Porter Street over Tobacco River
FairPosted for loadGladwin County, Michigan · 0.1 Miles East of M-18 · Structure no. 000000000002942
- Built
- 1917
- 108 years old, rebuilt 1959
- Condition
- Fair
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 198 ft
- 4 main spans
- Daily traffic
- 1,470
- 2017 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Porter Street over Tobacco River is a prestressed concrete box beam or girders - multiple carrying Porter Street over Tobacco River in Gladwin County, Michigan. It was built in 1917 and reconstructed in 1959, so it is 108 years old, older 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 1,470 vehicles a day, roughly 5% of them trucks, projected to reach 2,185 by 2037. The structure is 198 ft (60.5 m) long and 31 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Porter Street over Tobacco River built?
It was built in 1917, making it 108 years old in 2025. It was reconstructed in 1959.
What condition is Porter Street over Tobacco 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 June 2024.
How much traffic does Porter Street over Tobacco River carry?
About 1,470 vehicles per day (2017 count), of which roughly 5% are trucks.
How long is Porter Street over Tobacco River?
The structure is 198 ft (60.5 m) long with a longest span of 51 ft (15.5 m) and a deck 31 ft wide.
Who owns Porter Street over Tobacco River?
It is owned by the City or Municipal Highway Agency.