Gravina Island HWY over Gravina Creek
GoodKetchikan Gateway Borough, Alaska · Mile Point 2.1 · Structure no. 2222
- Built
- 2008
- 17 years old
- Condition
- Good
- inspected June 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 63 ft
- 1 main span
- Daily traffic
- 30
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
Gravina Island HWY over Gravina Creek is a prestressed concrete tee beam carrying Gravina Island HWY over Gravina Creek in Ketchikan Gateway Borough, Alaska. It was built in 2008, so it is 17 years old, younger 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 30 vehicles a day, roughly 1% of them trucks, projected to reach 50 by 2035. The structure is 63 ft (19.2 m) long and 38 ft wide. 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Gravina Island HWY over Gravina Creek built?
It was built in 2008, making it 17 years old in 2025.
What condition is Gravina Island HWY over Gravina 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 June 2023.
How much traffic does Gravina Island HWY over Gravina Creek carry?
About 30 vehicles per day (2018 count), of which roughly 1% are trucks.
How long is Gravina Island HWY over Gravina Creek?
The structure is 63 ft (19.2 m) long with a longest span of 60 ft (18.3 m) and a deck 38 ft wide.
Who owns Gravina Island HWY over Gravina Creek?
It is owned by the State Highway Agency and maintained by the County Highway Agency.