US Bridges

Oak ST over Union Pacific RR

Good

Cook County, Illinois · Oak Ov Union P.Rr · Structure no. 016825700000000

Built
1940
85 years old, rebuilt 2019
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
148 ft
4 main spans
Daily traffic
1,050
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Oak ST over Union Pacific RR is a prestressed concrete box beam or girders - multiple carrying Oak ST over Union Pacific RR in Cook County, Illinois. It was built in 1940 and reconstructed in 2019, so it is 85 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,050 vehicles a day, roughly 7% of them trucks, projected to reach 1,162 by 2046. The structure is 148 ft (45 m) long and 53 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesOak ST
CrossesUnion Pacific RR
LocationOak Ov Union P.Rr
RouteCity Street 0
CountyCook County
StateIllinois
Coordinates42.10433, -87.73207
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.4 US tons
Inventory rating47.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 25 or greater
Structure length148 ft (45 m)
Longest span41 ft (12.5 m)
Deck width53 ft (16.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2022)
Projected traffic1,162 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-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$1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Oak ST over Union Pacific RR built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2019.

What condition is Oak ST over Union Pacific RR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Oak ST over Union Pacific RR carry?

About 1,050 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Oak ST over Union Pacific RR?

The structure is 148 ft (45 m) long with a longest span of 41 ft (12.5 m) and a deck 53 ft wide.

Who owns Oak ST over Union Pacific RR?

It is owned by the City or Municipal Highway Agency.