US-12 over Swan Creek
Branch County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US-12 over Swan Creek in Branch County, Michigan, 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 2016, making it 9 years old at the 2025 inventory.
- It carries about 5,850 vehicles a day (traffic count year 2016).
- Its listed owner is the state highway agency.
- It is one of 22 of the 118 inventoried bridges in Branch County rated good (18.6%); 26 (22.0%) 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 May 2023, 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 → (41.89174, -85.15197)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete single box beam |
| Length | about 54 ft |
| Location | 2.7 Mi NE of Bronson |
| NBI structure number | 000000000001065 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2023 |
| 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 Michigan department of transportation.
Busiest bridges in Branch County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-69 over Cold Creek | 1967 | 20,204 | Fair |
| I-69 SB over Sauk River | 1967 | 17,675 | Fair |
| I-69 NB over Sauk River | 1967 | 17,675 | Fair |
| I-69 SB over Hog Creek | 1967 | 10,926 | Fair |
| I-69 NB over Hog Creek | 1967 | 10,926 | Fair |
| I-69 SB over Indiana NE RR Sauk R Rd | 1967 | 10,583 | Fair |
All bridges nearby: Branch County, MI bridge conditions · every bridge in Branch County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.