Structure 21000300000000 · Douglas County, IL

I-57 (nb) over Drainage Ditch

Carries I-57 (nb) over Drainage Ditch, .25 Mi N Of Galton.

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
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT111 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

111 ft end to end, longest span 41 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.

Built1968rebuilt 1997
Length110.9 ft33.8 m
Daily traffic10,150counted 2023
Last inspectedOctober 2024every 24 months

Location

StateIllinois
CountyDouglas
Location.25 Mi N Of Galton
CarriesI-57 (nb)
CrossesDrainage Ditch
Coordinates39.74221, -88.29261

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length110.9 ft (33.8 m)
Max Span41.3 ft (12.6 m)
Deck Width44.0 ft (13.4 m)
Deck Area452.9 sq m
Main Spans3
Year Built1968 (reconstructed 1997)

Traffic

Avg Daily Traffic10,150 (2023)
Truck Traffic41%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number021000300000000

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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