M-26 over Silver River
Keweenaw County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- M-26 over Silver River in Keweenaw County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2023, making it 2 years old at the 2025 inventory.
- It carries about 1,100 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 4 of the 12 inventoried bridges in Keweenaw County rated good (33.3%); 1 (8.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: deck 9 to 8, superstructure 9 to 8.
- Its most recent inspection on record is dated August 2024, 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 → (47.4629, -88.07241)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 9 | 8 | Very good condition |
| Superstructure | 9 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 53 ft |
| Location | 4.0 Mi N of Eagle River |
| NBI structure number | 000000000005264 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 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 Keweenaw County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-41 M-26 over Gratiot River | 1953 | 3,430 | Good |
| US-41 over East Branch Eagle River | 1932 | 1,399 | Fair |
| US-41 over Fanny Hooe Creek | 1928 | 899 | Fair |
| M-26 over Central Creek | 1988 | 849 | Fair |
| M-26 over Eagle River | 1987 | 849 | Fair |
| M-26 over Owls Creek Buried | 1948 | 849 | Good |
All bridges nearby: Keweenaw County, MI bridge conditions · every bridge in Keweenaw County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.