Mohrmann Bridge Rd over Hanley Creek
Antrim County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mohrmann Bridge Rd over Hanley Creek in Antrim County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1976, making it 49 years old at the 2025 inventory.
- It carries about 150 vehicles a day (traffic count year 1997).
- Its listed owner is the county highway agency.
- It is one of 6 of the 15 inventoried bridges in Antrim County rated fair (40.0%); 2 (13.3%) are rated poor.
- 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 → (45.09644, -85.25736)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 51 ft |
| Location | 2 Mi N of Central Lake |
| NBI structure number | 000000000000367 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Antrim County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-31 over Elk River | 1953 | 11,959 | Fair |
| M-88|n Bridge St over Intermediate River | 1931 | 5,984 | Fair |
| Derenzy Road over Cedar River | 1988 | 3,150 | Good |
| Cayuga Street over Intermediate River | 1977 | 3,000 | Poor |
| Route 593 over Torch River | 1971 | 2,040 | Fair |
| Route 593 over Clam Lake | 1958 | 1,400 | Fair |
All bridges nearby: Antrim County, MI bridge conditions · every bridge in Antrim County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.