Route 499 over Sturgeon River
FairPosted for loadDelta County, Michigan · .2 MI W of Nahma · Structure no. 000000000002128
- Built
- 1985
- 40 years old
- Condition
- Fair
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 104 ft
- 2 main spans
- Daily traffic
- 81
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Route 499 over Sturgeon River is a prestressed concrete box beam or girders - multiple carrying Route 499 over Sturgeon River in Delta County, Michigan. It was built in 1985, so it is 40 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. Its operating status is: posted for load restriction.
It carries about 81 vehicles a day, roughly 5% of them trucks, projected to reach 90 by 2041. The structure is 104 ft (31.7 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Route 499 over Sturgeon River built?
It was built in 1985, making it 40 years old in 2025.
What condition is Route 499 over Sturgeon River 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 July 2023.
How much traffic does Route 499 over Sturgeon River carry?
About 81 vehicles per day (2021 count), of which roughly 5% are trucks.
How long is Route 499 over Sturgeon River?
The structure is 104 ft (31.7 m) long with a longest span of 50 ft (15.3 m) and a deck 34 ft wide.
Who owns Route 499 over Sturgeon River?
It is owned by the County Highway Agency.