Structure 10620300000000 · Champaign County, IL

John ST (fau 7128) over Copper Slough

Carries John ST (fau 7128) over Copper Slough, .25 Mi W Duncan RD.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating3/9 · Serious
Substructure5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT73 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 3/9 · sets the ratingSubstructure 5/9

73 ft end to end, longest span 23 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 channel-beam bridge.

Built1967rebuilt 2004
Length72.8 ft22.2 m
Daily traffic2,200counted 2021
Last inspectedSeptember 2024every 24 months

Location

StateIllinois
CountyChampaign
Location.25 Mi W Duncan RD
CarriesJohn ST (fau 7128)
CrossesCopper Slough
Coordinates40.10936, -88.29663

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length72.8 ft (22.2 m)
Max Span23.3 ft (7.1 m)
Deck Width33.5 ft (10.2 m)
Deck Area226.4 sq m
Main Spans3
Year Built1967 (reconstructed 2004)

Traffic

Avg Daily Traffic2,200 (2021)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number010620300000000

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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