Structure 81605200000000 · Rock Island County, IL

52nd AVE over Drainage Ditch

Carries 52nd AVE over Drainage Ditch, SW Moline.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT63 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 6/9 · sets the ratingSubstructure 7/9

63 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 multi-beam bridge.

Built1975rebuilt 2003
Length63.0 ft19.2 m
Daily traffic3,350counted 2020
Last inspectedOctober 2024every 24 months

Location

StateIllinois
CountyRock Island
LocationSW Moline
Carries52nd AVE
CrossesDrainage Ditch
Coordinates41.46408, -90.50675

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length63.0 ft (19.2 m)
Max Span58.1 ft (17.7 m)
Deck Width69.9 ft (21.3 m)
Deck Area409.0 sq m
Main Spans1
Year Built1975 (reconstructed 2003)

Traffic

Avg Daily Traffic3,350 (2020)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number081605200000000

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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