US Bridges

Parks Highway over Antler Creek

Fair

Denali Borough, Alaska · Mile Point 209.1 · Structure no. 1141

Built
1969
56 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
219 ft
3 main spans
Daily traffic
1,380
2020 count
Owner
State
State Highway Agency

About this bridge

Parks Highway over Antler Creek is a steel stringer/multi-beam or girder carrying Parks Highway over Antler Creek in Denali Borough, Alaska. It was built in 1969, so it is 56 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.

It carries about 1,380 vehicles a day, roughly 7% of them trucks, projected to reach 2,100 by 2039. The structure is 219 ft (66.9 m) long and 34 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesParks Highway
CrossesAntler Creek
LocationMile Point 209.1
RouteInterstate 0A44
StateAlaska
Coordinates63.81554, -148.97611
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94.1 US tons
Inventory rating43.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length219 ft (66.9 m)
Longest span72 ft (21.9 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,380 (2020)
Projected traffic2,100 by 2039
Trucks7%
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 Parks Highway over Antler Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Parks Highway over Antler 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 July 2024.

How much traffic does Parks Highway over Antler Creek carry?

About 1,380 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Parks Highway over Antler Creek?

The structure is 219 ft (66.9 m) long with a longest span of 72 ft (21.9 m) and a deck 34 ft wide.

Who owns Parks Highway over Antler Creek?

It is owned by the State Highway Agency.