US Bridges

Mo 340 E over Creve Coeur CR

FairPosted for load

St. Louis County, Missouri · S 32 T 46 N R 5 E · Structure no. 1312

Built
1968
57 years old, rebuilt 1991
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
186 ft
3 main spans
Daily traffic
15,056
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 340 E over Creve Coeur CR is a steel continuous stringer/multi-beam or girder carrying Mo 340 E over Creve Coeur CR in St. Louis County, Missouri. It was built in 1968 and reconstructed in 1991, so it is 57 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. Its operating status is: posted for load restriction.

It carries about 15,056 vehicles a day, roughly 7% of them trucks, projected to reach 21,078 by 2044. The structure is 186 ft (56.7 m) long and 78 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesMo 340 E
CrossesCreve Coeur CR
LocationS 32 T 46 N R 5 E
RouteState Highway 340
CountySt. Louis County
StateMissouri
Coordinates38.68222, -90.48839
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating34.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length186 ft (56.7 m)
Longest span70 ft (21.3 m)
Deck width78 ft (23.9 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,056 (2024)
Projected traffic21,078 by 2044
Trucks7%
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 Creve Coeur CR built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1991.

What condition is Mo 340 E over Creve Coeur CR 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 October 2024.

How much traffic does Mo 340 E over Creve Coeur CR carry?

About 15,056 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Mo 340 E over Creve Coeur CR?

The structure is 186 ft (56.7 m) long with a longest span of 70 ft (21.3 m) and a deck 78 ft wide.

Who owns Mo 340 E over Creve Coeur CR?

It is owned by the State Highway Agency.