US Bridges

Monroe ST over Metra Electric RR

Fair

Cook County, Illinois · 100S & 200E · Structure no. 016616100000000

Built
1938
87 years old, rebuilt 2001
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
299 ft
6 main spans
Daily traffic
9,300
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Monroe ST over Metra Electric RR is a steel continuous stringer/multi-beam or girder carrying Monroe ST over Metra Electric RR in Cook County, Illinois. It was built in 1938 and reconstructed in 2001, so it is 87 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 9,300 vehicles a day, roughly 8% of them trucks, projected to reach 11,514 by 2046. The structure is 299 ft (91.1 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMonroe ST
CrossesMetra Electric RR
Location100S & 200E
CountyCook County
StateIllinois
Coordinates41.88085, -87.62339
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length299 ft (91.1 m)
Longest span61 ft (18.5 m)
Deck width84 ft (25.7 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,300 (2022)
Projected traffic11,514 by 2046
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Monroe ST over Metra Electric RR built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 2001.

What condition is Monroe ST over Metra Electric RR 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 Monroe ST over Metra Electric RR carry?

About 9,300 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Monroe ST over Metra Electric RR?

The structure is 299 ft (91.1 m) long with a longest span of 61 ft (18.5 m) and a deck 84 ft wide.

Who owns Monroe ST over Metra Electric RR?

It is owned by the City or Municipal Highway Agency.