Structure 37335400000000 · Henry County, IL

Tr-257 over Spring Creek

Carries Tr-257 over Spring Creek, 1200n/1680e.

Overall conditionFair

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

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT28 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 28 ft across with 2 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.

Built1947rebuilt 2003
Length27.6 ft8.4 m
Daily traffic25counted 2020
Last inspectedSeptember 2024every 24 months

Location

StateIllinois
CountyHenry
Location1200n/1680e
CarriesTr-257
CrossesSpring Creek
Coordinates41.32439, -90.11180

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length27.6 ft (8.4 m)
Max Span10.8 ft (3.3 m)
Deck Area61.3 sq m
Main Spans2
Year Built1947 (reconstructed 2003)

Traffic

Avg Daily Traffic25 (2020)
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number037335400000000

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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