Chiniak Highway over West Fork Twin Creek
GoodKodiak Island Borough, Alaska · Mile Point 28.5 · Structure no. 4057
- Built
- 1975
- 50 years old
- Condition
- Good
- inspected September 2024
- Type
- Culvert
- Steel
- Length
- 24 ft
- 1 main span
- Daily traffic
- 166
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
Chiniak Highway over West Fork Twin Creek is a steel culvert carrying Chiniak Highway over West Fork Twin Creek in Kodiak Island Borough, Alaska. It was built in 1975, so it is 50 years old, older than the Alaska average of 35.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 166 vehicles a day, roughly 11% of them trucks, projected to reach 300 by 2035. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Chiniak Highway over West Fork Twin Creek built?
It was built in 1975, making it 50 years old in 2025.
What condition is Chiniak Highway over West Fork Twin Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.
How much traffic does Chiniak Highway over West Fork Twin Creek carry?
About 166 vehicles per day (2018 count), of which roughly 11% are trucks.
How long is Chiniak Highway over West Fork Twin Creek?
The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).
Who owns Chiniak Highway over West Fork Twin Creek?
It is owned by the State Highway Agency.