Structure 16260700000000 · Cook County, IL

Il 171 (archer AVE over Rr - Ihb

Carries Il 171 (archer AVE over Rr - Ihb, At 60th Pl.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT134 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

134 ft end to end, longest span 48 ft. 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.

Built199531 years old
Length133.5 ft40.7 m
Daily traffic28,400counted 2023
Last inspectedOctober 2023every 24 months

Location

StateIllinois
CountyCook
LocationAt 60th Pl
CarriesIl 171 (archer AVE
CrossesRr - Ihb
Coordinates41.78379, -87.81173

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length133.5 ft (40.7 m)
Max Span47.9 ft (14.6 m)
Deck Width63.0 ft (19.2 m)
Deck Area781.4 sq m
Main Spans3
Year Built1995

Traffic

Avg Daily Traffic28,400 (2023)
Truck Traffic12%
Lanes On Bridge4

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number016260700000000

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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