Structure 57521200000000 · McLean County, IL

Fas 479 Ch 59 over Sugar Creek

Carries Fas 479 Ch 59 over Sugar Creek, 1.5 Mi Nnw Mclean.

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
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT164 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

164 ft end to end, longest span 38 ft: about 2 semi-trucks nose to tail. Lengths and the semi-truck 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.

Built197551 years old
Length164.0 ft50 m
Daily traffic400counted 2024
Last inspectedMarch 2024every 24 months

Location

StateIllinois
CountyMcLean
Location1.5 Mi Nnw Mclean
CarriesFas 479 Ch 59
CrossesSugar Creek
Coordinates40.33719, -89.19460

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length164.0 ft (50 m)
Max Span38.1 ft (11.6 m)
Deck Width29.9 ft (9.1 m)
Deck Area455 sq m
Main Spans5
Year Built1975

Traffic

Avg Daily Traffic400 (2024)
Truck Traffic33%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number057521200000000

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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