US Bridges

North Fork Road over South Fork Anchor River

Fair

Kenai Peninsula Borough, Alaska · Mile Point 5.3 · Structure no. 1199

Built
1968
57 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
180
2020 count
Owner
State
State Highway Agency

About this bridge

North Fork Road over South Fork Anchor River is a steel stringer/multi-beam or girder carrying North Fork Road over South Fork Anchor River in Kenai Peninsula Borough, Alaska. It was built in 1968, so it is 57 years old, older than the Alaska average of 35.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 180 vehicles a day, roughly 8% of them trucks, projected to reach 270 by 2039. The structure is 70 ft (21.3 m) long and 20 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

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CarriesNorth Fork Road
CrossesSouth Fork Anchor River
LocationMile Point 5.3
RouteState Highway NSP00
CountyKenai Peninsula Borough
StateAlaska
Coordinates59.71694, -151.64611
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.6 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length70 ft (21.3 m)
Longest span70 ft (21.2 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2020)
Projected traffic270 by 2039
Trucks8%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 North Fork Road over South Fork Anchor River built?

It was built in 1968, making it 57 years old in 2025.

What condition is North Fork Road over South Fork Anchor River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does North Fork Road over South Fork Anchor River carry?

About 180 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is North Fork Road over South Fork Anchor River?

The structure is 70 ft (21.3 m) long with a longest span of 70 ft (21.2 m) and a deck 20 ft wide.

Who owns North Fork Road over South Fork Anchor River?

It is owned by the State Highway Agency.