US Bridges

Is 29 S over Cst N Davidson RD

Fair

Clay County, Missouri · S 1 T 50 N R 33 W · Structure no. 6438

Built
1955
70 years old, rebuilt 1979
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
138 ft
3 main spans
Daily traffic
43,876
2024 count
Owner
State
State Highway Agency

About this bridge

Is 29 S over Cst N Davidson RD is a prestressed concrete continuous stringer/multi-beam or girder carrying Is 29 S over Cst N Davidson RD in Clay County, Missouri. It was built in 1955 and reconstructed in 1979, so it is 70 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.

It carries about 43,876 vehicles a day, roughly 6% of them trucks, projected to reach 78,977 by 2044. The structure is 138 ft (42.1 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 29 S
CrossesCst N Davidson RD
LocationS 1 T 50 N R 33 W
RouteInterstate 29
Coordinates39.17418, -94.55996
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating39.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length138 ft (42.1 m)
Longest span63 ft (19.1 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,876 (2024)
Projected traffic78,977 by 2044
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 29 S over Cst N Davidson RD built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1979.

What condition is Is 29 S over Cst N Davidson RD 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 September 2024.

How much traffic does Is 29 S over Cst N Davidson RD carry?

About 43,876 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Is 29 S over Cst N Davidson RD?

The structure is 138 ft (42.1 m) long with a longest span of 63 ft (19.1 m) and a deck 43 ft wide.

Who owns Is 29 S over Cst N Davidson RD?

It is owned by the State Highway Agency.