Structure 81200500000000 · Rock Island County, IL

Ill Route 84 over Sugar CR

Carries Ill Route 84 over Sugar CR, 1 Mi N Ill92-e Molin.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT39 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 39 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.

Built197452 years old
Length39.0 ft11.9 m
Daily traffic3,400counted 2023
Last inspectedApril 2024every 24 months

Location

StateIllinois
CountyRock Island
Location1 Mi N Ill92-e Molin
CarriesIll Route 84
CrossesSugar CR
Coordinates41.52875, -90.42551

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length39.0 ft (11.9 m)
Max Span12.8 ft (3.9 m)
Deck Area152.3 sq m
Main Spans3
Year Built1974

Traffic

Avg Daily Traffic3,400 (2023)
Truck Traffic5%
Lanes On Bridge4

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number081200500000000

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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