US Bridges

Il 43 SB (harlem) over RR - Cn

Fair

Cook County, Illinois · 0.1 M S I-55 · Structure no. 016031700000000

Built
1966
59 years old, rebuilt 1990
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
714 ft
11 main spans
Daily traffic
39,000
2023 count
Owner
State
State Highway Agency

About this bridge

Il 43 SB (harlem) over RR - Cn is a steel continuous stringer/multi-beam or girder carrying Il 43 SB (harlem) over RR - Cn in Cook County, Illinois. It was built in 1966 and reconstructed in 1990, so it is 59 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 39,000 vehicles a day, roughly 10% of them trucks, projected to reach 21,564 by 2046. The structure is 714 ft (217.7 m) long and 50 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIl 43 SB (harlem)
CrossesRR - Cn
Location0.1 M S I-55
RouteState Highway 43
CountyCook County
StateIllinois
Coordinates41.79797, -87.80208
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
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 rating40.3 US tons
Inventory rating21.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length714 ft (217.7 m)
Longest span73 ft (22.4 m)
Deck width50 ft (15.3 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,000 (2023)
Projected traffic21,564 by 2046
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed5 mi (8 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 43 SB (harlem) over RR - Cn built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1990.

What condition is Il 43 SB (harlem) over RR - Cn 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 April 2023.

How much traffic does Il 43 SB (harlem) over RR - Cn carry?

About 39,000 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Il 43 SB (harlem) over RR - Cn?

The structure is 714 ft (217.7 m) long with a longest span of 73 ft (22.4 m) and a deck 50 ft wide.

Who owns Il 43 SB (harlem) over RR - Cn?

It is owned by the State Highway Agency.