Structure 100314700000000 · Williamson County, IL

Tr 605 over Cana Creek

Carries Tr 605 over Cana Creek, 0.5 M NW Crealspgs.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT52 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

52 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.

Built199036 years old
Length51.5 ft15.7 m
Daily traffic100counted 2021
Last inspectedJanuary 2023every 48 months

Location

StateIllinois
CountyWilliamson
Location0.5 M NW Crealspgs
CarriesTr 605
CrossesCana Creek
Coordinates37.62661, -88.85240

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length51.5 ft (15.7 m)
Max Span48.9 ft (14.9 m)
Deck Width24.3 ft (7.4 m)
Deck Area116.2 sq m
Main Spans1
Year Built1990

Traffic

Avg Daily Traffic100 (2021)
Truck Traffic21%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2023
Inspection FrequencyEvery 48 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number100314700000000

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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