Grant Street over Grant Street Viaduct
FairPosted for loadKetchikan Gateway Borough, Alaska · Mile Point 0.1 · Structure no. 0384
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 213 ft
- 21 main spans
- Daily traffic
- 1,016
- 2018 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Grant Street over Grant Street Viaduct is a wood or timber stringer/multi-beam or girder carrying Grant Street over Grant Street Viaduct in Ketchikan Gateway Borough, Alaska. It was built in 1970, so it is 55 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 1,016 vehicles a day, roughly 8% of them trucks, projected to reach 1,100 by 2035. The structure is 213 ft (64.9 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Grant Street over Grant Street Viaduct built?
It was built in 1970, making it 55 years old in 2025.
What condition is Grant Street over Grant Street Viaduct 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 June 2023.
How much traffic does Grant Street over Grant Street Viaduct carry?
About 1,016 vehicles per day (2018 count), of which roughly 8% are trucks.
How long is Grant Street over Grant Street Viaduct?
The structure is 213 ft (64.9 m) long with a longest span of 10 ft (3 m) and a deck 29 ft wide.
Who owns Grant Street over Grant Street Viaduct?
It is owned by the City or Municipal Highway Agency.