Jad Road (old M41) over Carp River
Marquette County, Michigan · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Jad Road (old M41) over Carp River in Marquette County, Michigan, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 2 (critical condition) on the 0-9 scale.
- It was built in 1946, making it 79 years old at the 2025 inventory.
- It carries about 100 vehicles a day (traffic count year 1994).
- Its listed owner is the county highway agency.
- It is one of 19 of the 147 inventoried bridges in Marquette County rated poor (12.9%); 19 (12.9%) 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 → (46.52418, -87.57594)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 2 | Critical condition |
Bridge details
| Structure | Timber slab |
| Length | about 48 ft |
| Location | 0.02 Mi N of US-41 |
| NBI structure number | 000000000006596 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Marquette County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Us-41|m-28 over Carp River | 1936 | 23,600 | Fair |
| US-41 over Carp Creek | 1979 | 14,675 | Good |
| US-41 over Ls&i RR | 1979 | 13,542 | Fair |
| M-28 over Chocolay River | 2005 | 9,335 | Good |
| US-41 NB over Carp River | 1955 | 8,662 | Fair |
| US-41 SB over Carp River | 1958 | 8,662 | Fair |
All bridges nearby: Marquette County, MI bridge conditions · every bridge in Marquette County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.