US Bridges

Anton Larsen Bay over Buskin River No 7

FairPosted for load

Kodiak Island Borough, Alaska · Mile Point 1.5 · Structure no. 0988

Built
1960
65 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
93 ft
4 main spans
Daily traffic
380
2020 count
Owner
State
State Highway Agency

About this bridge

Anton Larsen Bay over Buskin River No 7 is a concrete continuous slab carrying Anton Larsen Bay over Buskin River No 7 in Kodiak Island Borough, Alaska. It was built in 1960, so it is 65 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 380 vehicles a day, roughly 6% of them trucks, projected to reach 510 by 2039. The structure is 93 ft (28.2 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesAnton Larsen Bay
CrossesBuskin River No 7
LocationMile Point 1.5
RouteState Highway 391
StateAlaska
Coordinates57.77602, -152.53356
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.5 US tons
Inventory rating26.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length93 ft (28.2 m)
Longest span25 ft (7.6 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic380 (2020)
Projected traffic510 by 2039
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free 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 Anton Larsen Bay over Buskin River No 7 built?

It was built in 1960, making it 65 years old in 2025.

What condition is Anton Larsen Bay over Buskin River No 7 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 September 2024.

How much traffic does Anton Larsen Bay over Buskin River No 7 carry?

About 380 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Anton Larsen Bay over Buskin River No 7?

The structure is 93 ft (28.2 m) long with a longest span of 25 ft (7.6 m) and a deck 27 ft wide.

Who owns Anton Larsen Bay over Buskin River No 7?

It is owned by the State Highway Agency.