US Bridges

Lansdowne Ave over Rvr Des Peres

Fair

St. Louis city, Missouri · S 35 T 45 N R 6 E · Structure no. 29759

Built
2003
22 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
278 ft
3 main spans
Daily traffic
17,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lansdowne Ave over Rvr Des Peres is a steel continuous stringer/multi-beam or girder carrying Lansdowne 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 17,000 vehicles a day, roughly 2% of them trucks, projected to reach 22,950 by 2043. The structure is 278 ft (84.7 m) long and 95 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLansdowne Ave
CrossesRvr Des Peres
LocationS 35 T 45 N R 6 E
RouteCity Street 0
CountySt. Louis city
StateMissouri
Coordinates38.59213, -90.31767
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.3 US tons
Inventory rating52.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length278 ft (84.7 m)
Longest span120 ft (36.6 m)
Deck width95 ft (29.1 m)
Roadway width69 ft (21 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,000 (2023)
Projected traffic22,950 by 2043
Trucks2%
Lanes on structure6
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lansdowne Ave over Rvr Des Peres built?

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

What condition is Lansdowne Ave over Rvr Des Peres in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

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

About 17,000 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Lansdowne Ave over Rvr Des Peres?

The structure is 278 ft (84.7 m) long with a longest span of 120 ft (36.6 m) and a deck 95 ft wide.

Who owns Lansdowne Ave over Rvr Des Peres?

It is owned by the City or Municipal Highway Agency.