Structure 46013600000000 · Kankakee County, IL

I-57 SB over Kankakee River

Carries I-57 SB over Kankakee River, 2.9 M N. Of US 45/52.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT886 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

886 ft end to end, longest span 180 ft: about 2.5 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.

Built201511 years old
Length886.2 ft270.1 m
Daily traffic11,650counted 2023
Last inspectedJanuary 2023every 24 months

Location

StateIllinois
CountyKankakee
Location2.9 M N. Of US 45/52
CarriesI-57 SB
CrossesKankakee River
Coordinates41.09973, -87.83476

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length886.2 ft (270.1 m)
Max Span180.1 ft (54.9 m)
Deck Width43.3 ft (13.2 m)
Deck Area3565.3 sq m
Main Spans5
Year Built2015

Traffic

Avg Daily Traffic11,650 (2023)
Truck Traffic29%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number046013600000000

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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