US Bridges

Richardson Highway over Chena Flood Chanl - N.B.

FairPosted for load

Fairbanks North Star Borough, Alaska · Mile Point 346.8 · Structure no. 1364

Built
1977
48 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Prestressed Concrete
Length
982 ft
14 main spans
Daily traffic
3,990
2020 count
Owner
State
State Highway Agency

About this bridge

Richardson Highway over Chena Flood Chanl - N.B. is a prestressed concrete tee beam carrying Richardson Highway over Chena Flood Chanl - N.B. in Fairbanks North Star Borough, Alaska. It was built in 1977, so it is 48 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. Its operating status is: posted for load restriction.

It carries about 3,990 vehicles a day, roughly 7% of them trucks, projected to reach 4,985 by 2039. The structure is 982 ft (299.3 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesRichardson Highway
CrossesChena Flood Chanl - N.B.
LocationMile Point 346.8
RouteInterstate 0A24
CountyFairbanks North Star Borough
StateAlaska
Coordinates64.72566, -147.25487
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.5 US tons
Inventory rating36.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans14
Design loadHS 20
Structure length982 ft (299.3 m)
Longest span70 ft (21.3 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,990 (2020)
Projected traffic4,985 by 2039
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
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 Chena Flood Chanl - N.B. built?

It was built in 1977, making it 48 years old in 2025.

What condition is Richardson Highway over Chena Flood Chanl - N.B. 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 Chena Flood Chanl - N.B. carry?

About 3,990 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Richardson Highway over Chena Flood Chanl - N.B.?

The structure is 982 ft (299.3 m) long with a longest span of 70 ft (21.3 m) and a deck 36 ft wide.

Who owns Richardson Highway over Chena Flood Chanl - N.B.?

It is owned by the State Highway Agency.