US Bridges

FAI 80 SB over Rock River

Fair

Henry County, Illinois · At Rock Island CO LN · Structure no. 037002100000000

Built
1965
60 years old, rebuilt 1991
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
1,186 ft
11 main spans
Daily traffic
11,250
2023 count
Owner
State
State Highway Agency

About this bridge

FAI 80 SB over Rock River is a steel stringer/multi-beam or girder carrying FAI 80 SB over Rock River in Henry County, Illinois. It was built in 1965 and reconstructed in 1991, so it is 60 years old, older than the Illinois average of 45.3 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 11,250 vehicles a day, roughly 37% of them trucks, projected to reach 12,420 by 2046. The structure is 1,186 ft (361.5 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFAI 80 SB
CrossesRock River
LocationAt Rock Island CO LN
RouteInterstate 80
CountyHenry County
StateIllinois
Coordinates41.51102, -90.34111
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.8 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length1,186 ft (361.5 m)
Longest span108 ft (32.9 m)
Deck width45 ft (13.8 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,250 (2023)
Projected traffic12,420 by 2046
Trucks37%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was FAI 80 SB over Rock River built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1991.

What condition is FAI 80 SB over Rock 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 FAI 80 SB over Rock River carry?

About 11,250 vehicles per day (2023 count), of which roughly 37% are trucks.

How long is FAI 80 SB over Rock River?

The structure is 1,186 ft (361.5 m) long with a longest span of 108 ft (32.9 m) and a deck 45 ft wide.

Who owns FAI 80 SB over Rock River?

It is owned by the State Highway Agency.