Structure 35368 · St. Louis County, MO

Is 55 N over Cst 2nd ST

Carries Is 55 N over Cst 2nd ST, S 23 T 45 N R 7 E.

Overall conditionGood

Set by its lowest-rated component: Superstructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating7/9 · Good
Substructure9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT312 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9 · sets the ratingSubstructure 9/9

312 ft end to end, longest span 88 ft: about 4 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 tee-beam bridge.

Built201610 years old
Length312.0 ft95.1 m
Daily traffic22,463counted 2024
Last inspectedSeptember 2024every 24 months

Location

StateMissouri
CountySt. Louis
LocationS 23 T 45 N R 7 E
CarriesIs 55 N
CrossesCst 2nd ST
Coordinates38.61930, -90.18960

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignTee Beam
Total Length312.0 ft (95.1 m)
Max Span87.9 ft (26.8 m)
Deck Width38.7 ft (11.8 m)
Deck Area1122.2 sq m
Main Spans3
Year Built2016

Traffic

Avg Daily Traffic22,463 (2024)
Truck Traffic12%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number35368

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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