Chiniak Highway over American River
FairKodiak Island Borough, Alaska · Mile Point 9.4 · Structure no. 0284
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 157 ft
- 5 main spans
- Daily traffic
- 600
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Chiniak Highway over American River is a prestressed concrete tee beam carrying Chiniak Highway over American River in Kodiak Island Borough, Alaska. It was built in 1974, so it is 51 years old, older than the Alaska average of 35.9 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 600 vehicles a day, roughly 15% of them trucks, projected to reach 1,200 by 2039. The structure is 157 ft (47.8 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Chiniak Highway over American River built?
It was built in 1974, making it 51 years old in 2025.
What condition is Chiniak Highway over American 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 September 2024.
How much traffic does Chiniak Highway over American River carry?
About 600 vehicles per day (2020 count), of which roughly 15% are trucks.
How long is Chiniak Highway over American River?
The structure is 157 ft (47.8 m) long with a longest span of 31 ft (9.4 m) and a deck 28 ft wide.
Who owns Chiniak Highway over American River?
It is owned by the State Highway Agency.