US Bridges

Lake Cook RD over Il 21 (milwaukee)

Fair

Cook County, Illinois · 2.1 M W I-94 · Structure no. 016325700000000

Built
1995
30 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
261 ft
2 main spans
Daily traffic
33,900
2022 count
Owner
State
State Highway Agency

About this bridge

Lake Cook RD over Il 21 (milwaukee) is a steel continuous stringer/multi-beam or girder carrying Lake Cook RD over Il 21 (milwaukee) in Cook County, Illinois. It was built in 1995, so it is 30 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 33,900 vehicles a day, roughly 5% of them trucks, projected to reach 43,733 by 2046. The structure is 261 ft (79.7 m) long and 96 ft wide.

Location

Open in Google Maps
CarriesLake Cook RD
CrossesIl 21 (milwaukee)
Location2.1 M W I-94
CountyCook County
StateIllinois
Coordinates42.15311, -87.9155
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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length261 ft (79.7 m)
Longest span128 ft (39 m)
Deck width96 ft (29.4 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,900 (2022)
Projected traffic43,733 by 2046
Trucks5%
Lanes on structure6
Traffic directionTwo-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$5.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Lake Cook RD over Il 21 (milwaukee) built?

It was built in 1995, making it 30 years old in 2025.

What condition is Lake Cook RD over Il 21 (milwaukee) 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 December 2023.

How much traffic does Lake Cook RD over Il 21 (milwaukee) carry?

About 33,900 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Lake Cook RD over Il 21 (milwaukee)?

The structure is 261 ft (79.7 m) long with a longest span of 128 ft (39 m) and a deck 96 ft wide.

Who owns Lake Cook RD over Il 21 (milwaukee)?

It is owned by the State Highway Agency.