Structure 57203300000000 · McLean County, IL

I-74 over Drainage Ditch

Carries I-74 over Drainage Ditch, 10.39 M E Of Bs51.

Overall conditionFair

Set by its lowest-rated component: Culvert at 5 of 9.

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
25 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 25 ft across with 2 openings. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built196957 years old
Length24.9 ft7.6 m
Daily traffic21,600counted 2023
Last inspectedMay 2024every 24 months

Location

StateIllinois
CountyMcLean
Location10.39 M E Of Bs51
CarriesI-74
CrossesDrainage Ditch
Coordinates40.36463, -88.82093

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length24.9 ft (7.6 m)
Max Span12.1 ft (3.7 m)
Deck Area185.4 sq m
Main Spans2
Year Built1969

Traffic

Avg Daily Traffic21,600 (2023)
Truck Traffic35%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number057203300000000

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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