66th Street over M Br Black River
FairPosted for loadAllegan County, Michigan · S of 103rd Ave · Structure no. 000000000000190
- Built
- 1949
- 76 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 65 ft
- 1 main span
- Daily traffic
- 1,133
- 2003 count
- Owner
- County
- County Highway Agency
About this bridge
66th Street over M Br Black River is a steel stringer/multi-beam or girder carrying 66th Street over M Br Black River in Allegan County, Michigan. It was built in 1949, so it is 76 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 1,133 vehicles a day, roughly 7% of them trucks, projected to reach 2,266 by 2023. The structure is 65 ft (19.8 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 66th Street over M Br Black River built?
It was built in 1949, making it 76 years old in 2025.
What condition is 66th Street over M Br Black 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 September 2023.
How much traffic does 66th Street over M Br Black River carry?
About 1,133 vehicles per day (2003 count), of which roughly 7% are trucks.
How long is 66th Street over M Br Black River?
The structure is 65 ft (19.8 m) long with a longest span of 64 ft (19.4 m) and a deck 30 ft wide.
Who owns 66th Street over M Br Black River?
It is owned by the County Highway Agency.