US Bridges

Il 178/FAU 6120 over I-80

Good

LaSalle County, Illinois · N of US 6 Utica · Structure no. 050024800000000

Built
2011
14 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
193 ft
2 main spans
Daily traffic
3,200
2023 count
Owner
State
State Highway Agency

About this bridge

Il 178/FAU 6120 over I-80 is a steel continuous stringer/multi-beam or girder carrying Il 178/FAU 6120 over I-80 in LaSalle County, Illinois. It was built in 2011, so it is 14 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,200 vehicles a day, roughly 29% of them trucks, projected to reach 2,752 by 2046. The structure is 193 ft (58.8 m) long and 65 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIl 178/FAU 6120
CrossesI-80
LocationN of US 6 Utica
RouteState Highway 178
Coordinates41.36755, -89.01015
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.1 US tons
Inventory rating46.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length193 ft (58.8 m)
Longest span96 ft (29.4 m)
Deck width65 ft (19.8 m)
Roadway width57 ft (17.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2023)
Projected traffic2,752 by 2046
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 Il 178/FAU 6120 over I-80 built?

It was built in 2011, making it 14 years old in 2025.

What condition is Il 178/FAU 6120 over I-80 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does Il 178/FAU 6120 over I-80 carry?

About 3,200 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is Il 178/FAU 6120 over I-80?

The structure is 193 ft (58.8 m) long with a longest span of 96 ft (29.4 m) and a deck 65 ft wide.

Who owns Il 178/FAU 6120 over I-80?

It is owned by the State Highway Agency.