Structure 32973 · St. Louis County, MO

Mo 340 E over Mo 141

Carries Mo 340 E over Mo 141, S 367 T 46 N R 5 E.

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
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT96 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 7/9

96 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 multi-beam bridge.

Built201115 years old
Length96.5 ft29.4 m
Daily traffic15,056counted 2024
Last inspectedOctober 2024every 24 months

Location

StateMissouri
CountySt. Louis
LocationS 367 T 46 N R 5 E
CarriesMo 340 E
CrossesMo 141
Coordinates38.68136, -90.49336

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length96.5 ft (29.4 m)
Max Span94.2 ft (28.7 m)
Deck Width179.1 ft (54.6 m)
Deck Area1605.2 sq m
Main Spans1
Year Built2011

Traffic

Avg Daily Traffic15,056 (2024)
Truck Traffic7%
Lanes On Bridge8
Lanes Under Bridge4

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number32973

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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