US Bridges

Alaska Highway over Tanana River

Good

Southeast Fairbanks Census Area, Alaska · Mile Point 79.1 · Structure no. 0505

Built
2010
15 years old
Condition
Good
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
903 ft
6 main spans
Daily traffic
250
2020 count
Owner
State
State Highway Agency

About this bridge

Alaska Highway over Tanana River is a prestressed concrete tee beam carrying Alaska Highway over Tanana River in Southeast Fairbanks 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 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 250 vehicles a day, roughly 28% of them trucks, projected to reach 340 by 2039. The structure is 903 ft (275.1 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesAlaska Highway
CrossesTanana River
LocationMile Point 79.1
RouteInterstate 0A11
StateAlaska
Coordinates63.31716, -142.64688
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating105.7 US tons
Inventory rating63.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans6
Design loadHL 93
Structure length903 ft (275.1 m)
Longest span150 ft (45.7 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2020)
Projected traffic340 by 2039
Trucks28%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Alaska Highway over Tanana River built?

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

What condition is Alaska Highway over Tanana River 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 July 2024.

How much traffic does Alaska Highway over Tanana River carry?

About 250 vehicles per day (2020 count), of which roughly 28% are trucks.

How long is Alaska Highway over Tanana River?

The structure is 903 ft (275.1 m) long with a longest span of 150 ft (45.7 m) and a deck 43 ft wide.

Who owns Alaska Highway over Tanana River?

It is owned by the State Highway Agency.