South Michigan St over Yellow River
Marshall County, Indiana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- South Michigan St over Yellow River in Marshall County, Indiana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1917 and reconstructed in 2008, making it 108 years old at the 2025 inventory.
- It carries about 10,525 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 75 of the 183 inventoried bridges in Marshall County rated fair (41.0%); 6 (3.3%) 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 October 2024, on a 24-month routine inspection cycle.
- 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 → (41.3395, -86.30888)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete deck arch |
| Length | about 129 ft |
| Location | 00.10 N of Lake Street |
| NBI structure number | 5000002 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Indiana department of transportation.
Busiest bridges in Marshall County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Veterans Parkway over Elmer Seltenright Ditch | 2015 | 18,350 | Good |
| US 31 NB over Yellow River | 1960 | 14,402 | Fair |
| US 31 SB over Yellow River | 1960 | 14,402 | Good |
| US 30 EB over Western Avenue | 1964 | 14,007 | Fair |
| US 30 WB over Western Avenue | 1964 | 14,007 | Fair |
| US 6 over Br. Marberger Ditch | 1978 | 10,176 | Fair |
All bridges nearby: Marshall County, IN bridge conditions · every bridge in Marshall County · Indiana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.