US-23 SB over Huron River Drive
PoorWashtenaw County, Michigan · 0.8 MI N of M-17 · Structure no. 000000000010870
- Built
- 1962
- 63 years old
- Condition
- Poor
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 109 ft
- 3 main spans
- Daily traffic
- 37,373
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
US-23 SB over Huron River Drive is a prestressed concrete stringer/multi-beam or girder carrying US-23 SB over Huron River Drive in Washtenaw County, Michigan. It was built in 1962, so it is 63 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 37,373 vehicles a day, roughly 9% of them trucks, projected to reach 36,802 by 2018. The structure is 109 ft (33.2 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US-23 SB over Huron River Drive built?
It was built in 1962, making it 63 years old in 2025.
What condition is US-23 SB over Huron River Drive 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 US-23 SB over Huron River Drive carry?
About 37,373 vehicles per day (2007 count), of which roughly 9% are trucks.
How long is US-23 SB over Huron River Drive?
The structure is 109 ft (33.2 m) long with a longest span of 41 ft (12.5 m) and a deck 48 ft wide.
Who owns US-23 SB over Huron River Drive?
It is owned by the State Highway Agency.