Structure 81008600000000 · Rock Island County, IL

Barstow Road over Drainage Ditch

Carries Barstow Road over Drainage Ditch, 1.2 Mi W Ill 5 & 92.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT27 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

27 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 slab bridge.

Built1938rebuilt 1989
Length26.6 ft8.1 m
Daily traffic525counted 2023
Last inspectedOctober 2022every 24 months

Location

StateIllinois
CountyRock Island
Location1.2 Mi W Ill 5 & 92
CarriesBarstow Road
CrossesDrainage Ditch
Coordinates41.51235, -90.37192

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length26.6 ft (8.1 m)
Max Span24.9 ft (7.6 m)
Deck Width37.1 ft (11.3 m)
Deck Area91.5 sq m
Main Spans1
Year Built1938 (reconstructed 1989)

Traffic

Avg Daily Traffic525 (2023)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2022
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number081008600000000

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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