Structure 37338500000000 · Henry County, IL

Ch 19 over Hillery Creek

Carries Ch 19 over Hillery Creek, 3 Mi S Cambridge.

Overall conditionGood

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

How ratings work
Decksets the rating9/9 · Excellent
Superstructuresets the rating9/9 · Excellent
Substructuresets the rating9/9 · Excellent
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT80 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 9/9Substructure 9/9

80 ft end to end. 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 box-beam bridge.

Built20242 years old
Length80.1 ft24.4 m
Daily traffic325counted 2020
Last inspectedAugust 2024every 24 months

Location

StateIllinois
CountyHenry
Location3 Mi S Cambridge
CarriesCh 19
CrossesHillery Creek
Coordinates41.25103, -90.18842

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length80.1 ft (24.4 m)
Max Span77.4 ft (23.6 m)
Deck Width29.9 ft (9.1 m)
Deck Area222.0 sq m
Main Spans1
Year Built2024

Traffic

Avg Daily Traffic325 (2020)
Truck Traffic40%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number037338500000000

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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