US Bridges

Mo 340 E over Rvr Des Peres

Fair

St. Louis County, Missouri · S 4 T 45 N R 6 E · Structure no. 540

Built
1962
63 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
35 ft
2 main spans
Daily traffic
12,270
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 340 E over Rvr Des Peres is a concrete continuous culvert carrying Mo 340 E over Rvr Des Peres in St. Louis County, Missouri. It was built in 1962, so it is 63 years old, older 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 12,270 vehicles a day, roughly 3% of them trucks, projected to reach 17,178 by 2044. The structure is 35 ft (10.8 m) long. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesMo 340 E
CrossesRvr Des Peres
LocationS 4 T 45 N R 6 E
RouteState Highway 340
CountySt. Louis County
StateMissouri
Coordinates38.67359, -90.3475
Functional classUrban Other Principal 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length35 ft (10.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,270 (2024)
Projected traffic17,178 by 2044
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Mo 340 E over Rvr Des Peres built?

It was built in 1962, making it 63 years old in 2025.

What condition is Mo 340 E 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 November 2023.

How much traffic does Mo 340 E over Rvr Des Peres carry?

About 12,270 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Mo 340 E over Rvr Des Peres?

The structure is 35 ft (10.8 m) long with a longest span of 12 ft (3.7 m).

Who owns Mo 340 E over Rvr Des Peres?

It is owned by the State Highway Agency.