Structure 16070800000000 · Cook County, IL

Nagle AVE over I- 90 Jfk & Cta

Carries Nagle AVE over I- 90 Jfk & Cta, 2.6 M W Il 50.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT235 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

235 ft end to end, longest span 77 ft: about 3 semi-trucks nose to tail. 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.

Built1958rebuilt 2005
Length234.9 ft71.6 m
Daily traffic23,300counted 2023
Last inspectedJanuary 2024every 24 months

Location

StateIllinois
CountyCook
Location2.6 M W Il 50
CarriesNagle AVE
CrossesI- 90 Jfk & Cta
Coordinates41.98238, -87.78773

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length234.9 ft (71.6 m)
Max Span77.4 ft (23.6 m)
Deck Width81.7 ft (24.9 m)
Deck Area1782.8 sq m
Main Spans4
Year Built1958 (reconstructed 2005)

Traffic

Avg Daily Traffic23,300 (2023)
Truck Traffic3%
Lanes On Bridge6
Lanes Under Bridge6

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number016070800000000

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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