US Bridges

Illinois/Cushman over Chena River (cushman)

Fair

Fairbanks North Star Borough, Alaska · Mile Point 3.3 · Structure no. 0390

Built
1960
65 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
243 ft
3 main spans
Daily traffic
7,390
2020 count
Owner
State
State Highway Agency

About this bridge

Illinois/Cushman over Chena River (cushman) is a steel stringer/multi-beam or girder carrying Illinois/Cushman over Chena River (cushman) in Fairbanks North Star Borough, Alaska. It was built in 1960, so it is 65 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 7,390 vehicles a day, roughly 4% of them trucks, projected to reach 8,480 by 2039. The structure is 243 ft (74 m) long and 60 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIllinois/Cushman
CrossesChena River (cushman)
LocationMile Point 3.3
RouteState Highway 663
CountyFairbanks North Star Borough
StateAlaska
Coordinates64.84428, -147.72166
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating40.1 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length243 ft (74 m)
Longest span80 ft (24.4 m)
Deck width60 ft (18.3 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,390 (2020)
Projected traffic8,480 by 2039
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 Illinois/Cushman over Chena River (cushman) built?

It was built in 1960, making it 65 years old in 2025.

What condition is Illinois/Cushman over Chena River (cushman) 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 2024.

How much traffic does Illinois/Cushman over Chena River (cushman) carry?

About 7,390 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Illinois/Cushman over Chena River (cushman)?

The structure is 243 ft (74 m) long with a longest span of 80 ft (24.4 m) and a deck 60 ft wide.

Who owns Illinois/Cushman over Chena River (cushman)?

It is owned by the State Highway Agency.