Structure 86003800000000 · Scott County, IL

Fai 72 WB over Ill 100

Carries Fai 72 WB over Ill 100, I-72 & Il100 Int.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT174 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

174 ft end to end: 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.

Built198145 years old
Length174.2 ft53.1 m
Daily traffic4,950counted 2023
Last inspectedJanuary 2024every 24 months

Location

StateIllinois
CountyScott
LocationI-72 & Il100 Int
CarriesFai 72 WB
CrossesIll 100
Coordinates39.68504, -90.57038

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length174.2 ft (53.1 m)
Max Span125.3 ft (38.2 m)
Deck Width42.0 ft (12.8 m)
Deck Area679.7 sq m
Main Spans1
Year Built1981

Traffic

Avg Daily Traffic4,950 (2023)
Truck Traffic34%
Lanes On Bridge2
Lanes Under Bridge3

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number086003800000000

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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