29 Mile Road over Salt River
GoodMacomb County, Michigan · 0.3 MI W of Gratiot US-25 · Structure no. 000000000006226
- Built
- 1987
- 38 years old
- Condition
- Good
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 32 ft
- 1 main span
- Daily traffic
- 150
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
29 Mile Road over Salt River is a prestressed concrete stringer/multi-beam or girder carrying 29 Mile Road over Salt River in Macomb County, Michigan. It was built in 1987, so it is 38 years old, younger than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 150 vehicles a day, roughly 2% of them trucks, projected to reach 200 by 2039. The structure is 32 ft (9.8 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 29 Mile Road over Salt River built?
It was built in 1987, making it 38 years old in 2025.
What condition is 29 Mile Road over Salt River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.
How much traffic does 29 Mile Road over Salt River carry?
About 150 vehicles per day (2019 count), of which roughly 2% are trucks.
How long is 29 Mile Road over Salt River?
The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 43 ft wide.
Who owns 29 Mile Road over Salt River?
It is owned by the County Highway Agency.