M-99 SB over Skinner Drain
FairEaton County, Michigan · 1.5 MI S of Holt RD · Structure no. 000000000002306
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 30 ft
- 1 main span
- Daily traffic
- 4,238
- 2007 count
- Owner
- State
- State Highway Agency
About this bridge
M-99 SB over Skinner Drain is a steel stringer/multi-beam or girder carrying M-99 SB over Skinner Drain in Eaton County, Michigan. It was built in 1978, so it is 47 years old, younger than the Michigan average of 48.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 4,238 vehicles a day, roughly 4% of them trucks, projected to reach 5,508 by 2018. The structure is 30 ft (9.2 m) long and 58 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was M-99 SB over Skinner Drain built?
It was built in 1978, making it 47 years old in 2025.
What condition is M-99 SB over Skinner Drain in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.
How much traffic does M-99 SB over Skinner Drain carry?
About 4,238 vehicles per day (2007 count), of which roughly 4% are trucks.
How long is M-99 SB over Skinner Drain?
The structure is 30 ft (9.2 m) long with a longest span of 28 ft (8.6 m) and a deck 58 ft wide.
Who owns M-99 SB over Skinner Drain?
It is owned by the State Highway Agency.