Decker Road over S Br Lincoln River
Mason County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Decker Road over S Br Lincoln River in Mason County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 2017, making it 8 years old at the 2025 inventory.
- It carries about 547 vehicles a day (traffic count year 2017).
- Its listed owner is the county highway agency.
- It is one of 21 of the 66 inventoried bridges in Mason County rated good (31.8%); 4 (6.1%) 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 → (43.99038, -86.2002)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 21 ft |
| Location | 2.5 Mi N 1 Mi E of Custer |
| NBI structure number | 000000000006680 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Mason County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Old US-31 over CSX RR | 1935 | 11,200 | Good |
| Old US-31 over Durham Creek | 1925 | 8,600 | Fair |
| Old US-31 over Pere Marquette River | 1925 | 7,076 | Fair |
| Old US-31 over Pere Marquette River | 1924 | 6,828 | Fair |
| US-31 over S Br Lincoln River | 1992 | 6,578 | Fair |
| US-31 over N Br Lincoln River | 1992 | 6,578 | Fair |
All bridges nearby: Mason County, MI bridge conditions · every bridge in Mason County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.