Willow Brook Road over Sauk River
Branch County, Michigan · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Willow Brook Road over Sauk River in Branch County, Michigan, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1964, making it 61 years old at the 2025 inventory.
- It carries about 420 vehicles a day (traffic count year 2004).
- Its listed owner is the county highway agency.
- It is one of 26 of the 118 inventoried bridges in Branch County rated poor (22.0%); 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 October 2024, on a 12-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (41.92453, -84.97108)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 4 | 4 | Poor condition |
Bridge details
| Structure | Timber culvert |
| Length | about 21 ft |
| Location | Coldwater Twp Sec 26 |
| NBI structure number | 000000000012808 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 12 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 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.