21 Mile Road over Middle Br Clinton River
FairMacomb County, Michigan · 0.2 MI E of Romeo Plank · Structure no. 000000000006345
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 105 ft
- 2 main spans
- Daily traffic
- 17,600
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
21 Mile Road over Middle Br Clinton River is a prestressed concrete box beam or girders - multiple carrying 21 Mile Road over Middle Br Clinton River in Macomb County, Michigan. It was built in 1979, so it is 46 years old, younger than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 17,600 vehicles a day, roughly 5% of them trucks, projected to reach 18,600 by 2039. The structure is 105 ft (32 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 21 Mile Road over Middle Br Clinton River built?
It was built in 1979, making it 46 years old in 2025.
What condition is 21 Mile Road over Middle Br Clinton River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.
How much traffic does 21 Mile Road over Middle Br Clinton River carry?
About 17,600 vehicles per day (2019 count), of which roughly 5% are trucks.
How long is 21 Mile Road over Middle Br Clinton River?
The structure is 105 ft (32 m) long with a longest span of 51 ft (15.5 m) and a deck 37 ft wide.
Who owns 21 Mile Road over Middle Br Clinton River?
It is owned by the County Highway Agency.