Structure 12334300000000 · Clark County, IL

Tr 66a over Unnamed Stream

Carries Tr 66a over Unnamed Stream, 4.3 Mi. NE Of Casey.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT38 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

38 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.

Built20197 years old
Length38.4 ft11.7 m
Daily traffic75counted 2021
Last inspectedFebruary 2022every 48 months

Location

StateIllinois
CountyClark
Location4.3 Mi. NE Of Casey
CarriesTr 66a
CrossesUnnamed Stream
Coordinates39.33979, -87.92772

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length38.4 ft (11.7 m)
Max Span35.8 ft (10.9 m)
Deck Width27.9 ft (8.5 m)
Deck Area99.5 sq m
Main Spans1
Year Built2019

Traffic

Avg Daily Traffic75 (2021)
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2022
Inspection FrequencyEvery 48 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number012334300000000

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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