US Bridges

Sterling Highway over Stariski Creek

Good

Kenai Peninsula Borough, Alaska · Mile Point 111.0 · Structure no. 0667

Built
2007
18 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
131 ft
1 main span
Daily traffic
2,170
2020 count
Owner
State
State Highway Agency

About this bridge

Sterling Highway over Stariski Creek is a prestressed concrete tee beam carrying Sterling Highway over Stariski Creek in Kenai Peninsula Borough, Alaska. It was built in 2007, so it is 18 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 2,170 vehicles a day, roughly 13% of them trucks, projected to reach 2,470 by 2039. The structure is 131 ft (39.9 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesSterling Highway
CrossesStariski Creek
LocationMile Point 111.0
RouteState Highway 21
StateAlaska
Coordinates59.85139, -151.79056
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 protection9 ExcellentNo 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating95.1 US tons
Inventory rating57 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length131 ft (39.9 m)
Longest span127 ft (38.7 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,170 (2020)
Projected traffic2,470 by 2039
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Sterling Highway over Stariski Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Sterling Highway over Stariski 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 Sterling Highway over Stariski Creek carry?

About 2,170 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is Sterling Highway over Stariski Creek?

The structure is 131 ft (39.9 m) long with a longest span of 127 ft (38.7 m) and a deck 43 ft wide.

Who owns Sterling Highway over Stariski Creek?

It is owned by the State Highway Agency.