Structure 60610200000000 · Madison County, IL

N Seminary /fau 89 over Black Creek

Carries N Seminary /fau 89 over Black Creek, 0.25 N Beltline.

Overall conditionPoor

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

How ratings work
Deck5/9 · Fair
Superstructuresets the rating3/9 · Serious
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT77 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 3/9 · sets the ratingSubstructure 6/9

77 ft end to end, longest span 27 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.

Built1966rebuilt 1991
Length77.4 ft23.6 m
Daily traffic5,100counted 2024
Last inspectedJanuary 2024every 24 months

Location

StateIllinois
CountyMadison
Location0.25 N Beltline
CarriesN Seminary /fau 89
CrossesBlack Creek
Coordinates38.91838, -90.14259

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length77.4 ft (23.6 m)
Max Span27.2 ft (8.3 m)
Deck Width39.0 ft (11.9 m)
Deck Area280.8 sq m
Main Spans3
Year Built1966 (reconstructed 1991)

Traffic

Avg Daily Traffic5,100 (2024)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number060610200000000

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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