US 31 NB over S Fork Deer Creek
Miami County, Indiana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 31 NB over S Fork Deer Creek in Miami County, Indiana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 1972 and reconstructed in 2019, making it 53 years old at the 2025 inventory.
- It carries about 10,086 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 62 of the 171 inventoried bridges in Miami County rated good (36.3%); 12 (7.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 2024, on a 24-month routine inspection cycle.
- 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 → (40.56559, -86.12716)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 9 | 9 | Excellent condition |
| Superstructure | 9 | 9 | Excellent condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 104 ft |
| Location | 01.33 S SR 18 |
| NBI structure number | 009810 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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.