Structure 32031 · St. Louis County, MO

16th ST over Metrolink

Carries 16th ST over Metrolink, S 363 T 45 N R 7 E.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT126 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 8/9

126 ft end to end, longest span 50 ft. 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.

Built199135 years old
Length126.0 ft38.4 m
Daily traffic14,500counted 2023
Last inspectedApril 2023every 24 months

Location

StateMissouri
CountySt. Louis
LocationS 363 T 45 N R 7 E
Carries16th ST
CrossesMetrolink
Coordinates38.62616, -90.20484

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignTee Beam
Total Length126.0 ft (38.4 m)
Max Span49.5 ft (15.1 m)
Deck Width64.6 ft (19.7 m)
Deck Area756.5 sq m
Main Spans3
Year Built1991

Traffic

Avg Daily Traffic14,500 (2023)
Truck Traffic5%
Lanes On Bridge4

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerOther Local Agencies
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number32031

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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