US Bridges

FAI-57 SB over Branch of Spring CR

Fair

Iroquois County, Illinois · 3.1 MI S Onarga Int · Structure no. 038015300000000

Built
1968
57 years old, rebuilt 2016
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
101 ft
3 main spans
Daily traffic
8,750
2023 count
Owner
State
State Highway Agency

About this bridge

FAI-57 SB over Branch of Spring CR is a concrete continuous tee beam carrying FAI-57 SB over Branch of Spring CR in Iroquois County, Illinois. It was built in 1968 and reconstructed in 2016, so it is 57 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 8,750 vehicles a day, roughly 42% of them trucks, projected to reach 8,737 by 2046. The structure is 101 ft (30.8 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesFAI-57 SB
CrossesBranch of Spring CR
Location3.1 MI S Onarga Int
RouteInterstate 57
CountyIroquois County
StateIllinois
Coordinates40.67136, -88.03559
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating29.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length101 ft (30.8 m)
Longest span38 ft (11.6 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,750 (2023)
Projected traffic8,737 by 2046
Trucks42%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAI-57 SB over Branch of Spring CR built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2016.

What condition is FAI-57 SB over Branch of Spring CR 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 February 2024.

How much traffic does FAI-57 SB over Branch of Spring CR carry?

About 8,750 vehicles per day (2023 count), of which roughly 42% are trucks.

How long is FAI-57 SB over Branch of Spring CR?

The structure is 101 ft (30.8 m) long with a longest span of 38 ft (11.6 m) and a deck 43 ft wide.

Who owns FAI-57 SB over Branch of Spring CR?

It is owned by the State Highway Agency.