Structure 16826000000000 · Cook County, IL

Eldorado ST over Up Rr

Carries Eldorado ST over Up Rr, 0.2 M S Of Tower RD.

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT148 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

148 ft end to end, longest span 41 ft: about 2 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.

Built1940rebuilt 2007
Length147.6 ft45 m
Daily traffic400counted 2022
Last inspectedAugust 2023every 24 months

Location

StateIllinois
CountyCook
Location0.2 M S Of Tower RD
CarriesEldorado ST
CrossesUp Rr
Coordinates42.11290, -87.73912

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length147.6 ft (45 m)
Max Span41.3 ft (12.6 m)
Deck Width29.9 ft (9.1 m)
Deck Area409.5 sq m
Main Spans4
Year Built1940 (reconstructed 2007)

Traffic

Avg Daily Traffic400 (2022)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number016826000000000

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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