Structure 57451500000000 · McLean County, IL

Tr 589 over Prairie Creek

Carries Tr 589 over Prairie Creek, 2.5 Mi SE Mclean.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT73 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

73 ft end to end, longest span 27 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.

Built197353 years old
Length73.2 ft22.3 m
Daily traffic50counted 2024
Last inspectedFebruary 2024every 24 months

Location

StateIllinois
CountyMcLean
Location2.5 Mi SE Mclean
CarriesTr 589
CrossesPrairie Creek
Coordinates40.28985, -89.11336

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length73.2 ft (22.3 m)
Max Span26.9 ft (8.2 m)
Deck Width25.9 ft (7.9 m)
Deck Area176.2 sq m
Main Spans3
Year Built1973

Traffic

Avg Daily Traffic50 (2024)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number057451500000000

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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