US Bridges

Il 120 over RR - UP & Old Skokie

Fair

Lake County, Illinois · Gurnee · Structure no. 049005100000000

Built
1959
66 years old, rebuilt 2017
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
273 ft
4 main spans
Daily traffic
28,400
2023 count
Owner
State
State Highway Agency

About this bridge

Il 120 over RR - UP & Old Skokie is a steel continuous stringer/multi-beam or girder carrying Il 120 over RR - UP & Old Skokie in Lake County, Illinois. It was built in 1959 and reconstructed in 2017, so it is 66 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 28,400 vehicles a day, roughly 6% of them trucks, projected to reach 28,179 by 2046. The structure is 273 ft (83.1 m) long and 83 ft wide.

Location

Open in Google Maps
CarriesIl 120
CrossesRR - UP & Old Skokie
LocationGurnee
RouteState Highway 120
CountyLake County
StateIllinois
Coordinates42.34814, -87.88904
Functional classUrban Minor 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.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
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 alignment7: Better than present minimum criteria
Operating rating62.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length273 ft (83.1 m)
Longest span72 ft (21.8 m)
Deck width83 ft (25.2 m)
Roadway width80 ft (24.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,400 (2023)
Projected traffic28,179 by 2046
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Il 120 over RR - UP & Old Skokie built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2017.

What condition is Il 120 over RR - UP & Old Skokie 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 2025.

How much traffic does Il 120 over RR - UP & Old Skokie carry?

About 28,400 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Il 120 over RR - UP & Old Skokie?

The structure is 273 ft (83.1 m) long with a longest span of 72 ft (21.8 m) and a deck 83 ft wide.

Who owns Il 120 over RR - UP & Old Skokie?

It is owned by the State Highway Agency.