US Bridges

Sterling Highway over Sterling Wildlife UP 2

Good

Kenai Peninsula Borough, Alaska · Mile Point 37.2 · Structure no. 4114

Built
2018
7 years old
Condition
Good
inspected August 2023
Type
Culvert
Steel
Length
64 ft
1 main span
Daily traffic
3,180
2020 count
Owner
State
State Highway Agency

About this bridge

Sterling Highway over Sterling Wildlife UP 2 is a steel culvert carrying Sterling Highway over Sterling Wildlife UP 2 in Kenai Peninsula Borough, Alaska. It was built in 2018, so it is 7 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 3,180 vehicles a day, roughly 11% of them trucks, projected to reach 4,130 by 2039. The structure is 64 ft (19.5 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesSterling Highway
CrossesSterling Wildlife UP 2
LocationMile Point 37.2
RouteInterstate 0A33
StateAlaska
Coordinates60.52969, -150.51829
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.7 US tons
Inventory rating50.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHL 93
Structure length64 ft (19.5 m)
Longest span26 ft (7.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,180 (2020)
Projected traffic4,130 by 2039
Trucks11%
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 Sterling Highway over Sterling Wildlife UP 2 built?

It was built in 2018, making it 7 years old in 2025.

What condition is Sterling Highway over Sterling Wildlife UP 2 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 Sterling Wildlife UP 2 carry?

About 3,180 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is Sterling Highway over Sterling Wildlife UP 2?

The structure is 64 ft (19.5 m) long with a longest span of 26 ft (7.9 m).

Who owns Sterling Highway over Sterling Wildlife UP 2?

It is owned by the State Highway Agency.