Structure 57530700000000 · McLean County, IL

Fas 1472 Ch 31 over Six Mile Creek

Carries Fas 1472 Ch 31 over Six Mile Creek, 2.0 Mi W Towanda.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets 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 FT53 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 53 ft across with 4 openings. 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, so those are drawn as typical for a culvert.

Built20206 years old
Length53.1 ft16.2 m
Daily traffic2,150counted 2024
Last inspectedNovember 2022every 48 months

Location

StateIllinois
CountyMcLean
Location2.0 Mi W Towanda
CarriesFas 1472 Ch 31
CrossesSix Mile Creek
Coordinates40.56327, -88.94450

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length53.1 ft (16.2 m)
Max Span12.8 ft (3.9 m)
Deck Width40.0 ft (12.2 m)
Deck Area197.6 sq m
Main Spans4
Year Built2020

Traffic

Avg Daily Traffic2,150 (2024)
Truck Traffic19%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2022
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number057530700000000

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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