US Bridges

Old Sterling HWY over Anchor River

Good

Kenai Peninsula Borough, Alaska · Mile Point 8.4 · Structure no. 0910

Built
2021
4 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
254 ft
1 main span
Daily traffic
1,380
2020 count
Owner
State
State Highway Agency

About this bridge

Old Sterling HWY over Anchor River is a steel stringer/multi-beam or girder carrying Old Sterling HWY over Anchor River in Kenai Peninsula Borough, 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 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 1,380 vehicles a day, roughly 8% of them trucks, projected to reach 2,120 by 2039. The structure is 254 ft (77.4 m) long and 37 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesOld Sterling HWY
CrossesAnchor River
LocationMile Point 8.4
RouteState Highway NSP00
StateAlaska
Coordinates59.77194, -151.83667
Functional classRural Minor Collector

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.
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 alignment8: Equal to present desirable criteria
Operating rating105.8 US tons
Inventory rating44.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length254 ft (77.4 m)
Longest span250 ft (76.2 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,380 (2020)
Projected traffic2,120 by 2039
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

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 Old Sterling HWY over Anchor River built?

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

What condition is Old Sterling HWY over Anchor River 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 Old Sterling HWY over Anchor River carry?

About 1,380 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Old Sterling HWY over Anchor River?

The structure is 254 ft (77.4 m) long with a longest span of 250 ft (76.2 m) and a deck 37 ft wide.

Who owns Old Sterling HWY over Anchor River?

It is owned by the State Highway Agency.