M-13 & M-84 over E Channel Saginaw River
Bay County, Michigan · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- M-13 & M-84 over E Channel Saginaw River in Bay County, Michigan, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1938 and reconstructed in 2005, making it 87 years old at the 2025 inventory.
- It carries about 16,380 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 27 of the 166 inventoried bridges in Bay County rated poor (16.3%); 27 (16.3%) are rated poor.
- 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 → (43.57969, -83.89898)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 3 | Serious condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Steel movable bascule |
| Length | about 507 ft |
| Location | In Bay City (lafayette Av |
| NBI structure number | 000000000000586 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Bay County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-75 NB over Squaconning Creek | 1960 | 57,600 | Fair |
| I-75 SB over Squaconning Creek | 1960 | 57,600 | Fair |
| I-75 NB over Goetz Drain | 2010 | 53,002 | Good |
| I-75 NB over Hesr | 1960 | 44,350 | Poor |
| US-10 EB over Gtw RR | 1961 | 35,800 | Fair |
| US-10 WB over Gtw RR | 1961 | 35,800 | Fair |
All bridges nearby: Bay County, MI bridge conditions · every bridge in Bay County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.