US 31 NB over Amity Ditch
Johnson County, Indiana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 31 NB over Amity Ditch in Johnson County, Indiana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1950 and reconstructed in 2020, making it 75 years old at the 2025 inventory.
- It carries about 5,716 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 92 of the 230 inventoried bridges in Johnson County rated good (40.0%); 23 (10.0%) 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 → (39.42707, -86.00393)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 38 ft |
| Location | 01.14 N SR 252 |
| NBI structure number | 009350 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Indiana department of transportation.
Busiest bridges in Johnson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-65 over Drainage Ditch | 1971 | 92,074 | Good |
| I-65 over Drainage Ditch | 1969 | 55,807 | Fair |
| SR 37 Sbl over Bluff Creek | 2023 | 47,800 | Good |
| SR 37 Nbsb over North Bluff Creek | 2022 | 47,800 | Good |
| I-65 NB over Hurricane Creek | 2017 | 38,171 | Good |
| I-65 NB over Greenwood RD/950 N | 2016 | 37,414 | Good |
All bridges nearby: Johnson County, IN bridge conditions · every bridge in Johnson County · Indiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.