Werth Road over Mud Creek
Alpena County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Werth Road over Mud Creek in Alpena County, Michigan, 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 2019, making it 6 years old at the 2025 inventory.
- It carries about 5,325 vehicles a day (traffic count year 2017).
- Its listed owner is the county highway agency.
- It is one of 11 of the 32 inventoried bridges in Alpena County rated good (34.4%); 2 (6.2%) are rated poor.
- 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 → (45.03336, -83.48337)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 48 ft |
| Location | 1.5 Mi SW of Alpena |
| NBI structure number | 000000000000342 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Alpena County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-23 over Thunder Bay River | 1932 | 16,200 | Fair |
| Second Avenue over Thunder Bay River | 1939 | 15,700 | Fair |
| Bagley Street over Thunder Bay River | 2021 | 15,000 | Good |
| US-23 over S Br Devil River | 1936 | 5,537 | Fair |
| US-23 over N Br Devil River | 1933 | 5,537 | Fair |
| M-32 over Bean Creek | 1934 | 5,505 | Fair |
All bridges nearby: Alpena County, MI bridge conditions · every bridge in Alpena County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.