Coster Road over Manistee River
FairKalkaska County, Michigan · 11 MI S Ofso Boardman · Structure no. 000000000004699
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected August 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 138 ft
- 3 main spans
- Daily traffic
- 290
- 2006 count
- Owner
- County
- County Highway Agency
About this bridge
Coster Road over Manistee River is a prestressed concrete box beam or girders - multiple carrying Coster Road over Manistee River in Kalkaska County, Michigan. It was built in 1977, so it is 48 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 6 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 290 vehicles a day, roughly 10% of them trucks, projected to reach 520 by 2026. The structure is 138 ft (42 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Coster Road over Manistee River built?
It was built in 1977, making it 48 years old in 2025.
What condition is Coster Road over Manistee 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 August 2024.
How much traffic does Coster Road over Manistee River carry?
About 290 vehicles per day (2006 count), of which roughly 10% are trucks.
How long is Coster Road over Manistee River?
The structure is 138 ft (42 m) long with a longest span of 46 ft (14 m) and a deck 30 ft wide.
Who owns Coster Road over Manistee River?
It is owned by the County Highway Agency.