Structure 36002200000000 · Henderson County, IL

Ill 94 over Henderson Overflow

Carries Ill 94 over Henderson Overflow, 1 Mi S Bald Bluff.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT103 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

103 ft end to end, longest span 49 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 multi-beam bridge.

Built1934rebuilt 1991
Length103.3 ft31.5 m
Daily traffic275counted 2023
Last inspectedOctober 2024every 24 months

Location

StateIllinois
CountyHenderson
Location1 Mi S Bald Bluff
CarriesIll 94
CrossesHenderson Overflow
Coordinates41.00666, -90.85352

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length103.3 ft (31.5 m)
Max Span49.2 ft (15 m)
Deck Width35.1 ft (10.7 m)
Deck Area337.1 sq m
Main Spans2
Year Built1934 (reconstructed 1991)

Traffic

Avg Daily Traffic275 (2023)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number036002200000000

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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