US Bridges

Leffingwell Ave over Gravois Crk

Fair

St. Louis County, Missouri · S 7 T 44 N R 6 E · Structure no. 36765

Built
1973
52 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
174 ft
1 main span
Daily traffic
2,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Leffingwell Ave over Gravois Crk is a concrete culvert carrying Leffingwell Ave over Gravois Crk in St. Louis County, Missouri. It was built in 1973, so it is 52 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 2,000 vehicles a day, roughly 10% of them trucks, projected to reach 3,200 by 2044. The structure is 174 ft (53 m) long and 8 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLeffingwell Ave
CrossesGravois Crk
LocationS 7 T 44 N R 6 E
RouteCity Street 228
CountySt. Louis County
StateMissouri
Coordinates38.57185, -90.39557
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
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 alignment6: Equal to present minimum criteria
Operating rating91.3 US tons
Inventory rating54.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length174 ft (53 m)
Longest span10 ft (3.2 m)
Deck width8 ft (2.4 m)
Roadway width8 ft (2.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2024)
Projected traffic3,200 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$153,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Leffingwell Ave over Gravois Crk built?

It was built in 1973, making it 52 years old in 2025.

What condition is Leffingwell Ave over Gravois Crk 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 January 2024.

How much traffic does Leffingwell Ave over Gravois Crk carry?

About 2,000 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Leffingwell Ave over Gravois Crk?

The structure is 174 ft (53 m) long with a longest span of 10 ft (3.2 m) and a deck 8 ft wide.

Who owns Leffingwell Ave over Gravois Crk?

It is owned by the City or Municipal Highway Agency.