | 1996 | 80,300 | Fair |
| US 31 over Stanbrough Creek | 2014 | 75,763 | Good |
| US 31 NB over Unt Cool Creek | 2014 | 75,763 | Good |
| US 31 SB over Unt Cool Creek | 2014 | 75,763 | Good |
| US 31 NB over 151ST Street | 2013 | 75,763 | Good |
All bridges nearby: Hamilton County, IN bridge conditions · every bridge in Hamilton County · Indiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.