US Bridges

State Dock Road over Gustavus Dock

Good

Hoonah-Angoon Census Area, Alaska · Mile Point 1.4 · Structure no. 1417

Built
2010
15 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
1,024 ft
1 main span
Daily traffic
710
2020 count
Owner
State
State Highway Agency

About this bridge

State Dock Road over Gustavus Dock is a steel stringer/multi-beam or girder carrying State Dock Road over Gustavus Dock in Hoonah-Angoon Census Area, Alaska. It was built in 2010, so it is 15 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 710 vehicles a day, roughly 5% of them trucks, projected to reach 870 by 2039. The structure is 1,024 ft (312.1 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesState Dock Road
CrossesGustavus Dock
LocationMile Point 1.4
RouteState Highway NSPCY
CountyHoonah-Angoon Census Area
StateAlaska
Coordinates58.39038, -135.72963
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans1 (+14 approach)
Design loadHS 20
Structure length1,024 ft (312.1 m)
Longest span127 ft (38.7 m)
Deck width24 ft (7.2 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic710 (2020)
Projected traffic870 by 2039
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a toll road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Dock Road over Gustavus Dock built?

It was built in 2010, making it 15 years old in 2025.

What condition is State Dock Road over Gustavus Dock 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 May 2023.

How much traffic does State Dock Road over Gustavus Dock carry?

About 710 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is State Dock Road over Gustavus Dock?

The structure is 1,024 ft (312.1 m) long with a longest span of 127 ft (38.7 m) and a deck 24 ft wide.

Who owns State Dock Road over Gustavus Dock?

It is owned by the State Highway Agency.