US Bridges

Lake Cook RD over W.C.Rr.(soo Line)

Fair

Cook County, Illinois · 1 M W Milw Av P25 · Structure no. 016320100000000

Built
1979
46 years old, rebuilt 2001
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
162 ft
3 main spans
Daily traffic
29,700
2022 count
Owner
County
County Highway Agency

About this bridge

Lake Cook RD over W.C.Rr.(soo Line) is a steel continuous stringer/multi-beam or girder carrying Lake Cook RD over W.C.Rr.(soo Line) in Cook County, Illinois. It was built in 1979 and reconstructed in 2001, so it is 46 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 29,700 vehicles a day, roughly 4% of them trucks, projected to reach 36,663 by 2046. The structure is 162 ft (49.3 m) long and 105 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLake Cook RD
CrossesW.C.Rr.(soo Line)
Location1 M W Milw Av P25
CountyCook County
StateIllinois
Coordinates42.15301, -87.93399
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.6 US tons
Inventory rating47.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length162 ft (49.3 m)
Longest span60 ft (18.3 m)
Deck width105 ft (32 m)
Roadway width77 ft (23.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,700 (2022)
Projected traffic36,663 by 2046
Trucks4%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$217,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Lake Cook RD over W.C.Rr.(soo Line) built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 2001.

What condition is Lake Cook RD over W.C.Rr.(soo Line) 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 January 2024.

How much traffic does Lake Cook RD over W.C.Rr.(soo Line) carry?

About 29,700 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Lake Cook RD over W.C.Rr.(soo Line)?

The structure is 162 ft (49.3 m) long with a longest span of 60 ft (18.3 m) and a deck 105 ft wide.

Who owns Lake Cook RD over W.C.Rr.(soo Line)?

It is owned by the County Highway Agency.