SR 46 over Big Slough Creek
Clay County, Indiana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 46 over Big Slough Creek in Clay 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 1996, making it 29 years old at the 2025 inventory.
- It carries about 3,903 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 64 of the 185 inventoried bridges in Clay County rated good (34.6%); 19 (10.3%) 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 February 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 → (39.38992, -87.23123)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 81 ft |
| Location | 04.04 E SR 159 |
| NBI structure number | 016980 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 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 Clay County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-70 EB over Birch Creek | 1966 | 30,165 | Fair |
| SR 42 over East Fork Honey Creek | 1934 | 29,657 | Good |
| SR 42 over I-70 WB | 1967 | 29,657 | Fair |
| I-70 WB over Honey Creek Priv Rd | 1967 | 16,016 | Fair |
| I-70 EB over Honey Creek Priv Rd | 1967 | 15,522 | Fair |
| I-70 EB over East Fork Birch Creek | 1966 | 15,050 | Fair |
All bridges nearby: Clay County, IN bridge conditions · every bridge in Clay County · Indiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.