Duncan ST over River Raisin
PoorWashtenaw County, Michigan · In Village of Manchester · Structure no. 000000000011083
- Built
- 1970
- 55 years old
- Condition
- Poor
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 49 ft
- 1 main span
- Daily traffic
- 2,300
- 1997 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Duncan ST over River Raisin is a prestressed concrete box beam or girders - multiple carrying Duncan ST over River Raisin in Washtenaw County, Michigan. It was built in 1970, so it is 55 years old, older than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 2,300 vehicles a day, projected to reach 2,300 by 2017. The structure is 49 ft (14.9 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 Duncan ST over River Raisin built?
It was built in 1970, making it 55 years old in 2025.
What condition is Duncan ST over River Raisin in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.
How much traffic does Duncan ST over River Raisin carry?
About 2,300 vehicles per day (1997 count).
How long is Duncan ST over River Raisin?
The structure is 49 ft (14.9 m) long with a longest span of 46 ft (14 m) and a deck 34 ft wide.
Who owns Duncan ST over River Raisin?
It is owned by the City or Municipal Highway Agency.