I-275 SB over Tonquish CR
GoodWayne County, Michigan · 3.5 MI SE of Plymouth · Structure no. 000000000011954
- Built
- 1972
- 53 years old
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 35 ft
- 1 main span
- Daily traffic
- 63,759
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
I-275 SB over Tonquish CR is a prestressed concrete stringer/multi-beam or girder carrying I-275 SB over Tonquish CR in Wayne County, Michigan. It was built in 1972, so it is 53 years old, older 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 63,759 vehicles a day, roughly 7% of them trucks, projected to reach 70,250 by 2042. The structure is 35 ft (10.7 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 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 I-275 SB over Tonquish CR built?
It was built in 1972, making it 53 years old in 2025.
What condition is I-275 SB over Tonquish CR 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 October 2024.
How much traffic does I-275 SB over Tonquish CR carry?
About 63,759 vehicles per day (2007 count), of which roughly 7% are trucks.
How long is I-275 SB over Tonquish CR?
The structure is 35 ft (10.7 m) long with a longest span of 31 ft (9.6 m) and a deck 56 ft wide.
Who owns I-275 SB over Tonquish CR?
It is owned by the State Highway Agency.