Structure 82027300000000 · St. Clair County, IL

Fau 9206-water ST over Prairie Dupont Canal

Carries Fau 9206-water ST over Prairie Dupont Canal, 1.5m S Ill 157.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT351 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

351 ft end to end, longest span 137 ft: about 5 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.

Built198442 years old
Length351.0 ft107 m
Daily traffic1,350counted 2023
Last inspectedAugust 2024every 24 months

Location

StateIllinois
CountySt. Clair
Location1.5m S Ill 157
CarriesFau 9206-water ST
CrossesPrairie Dupont Canal
Coordinates38.55216, -90.20130

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length351.0 ft (107 m)
Max Span137.1 ft (41.8 m)
Deck Width31.2 ft (9.5 m)
Deck Area1016.5 sq m
Main Spans3
Year Built1984

Traffic

Avg Daily Traffic1,350 (2023)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number082027300000000

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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