Structure 16150100000000 · Cook County, IL

I- 55 WB Stevenson over Ml King DR & Ramp

Carries I- 55 WB Stevenson over Ml King DR & Ramp, 1.3m 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 FT740 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

740 ft end to end, longest span 180 ft: about 2.1 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.

Built201511 years old
Length740.2 ft225.6 m
Daily traffic64,950counted 2024
Last inspectedAugust 2023every 24 months

Location

StateIllinois
CountyCook
Location1.3m E Of I94
CarriesI- 55 WB Stevenson
CrossesMl King DR & Ramp
Coordinates41.84794, -87.61841

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length740.2 ft (225.6 m)
Max Span180.1 ft (54.9 m)
Deck Width71.2 ft (21.7 m)
Deck Area4895.5 sq m
Main Spans5
Year Built2015

Traffic

Avg Daily Traffic64,950 (2024)
Truck Traffic1%
Lanes On Bridge4
Lanes Under Bridge6

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 Number016150100000000

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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