US Bridges

A ST over Chester Creek

Fair

Anchorage Municipality, Alaska · Anchorage · Structure no. 1629

Built
1985
40 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
120 ft
1 main span
Daily traffic
10,700
2020 count
Owner
State
State Highway Agency

About this bridge

A ST over Chester Creek is a prestressed concrete tee beam carrying A ST over Chester Creek 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 10,700 vehicles a day, roughly 5% of them trucks, projected to reach 24,000 by 2039. The structure is 120 ft (36.6 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesA ST
CrossesChester Creek
LocationAnchorage
RouteState Highway 527
StateAlaska
Coordinates61.20333, -149.88306
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.3 US tons
Inventory rating34.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span118 ft (36 m)
Deck width61 ft (18.7 m)
Roadway width60 ft (18.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,700 (2020)
Projected traffic24,000 by 2039
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 A ST over Chester Creek built?

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

What condition is A ST over Chester Creek 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 A ST over Chester Creek carry?

About 10,700 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is A ST over Chester Creek?

The structure is 120 ft (36.6 m) long with a longest span of 118 ft (36 m) and a deck 61 ft wide.

Who owns A ST over Chester Creek?

It is owned by the State Highway Agency.