Structure 82005600000000 · St. Clair County, IL

Ill 177 / Il 158 over Creek

Carries Ill 177 / Il 158 over Creek, 1.5 Mi E Of Il 159.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT41 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

41 ft end to end, longest span 20 ft. Lengths and the car 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 slab bridge.

Built195967 years old
Length41.0 ft12.5 m
Daily traffic7,300counted 2023
Last inspectedJuly 2024every 12 months

Location

StateIllinois
CountySt. Clair
Location1.5 Mi E Of Il 159
CarriesIll 177 / Il 158
CrossesCreek
Coordinates38.50491, -89.95561

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length41.0 ft (12.5 m)
Max Span20.0 ft (6.1 m)
Deck Width46.3 ft (14.1 m)
Deck Area176.2 sq m
Main Spans2
Year Built1959

Traffic

Avg Daily Traffic7,300 (2023)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number082005600000000

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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