Structure 87337700000000 · Shelby County, IL

Tr 181 over Richland Creek

Carries Tr 181 over Richland Creek, 3.8 Mi SW Windsor.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT53 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

53 ft end to end. 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.

Built198343 years old
Length53.1 ft16.2 m
Daily traffic50counted 2024
Last inspectedMarch 2024every 24 months

Location

StateIllinois
CountyShelby
Location3.8 Mi SW Windsor
CarriesTr 181
CrossesRichland Creek
Coordinates39.41163, -88.65186

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length53.1 ft (16.2 m)
Max Span50.9 ft (15.5 m)
Deck Width24.0 ft (7.3 m)
Deck Area118.3 sq m
Main Spans1
Year Built1983

Traffic

Avg Daily Traffic50 (2024)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number087337700000000

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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