US Bridges

Il 394 NB over I- 94 EB & Thorn CR

Fair

Cook County, Illinois · Ill 394 I80/294 Int. · Structure no. 016280200000000

Built
2005
20 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
718 ft
5 main spans
Daily traffic
72,000
2024 count
Owner
State
State Highway Agency

About this bridge

Il 394 NB over I- 94 EB & Thorn CR is a steel continuous stringer/multi-beam or girder carrying Il 394 NB over I- 94 EB & Thorn CR in Cook County, Illinois. It was built in 2005, so it is 20 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 72,000 vehicles a day, roughly 10% of them trucks, projected to reach 23,887 by 2046. The structure is 718 ft (218.7 m) long and 51 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesIl 394 NB
CrossesI- 94 EB & Thorn CR
LocationIll 394 I80/294 Int.
RouteState Highway 394
CountyCook County
StateIllinois
Coordinates41.58243, -87.58341
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.6 US tons
Inventory rating58.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length718 ft (218.7 m)
Longest span177 ft (54 m)
Deck width51 ft (15.4 m)
Roadway width47 ft (14.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72,000 (2024)
Projected traffic23,887 by 2046
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed3.7 mi (6 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 394 NB over I- 94 EB & Thorn CR built?

It was built in 2005, making it 20 years old in 2025.

What condition is Il 394 NB over I- 94 EB & Thorn 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 March 2023.

How much traffic does Il 394 NB over I- 94 EB & Thorn CR carry?

About 72,000 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Il 394 NB over I- 94 EB & Thorn CR?

The structure is 718 ft (218.7 m) long with a longest span of 177 ft (54 m) and a deck 51 ft wide.

Who owns Il 394 NB over I- 94 EB & Thorn CR?

It is owned by the State Highway Agency.