US Bridges

15th Avenue over 15th Avenue Oc a ST

Fair

Anchorage Municipality, Alaska · Mile Point 1.2 · Structure no. 1248

Built
1985
40 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
124 ft
1 main span
Daily traffic
11,800
2020 count
Owner
State
State Highway Agency

About this bridge

15th Avenue over 15th Avenue Oc a ST is a prestressed concrete tee beam carrying 15th Avenue over 15th Avenue Oc a ST in Anchorage Municipality, Alaska. It was built in 1985, so it is 40 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 11,800 vehicles a day, roughly 4% of them trucks, projected to reach 14,500 by 2039. The structure is 124 ft (37.8 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries15th Avenue
Crosses15th Avenue Oc a ST
LocationMile Point 1.2
RouteState Highway 527
CountyAnchorage Municipality
StateAlaska
Coordinates61.20778, -149.88306
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.2 US tons
Inventory rating27.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length124 ft (37.8 m)
Longest span122 ft (37.2 m)
Deck width61 ft (18.7 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,800 (2020)
Projected traffic14,500 by 2039
Trucks4%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 15th Avenue over 15th Avenue Oc a ST built?

It was built in 1985, making it 40 years old in 2025.

What condition is 15th Avenue over 15th Avenue Oc a ST 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 August 2023.

How much traffic does 15th Avenue over 15th Avenue Oc a ST carry?

About 11,800 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is 15th Avenue over 15th Avenue Oc a ST?

The structure is 124 ft (37.8 m) long with a longest span of 122 ft (37.2 m) and a deck 61 ft wide.

Who owns 15th Avenue over 15th Avenue Oc a ST?

It is owned by the State Highway Agency.