Structure 16034900000000 · Cook County, IL

Il 58 over Salt Creek

Carries Il 58 over Salt Creek, 1 M E Il 53.

Overall conditionGood

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

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT69 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

69 ft end to end. Lengths and the car 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 box-beam bridge.

Built1928rebuilt 2008
Length68.9 ft21 m
Daily traffic32,800counted 2023
Last inspectedAugust 2024every 24 months

Location

StateIllinois
CountyCook
Location1 M E Il 53
CarriesIl 58
CrossesSalt Creek
Coordinates42.05111, -88.00955

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length68.9 ft (21 m)
Max Span26.9 ft (8.2 m)
Deck Width91.9 ft (28 m)
Deck Area588 sq m
Main Spans1
Year Built1928 (reconstructed 2008)

Traffic

Avg Daily Traffic32,800 (2023)
Truck Traffic2%
Lanes On Bridge4

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number016034900000000

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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