US Bridges

Lilac Ave over Watkins CR

FairPosted for load

St. Louis County, Missouri · S 3 T 47 N R 5 E · Structure no. 15664

Built
1964
61 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete Continuous
Length
42 ft
3 main spans
Daily traffic
10,279
2024 count
Owner
County
County Highway Agency

About this bridge

Lilac Ave over Watkins CR is a concrete continuous culvert carrying Lilac Ave over Watkins CR in St. Louis County, Missouri. It was built in 1964, so it is 61 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 10,279 vehicles a day, roughly 4% of them trucks, projected to reach 13,877 by 2044. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesLilac Ave
CrossesWatkins CR
LocationS 3 T 47 N R 5 E
RouteCounty Highway 0
Coordinates38.76234, -90.20655
Functional classUrban Collector

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 protection7 GoodSome minor problems.
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 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 rating38.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,279 (2024)
Projected traffic13,877 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 Lilac Ave over Watkins CR built?

It was built in 1964, making it 61 years old in 2025.

What condition is Lilac Ave over Watkins 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 Lilac Ave over Watkins CR carry?

About 10,279 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Lilac Ave over Watkins CR?

The structure is 42 ft (12.8 m) long with a longest span of 13 ft (4 m).

Who owns Lilac Ave over Watkins CR?

It is owned by the County Highway Agency.