CR 489(RED Oak Rd) over Au Sable River
FairOscoda County, Michigan · Sec 2-3 Big Creek Twp · Structure no. 000000000008667
- Built
- 1959
- 66 years old
- Condition
- Fair
- inspected October 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 130 ft
- 4 main spans
- Daily traffic
- 1,540
- 2005 count
- Owner
- County
- County Highway Agency
About this bridge
CR 489(RED Oak Rd) over Au Sable River is a prestressed concrete box beam or girders - multiple carrying CR 489(RED Oak Rd) over Au Sable River in Oscoda County, Michigan. It was built in 1959, so it is 66 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.
It carries about 1,540 vehicles a day, roughly 4% of them trucks, projected to reach 2,800 by 2025. The structure is 130 ft (39.6 m) long and 33 ft wide. If it were closed, the detour would be 14.9 mi (24 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 | 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 CR 489(RED Oak Rd) over Au Sable River built?
It was built in 1959, making it 66 years old in 2025.
What condition is CR 489(RED Oak Rd) over Au Sable 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 October 2024.
How much traffic does CR 489(RED Oak Rd) over Au Sable River carry?
About 1,540 vehicles per day (2005 count), of which roughly 4% are trucks.
How long is CR 489(RED Oak Rd) over Au Sable River?
The structure is 130 ft (39.6 m) long with a longest span of 35 ft (10.7 m) and a deck 33 ft wide.
Who owns CR 489(RED Oak Rd) over Au Sable River?
It is owned by the County Highway Agency.