Structure 87342800000000 · Shelby County, IL

Tr 124 B over Mitchell Creek

Carries Tr 124 B over Mitchell Creek, 3.3 Mi SW Cowden.

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
Substructure8/9 · Very Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT94 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 8/9

94 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 box-beam bridge.

Built198739 years old
Length94.2 ft28.7 m
Daily traffic125counted 2024
Last inspectedMarch 2023every 24 months

Location

StateIllinois
CountyShelby
Location3.3 Mi SW Cowden
CarriesTr 124 B
CrossesMitchell Creek
Coordinates39.22748, -88.91564

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length94.2 ft (28.7 m)
Max Span41.0 ft (12.5 m)
Deck Width24.0 ft (7.3 m)
Deck Area209.5 sq m
Main Spans3
Year Built1987

Traffic

Avg Daily Traffic125 (2024)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number087342800000000

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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