Structure 16150300000000 · Cook County, IL

I- 55 EB To US 41n over US 41 Lsd & Cn Rr

Carries I- 55 EB To US 41n over US 41 Lsd & Cn Rr, 1.6 M E Of -i94.

Overall conditionGood

Set by its lowest-rated component: Deck at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,251 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

1,251 ft end to end, longest span 165 ft: about 3.5 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built20179 years old
Length1251.0 ft381.3 m
Daily traffic62,400counted 2024
Last inspectedAugust 2023every 24 months

Location

StateIllinois
CountyCook
Location1.6 M E Of -i94
CarriesI- 55 EB To US 41n
CrossesUS 41 Lsd & Cn Rr
Coordinates41.84956, -87.61227

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length1251.0 ft (381.3 m)
Max Span165.0 ft (50.3 m)
Deck Width43.3 ft (13.2 m)
Deck Area5033.2 sq m
Main Spans9
Year Built2017

Traffic

Avg Daily Traffic62,400 (2024)
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number016150300000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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