M-21 over Lewis Drain
GoodShiawassee County, Michigan · 1.4 MI E of Clinton Col · Structure no. 000000000009771
- Built
- 1998
- 27 years old
- Condition
- Good
- inspected July 2023
- Type
- Culvert
- Concrete
- Length
- 22 ft
- 1 main span
- Daily traffic
- 6,438
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
M-21 over Lewis Drain is a concrete culvert carrying M-21 over Lewis Drain in Shiawassee County, Michigan. It was built in 1998, so it is 27 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 6,438 vehicles a day, roughly 8% of them trucks, projected to reach 7,267 by 2018. The structure is 22 ft (6.6 m) long. If it were closed, the detour would be 1.9 mi (3 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was M-21 over Lewis Drain built?
It was built in 1998, making it 27 years old in 2025.
What condition is M-21 over Lewis Drain 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 July 2023.
How much traffic does M-21 over Lewis Drain carry?
About 6,438 vehicles per day (2007 count), of which roughly 8% are trucks.
How long is M-21 over Lewis Drain?
The structure is 22 ft (6.6 m) long with a longest span of 20 ft (6.1 m).
Who owns M-21 over Lewis Drain?
It is owned by the State Highway Agency.