Structure 37017800000000 · Henry County, IL

US RT 6 over Mineral Creek

Carries US RT 6 over Mineral Creek, 1.2 Mi E Osco RD.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT81 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

81 ft end to end, longest span 31 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a slab bridge.

Built201412 years old
Length81.4 ft24.8 m
Daily traffic3,100counted 2023
Last inspectedOctober 2024every 48 months

Location

StateIllinois
CountyHenry
Location1.2 Mi E Osco RD
CarriesUS RT 6
CrossesMineral Creek
Coordinates41.45468, -90.29564

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length81.4 ft (24.8 m)
Max Span30.8 ft (9.4 m)
Deck Width43.3 ft (13.2 m)
Deck Area327.4 sq m
Main Spans3
Year Built2014

Traffic

Avg Daily Traffic3,100 (2023)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number037017800000000

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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