US Bridges

Randolph ST over Union Sta Trks

Fair

Cook County, Illinois · 150N 430W to 500W · Structure no. 016633900000000

Built
1985
40 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
213 ft
3 main spans
Daily traffic
12,200
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Randolph ST over Union Sta Trks is a steel continuous stringer/multi-beam or girder carrying Randolph ST over Union Sta Trks in Cook County, Illinois. It was built in 1985, so it is 40 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 12,200 vehicles a day, roughly 10% of them trucks, projected to reach 11,514 by 2046. The structure is 213 ft (64.9 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRandolph ST
CrossesUnion Sta Trks
Location150N 430W to 500W
CountyCook County
StateIllinois
Coordinates41.88447, -87.63888
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.9 US tons
Inventory rating56.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length213 ft (64.9 m)
Longest span85 ft (25.9 m)
Deck width80 ft (24.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,200 (2022)
Projected traffic11,514 by 2046
Trucks10%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$2.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Randolph ST over Union Sta Trks built?

It was built in 1985, making it 40 years old in 2025.

What condition is Randolph ST over Union Sta Trks 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 May 2023.

How much traffic does Randolph ST over Union Sta Trks carry?

About 12,200 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Randolph ST over Union Sta Trks?

The structure is 213 ft (64.9 m) long with a longest span of 85 ft (25.9 m) and a deck 80 ft wide.

Who owns Randolph ST over Union Sta Trks?

It is owned by the City or Municipal Highway Agency.