US Bridges

Seward Highway over Indian Creek

Good

Anchorage Municipality, Alaska · Mile Point 102.1 · Structure no. 0644

Built
2021
4 years old
Condition
Good
inspected June 2023
Type
Tee Beam
Prestressed Concrete
Length
210 ft
3 main spans
Daily traffic
6,860
2020 count
Owner
State
State Highway Agency

About this bridge

Seward Highway over Indian Creek is a prestressed concrete tee beam carrying Seward Highway over Indian Creek in Anchorage Municipality, Alaska. It was built in 2021, so it is 4 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,860 vehicles a day, roughly 12% of them trucks, projected to reach 7,820 by 2039. The structure is 210 ft (64 m) long and 63 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesSeward Highway
CrossesIndian Creek
LocationMile Point 102.1
RouteInterstate 0A31
StateAlaska
Coordinates60.98556, -149.50056
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.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating81.9 US tons
Inventory rating49.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans3
Design loadHL 93
Structure length210 ft (64 m)
Longest span70 ft (21.3 m)
Deck width63 ft (19.1 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,860 (2020)
Projected traffic7,820 by 2039
Trucks12%
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 Seward Highway over Indian Creek built?

It was built in 2021, making it 4 years old in 2025.

What condition is Seward Highway over Indian Creek 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 June 2023.

How much traffic does Seward Highway over Indian Creek carry?

About 6,860 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is Seward Highway over Indian Creek?

The structure is 210 ft (64 m) long with a longest span of 70 ft (21.3 m) and a deck 63 ft wide.

Who owns Seward Highway over Indian Creek?

It is owned by the State Highway Agency.