US Bridges

Richardson Highway over Salcha River

Fair

Fairbanks North Star Borough, Alaska · Mile Point 324.7 · Structure no. 0527

Built
1967
58 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
504 ft
4 main spans
Daily traffic
930
2020 count
Owner
State
State Highway Agency

About this bridge

Richardson Highway over Salcha River is a steel continuous stringer/multi-beam or girder carrying Richardson Highway over Salcha River in Fairbanks North Star Borough, Alaska. It was built in 1967, so it is 58 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 6 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 930 vehicles a day, roughly 14% of them trucks, projected to reach 1,110 by 2039. The structure is 504 ft (153.7 m) long and 38 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesRichardson Highway
CrossesSalcha River
LocationMile Point 324.7
RouteInterstate 0A24
StateAlaska
Coordinates64.46931, -146.93245
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating109.2 US tons
Inventory rating50.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length504 ft (153.7 m)
Longest span141 ft (43 m)
Deck width38 ft (11.7 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic930 (2020)
Projected traffic1,110 by 2039
Trucks14%
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 Richardson Highway over Salcha River built?

It was built in 1967, making it 58 years old in 2025.

What condition is Richardson Highway over Salcha 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 July 2024.

How much traffic does Richardson Highway over Salcha River carry?

About 930 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is Richardson Highway over Salcha River?

The structure is 504 ft (153.7 m) long with a longest span of 141 ft (43 m) and a deck 38 ft wide.

Who owns Richardson Highway over Salcha River?

It is owned by the State Highway Agency.