Structure 82025300000000 · St. Clair County, IL

I-55/64 WB Cd R-li over Uprr

Carries I-55/64 WB Cd R-li over Uprr, Pier G1 To Pier A21.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT675 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 4/9 · sets the ratingSubstructure 5/9

675 ft end to end, longest span 136 ft: about 1.9 football fields. 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.

Built1969rebuilt 1990
Length675.2 ft205.8 m
Daily traffic10,000counted 2024
Last inspectedDecember 2024every 12 months

Location

StateIllinois
CountySt. Clair
LocationPier G1 To Pier A21
CarriesI-55/64 WB Cd R-li
CrossesUprr
Coordinates38.62041, -90.16630

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length675.2 ft (205.8 m)
Max Span136.2 ft (41.5 m)
Deck Width39.0 ft (11.9 m)
Deck Area2449.0 sq m
Main Spans6
Year Built1969 (reconstructed 1990)

Traffic

Avg Daily Traffic10,000 (2024)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number082025300000000

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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