US Bridges

US 6 over I- 55

Fair

Will County, Illinois · 2 M S of I-80 · Structure no. 099027700000000

Built
1989
36 years old, rebuilt 2015
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
297 ft
2 main spans
Daily traffic
15,700
2023 count
Owner
State
State Highway Agency

About this bridge

US 6 over I- 55 is a steel continuous stringer/multi-beam or girder carrying US 6 over I- 55 in Will County, Illinois. It was built in 1989 and reconstructed in 2015, so it is 36 years old, younger 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 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 15,700 vehicles a day, roughly 7% of them trucks, projected to reach 23,616 by 2046. The structure is 297 ft (90.4 m) long and 104 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUS 6
CrossesI- 55
Location2 M S of I-80
RouteU.S. Route 6
CountyWill County
StateIllinois
Coordinates41.456, -88.19616
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length297 ft (90.4 m)
Longest span145 ft (44.2 m)
Deck width104 ft (31.8 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,700 (2023)
Projected traffic23,616 by 2046
Trucks7%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed6.2 mi (10 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 6 over I- 55 built?

It was built in 1989, making it 36 years old in 2025. It was reconstructed in 2015.

What condition is US 6 over I- 55 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 May 2023.

How much traffic does US 6 over I- 55 carry?

About 15,700 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 6 over I- 55?

The structure is 297 ft (90.4 m) long with a longest span of 145 ft (44.2 m) and a deck 104 ft wide.

Who owns US 6 over I- 55?

It is owned by the State Highway Agency.