US Bridges

Seward Highway over Falls Creek

Good

Kenai Peninsula Borough, Alaska · Mile Point 24.8 · Structure no. 0609

Built
2012
13 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
149 ft
1 main span
Daily traffic
1,700
2020 count
Owner
State
State Highway Agency

About this bridge

Seward Highway over Falls Creek is a prestressed concrete tee beam carrying Seward Highway over Falls Creek in Kenai Peninsula Borough, Alaska. It was built in 2012, so it is 13 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,700 vehicles a day, roughly 6% of them trucks, projected to reach 2,210 by 2039. The structure is 149 ft (45.4 m) long and 39 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesSeward Highway
CrossesFalls Creek
LocationMile Point 24.8
RouteState Highway 31
StateAlaska
Coordinates60.43056, -149.37167
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating108.6 US tons
Inventory rating61.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length149 ft (45.4 m)
Longest span145 ft (44.2 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2020)
Projected traffic2,210 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 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 Falls Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is Seward Highway over Falls 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 August 2023.

How much traffic does Seward Highway over Falls Creek carry?

About 1,700 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Seward Highway over Falls Creek?

The structure is 149 ft (45.4 m) long with a longest span of 145 ft (44.2 m) and a deck 39 ft wide.

Who owns Seward Highway over Falls Creek?

It is owned by the State Highway Agency.