M-20 over Chippewa River
GoodIsabella County, Michigan · In Mt Pleasant · Structure no. 000000000004265
- Built
- 1996
- 29 years old
- Condition
- Good
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 130 ft
- 1 main span
- Daily traffic
- 10,842
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
M-20 over Chippewa River is a prestressed concrete stringer/multi-beam or girder carrying M-20 over Chippewa River in Isabella County, Michigan. It was built in 1996, so it is 29 years old, younger 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 10,842 vehicles a day, roughly 3% of them trucks, projected to reach 17,709 by 2018. The structure is 130 ft (39.6 m) long and 65 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 | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was M-20 over Chippewa River built?
It was built in 1996, making it 29 years old in 2025.
What condition is M-20 over Chippewa River 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 March 2023.
How much traffic does M-20 over Chippewa River carry?
About 10,842 vehicles per day (2007 count), of which roughly 3% are trucks.
How long is M-20 over Chippewa River?
The structure is 130 ft (39.6 m) long with a longest span of 126 ft (38.3 m) and a deck 65 ft wide.
Who owns M-20 over Chippewa River?
It is owned by the State Highway Agency.