US Bridges

W Florissant Ave over Dellwood CR

FairPosted for load

St. Louis County, Missouri · S 6 T 46 N R 7 E · Structure no. 15665

Built
1967
58 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
28,747
2024 count
Owner
County
County Highway Agency

About this bridge

W Florissant Ave over Dellwood CR is a concrete continuous culvert carrying W Florissant Ave over Dellwood CR in St. Louis County, Missouri. It was built in 1967, so it is 58 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 6 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 28,747 vehicles a day, roughly 10% of them trucks, projected to reach 38,808 by 2044. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesW Florissant Ave
CrossesDellwood CR
LocationS 6 T 46 N R 7 E
RouteCounty Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.75887, -90.27972
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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.4 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 traffic28,747 (2024)
Projected traffic38,808 by 2044
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 W Florissant Ave over Dellwood CR built?

It was built in 1967, making it 58 years old in 2025.

What condition is W Florissant Ave over Dellwood 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 February 2024.

How much traffic does W Florissant Ave over Dellwood CR carry?

About 28,747 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is W Florissant Ave over Dellwood CR?

The structure is 31 ft (9.4 m) long with a longest span of 12 ft (3.7 m).

Who owns W Florissant Ave over Dellwood CR?

It is owned by the County Highway Agency.