Structure 60008400000000 · Madison County, IL

Il 159 & Il 143 over Nsrr

Carries Il 159 & Il 143 over Nsrr, 0.1 Mi NW Edwrdsvlle.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT153 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 8/9

153 ft end to end, longest span 59 ft: about 2 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.

Built1936rebuilt 1991
Length152.6 ft46.5 m
Daily traffic11,500counted 2023
Last inspectedMay 2024every 24 months

Location

StateIllinois
CountyMadison
Location0.1 Mi NW Edwrdsvlle
CarriesIl 159 & Il 143
CrossesNsrr
Coordinates38.82355, -89.97180

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length152.6 ft (46.5 m)
Max Span59.1 ft (18 m)
Deck Width55.1 ft (16.8 m)
Deck Area781.2 sq m
Main Spans3
Year Built1936 (reconstructed 1991)

Traffic

Avg Daily Traffic11,500 (2023)
Truck Traffic4%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number060008400000000

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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