Structure 16323400000000 · Cook County, IL

Techny Road over N. Br Chicago River

Carries Techny Road over N. Br Chicago River, 0.4 M E Il43 P14.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT64 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

64 ft end to end, longest span 32 ft. 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 slab bridge.

Built199333 years old
Length64.0 ft19.5 m
Daily traffic7,500counted 2022
Last inspectedJune 2024every 24 months

Location

StateIllinois
CountyCook
Location0.4 M E Il43 P14
CarriesTechny Road
CrossesN. Br Chicago River
Coordinates42.11640, -87.81536

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length64.0 ft (19.5 m)
Max Span31.8 ft (9.7 m)
Deck Width40.0 ft (12.2 m)
Deck Area237.9 sq m
Main Spans2
Year Built1993

Traffic

Avg Daily Traffic7,500 (2022)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number016323400000000

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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