US Bridges

Clayton RD over Caulks CR

FairPosted for load

St. Louis County, Missouri · S 30 T 45 N R 4 E · Structure no. 15624

Built
1979
46 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
141 ft
3 main spans
Daily traffic
11,751
2024 count
Owner
County
County Highway Agency

About this bridge

Clayton RD over Caulks CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Clayton RD over Caulks CR in St. Louis County, Missouri. It was built in 1979, so it is 46 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 11,751 vehicles a day, roughly 2% of them trucks, projected to reach 15,864 by 2044. The structure is 141 ft (43 m) long and 56 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesClayton RD
CrossesCaulks CR
LocationS 30 T 45 N R 4 E
RouteCounty Highway 0
CountySt. Louis County
StateMissouri
Coordinates38.60683, -90.61785
Functional classUrban Minor 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length141 ft (43 m)
Longest span57 ft (17.4 m)
Deck width56 ft (17.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,751 (2024)
Projected traffic15,864 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Clayton RD over Caulks CR built?

It was built in 1979, making it 46 years old in 2025.

What condition is Clayton RD over Caulks 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 March 2024.

How much traffic does Clayton RD over Caulks CR carry?

About 11,751 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Clayton RD over Caulks CR?

The structure is 141 ft (43 m) long with a longest span of 57 ft (17.4 m) and a deck 56 ft wide.

Who owns Clayton RD over Caulks CR?

It is owned by the County Highway Agency.