US Bridges

Southwest Ave over Rvr Des Peres

Good

St. Louis city, Missouri · S 2037 T 45 N R 6 E · Structure no. 29486

Built
2003
22 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
168 ft
3 main spans
Daily traffic
12,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Southwest Ave over Rvr Des Peres is a prestressed concrete continuous stringer/multi-beam or girder carrying Southwest Ave over Rvr Des Peres in St. Louis city, Missouri. It was built in 2003, so it is 22 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 12,000 vehicles a day, roughly 5% of them trucks, projected to reach 16,200 by 2044. The structure is 168 ft (51.1 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSouthwest Ave
CrossesRvr Des Peres
LocationS 2037 T 45 N R 6 E
RouteCity Street 0
Coordinates38.61343, -90.30386
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.4 US tons
Inventory rating42.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length168 ft (51.1 m)
Longest span66 ft (20.1 m)
Deck width49 ft (14.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,000 (2024)
Projected traffic16,200 by 2044
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Southwest Ave over Rvr Des Peres built?

It was built in 2003, making it 22 years old in 2025.

What condition is Southwest Ave over Rvr Des Peres in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does Southwest Ave over Rvr Des Peres carry?

About 12,000 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Southwest Ave over Rvr Des Peres?

The structure is 168 ft (51.1 m) long with a longest span of 66 ft (20.1 m) and a deck 49 ft wide.

Who owns Southwest Ave over Rvr Des Peres?

It is owned by the City or Municipal Highway Agency.