US Bridges

Il 56 WB over Il 47

Fair

Kane County, Illinois · 4 M S I-88 · Structure no. 045003600000000

Built
1961
64 years old, rebuilt 1985
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
210 ft
4 main spans
Daily traffic
14,800
2023 count
Owner
State
State Highway Agency

About this bridge

Il 56 WB over Il 47 is a steel continuous stringer/multi-beam or girder carrying Il 56 WB over Il 47 in Kane County, Illinois. It was built in 1961 and reconstructed in 1985, so it is 64 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 14,800 vehicles a day, roughly 10% of them trucks, projected to reach 10,309 by 2046. The structure is 210 ft (63.9 m) long and 48 ft wide.

CarriesIl 56 WB
CrossesIl 47
Location4 M S I-88
RouteState Highway 56
Coordinates41.76522, -88.44261
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating73.5 US tons
Inventory rating39.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length210 ft (63.9 m)
Longest span63 ft (19.1 m)
Deck width48 ft (14.5 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,800 (2023)
Projected traffic10,309 by 2046
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Il 56 WB over Il 47 built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1985.

What condition is Il 56 WB over Il 47 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 June 2024.

How much traffic does Il 56 WB over Il 47 carry?

About 14,800 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Il 56 WB over Il 47?

The structure is 210 ft (63.9 m) long with a longest span of 63 ft (19.1 m) and a deck 48 ft wide.

Who owns Il 56 WB over Il 47?

It is owned by the State Highway Agency.