Structure 2003600000000 · Alexander County, IL

Fap 312-il 146 over Mississippi River

Carries Fap 312-il 146 over Mississippi River, East Cape Girardeau.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT3,970 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 6/9 · sets the rating

3,970 ft end to end, longest span 1,150 ft: about 11 football fields. 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 cable-stayed bridge.

Built200323 years old
Length3970.1 ft1210.1 m
Daily traffic9,350counted 2023
Last inspectedApril 2024every 24 months

Location

StateIllinois
CountyAlexander
LocationEast Cape Girardeau
CarriesFap 312-il 146
CrossesMississippi River
Coordinates37.29521, -89.51612

Physical Characteristics

MaterialSteel Continuous
DesignStayed Girder
Total Length3970.1 ft (1210.1 m)
Max Span1149.9 ft (350.5 m)
Deck Width96.1 ft (29.3 m)
Deck Area35455.9 sq m
Main Spans3
Year Built2003

Traffic

Avg Daily Traffic9,350 (2023)
Truck Traffic15%
Lanes On Bridge4

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number002003600000000

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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