Wood Bush Road over Traprock River
Houghton County, Michigan · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Wood Bush Road over Traprock River in Houghton County, Michigan, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1900, making it 125 years old at the 2025 inventory.
- It carries about 80 vehicles a day (traffic count year 1993).
- Its listed owner is the county highway agency.
- It is one of 2 of the 59 inventoried bridges in Houghton County rated poor (3.4%); 2 (3.4%) 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 → (47.27157, -88.36059)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 5 | Fair condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Concrete slab |
| Length | about 23 ft |
| Location | .75 Mi S 1.25 Mi E Copper |
| NBI structure number | 000000000003424 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Houghton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Us-41&m-26 Rr(abn) over Portage Lake & EB M-26 | 1960 | 24,754 | Fair |
| US-41 over Pilgrim River | 1916 | 5,543 | Fair |
| M-26 over Quincy Creek | 2021 | 5,200 | Good |
| US-41 over Sturgeon River Slough | 1956 | 3,985 | Fair |
| US-41 over Snake River | 1934 | 3,883 | Fair |
| US-41 over Backwater Portage River | 1929 | 3,883 | Fair |
All bridges nearby: Houghton County, MI bridge conditions · every bridge in Houghton County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.