Structure 82026100000000 · St. Clair County, IL

81st St/ch35 over Fai 64/cd 360-361

Carries 81st St/ch35 over Fai 64/cd 360-361, 1 Mi West Of Ill 157.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT270 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

270 ft end to end, longest span 142 ft: about 4 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.

Built1969rebuilt 2012
Length270.3 ft82.4 m
Daily traffic500counted 2023
Last inspectedFebruary 2023every 24 months

Location

StateIllinois
CountySt. Clair
Location1 Mi West Of Ill 157
Carries81st St/ch35
CrossesFai 64/cd 360-361
Coordinates38.61909, -90.06029

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length270.3 ft (82.4 m)
Max Span142.1 ft (43.3 m)
Deck Width43.0 ft (13.1 m)
Deck Area1079.4 sq m
Main Spans2
Year Built1969 (reconstructed 2012)

Traffic

Avg Daily Traffic500 (2023)
Truck Traffic26%
Lanes On Bridge2
Lanes Under Bridge18

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number082026100000000

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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