Structure 37200000000000 · Henry County, IL

I74 & I280 over Turner Creek

Carries I74 & I280 over Turner Creek, 2 Mi W Int I74 & I80.

Overall conditionFair

Set by its lowest-rated component: Culvert at 6 of 9.

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT31 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 31 ft across with 3 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.

Built196264 years old
Length30.8 ft9.4 m
Daily traffic15,000counted 2023
Last inspectedJanuary 2023every 24 months

Location

StateIllinois
CountyHenry
Location2 Mi W Int I74 & I80
CarriesI74 & I280
CrossesTurner Creek
Coordinates41.44389, -90.36386

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length30.8 ft (9.4 m)
Max Span9.8 ft (3 m)
Deck Area114.7 sq m
Main Spans3
Year Built1962

Traffic

Avg Daily Traffic15,000 (2023)
Truck Traffic33%
Lanes On Bridge4

Inspection & Ownership

Last InspectionJanuary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number037200000000000

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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