US Bridges

West Florissant Av over Trra RR

PoorPosted for load

St. Louis city, Missouri · S 33 T 46 N R 7 E · Structure no. 324

Built
1959
66 years old
Condition
Poor
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
79 ft
1 main span
Daily traffic
17,689
2024 count
Owner
State
State Highway Agency

About this bridge

West Florissant Av over Trra RR is a steel stringer/multi-beam or girder carrying West Florissant Av over Trra RR in St. Louis city, Missouri. It was built in 1959, so it is 66 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 17,689 vehicles a day, roughly 5% of them trucks, projected to reach 24,765 by 2044. The structure is 79 ft (24.1 m) long and 112 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesWest Florissant Av
CrossesTrra RR
LocationS 33 T 46 N R 7 E
RouteCity Street 0
CountySt. Louis city
StateMissouri
Coordinates38.6837, -90.22893
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length79 ft (24.1 m)
Longest span79 ft (24.1 m)
Deck width112 ft (34.1 m)
Roadway width90 ft (27.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,689 (2024)
Projected traffic24,765 by 2044
Trucks5%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.5 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was West Florissant Av over Trra RR built?

It was built in 1959, making it 66 years old in 2025.

What condition is West Florissant Av over Trra RR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2025.

How much traffic does West Florissant Av over Trra RR carry?

About 17,689 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is West Florissant Av over Trra RR?

The structure is 79 ft (24.1 m) long with a longest span of 79 ft (24.1 m) and a deck 112 ft wide.

Who owns West Florissant Av over Trra RR?

It is owned by the State Highway Agency.