Structure 81013500000000 · Rock Island County, IL

I-88 EB over Meredosia Ditch

Carries I-88 EB over Meredosia Ditch, At Whiteside Co LN.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT233 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

233 ft end to end, longest span 92 ft: about 3 semi-trucks nose to tail. Lengths and the semi-truck 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.

Built1976rebuilt 2022
Length233.3 ft71.1 m
Daily traffic6,250counted 2023
Last inspectedApril 2023every 24 months

Location

StateIllinois
CountyRock Island
LocationAt Whiteside Co LN
CarriesI-88 EB
CrossesMeredosia Ditch
Coordinates41.64141, -90.16611

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length233.3 ft (71.1 m)
Max Span92.2 ft (28.1 m)
Deck Width42.0 ft (12.8 m)
Deck Area910.1 sq m
Main Spans3
Year Built1976 (reconstructed 2022)

Traffic

Avg Daily Traffic6,250 (2023)
Truck Traffic33%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number081013500000000

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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