US Bridges

Is 29 S over Cst N Oak Trfy

Fair

Clay County, Missouri · S 2 T 50 N R 33 W · Structure no. 6441

Built
1957
68 years old, rebuilt 1989
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
182 ft
4 main spans
Daily traffic
58,966
2024 count
Owner
State
State Highway Agency

About this bridge

Is 29 S over Cst N Oak Trfy is a steel continuous stringer/multi-beam or girder carrying Is 29 S over Cst N Oak Trfy in Clay County, Missouri. It was built in 1957 and reconstructed in 1989, so it is 68 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 58,966 vehicles a day, roughly 6% of them trucks, projected to reach 106,139 by 2044. The structure is 182 ft (55.5 m) long and 47 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 29 S
CrossesCst N Oak Trfy
LocationS 2 T 50 N R 33 W
RouteInterstate 29
Coordinates39.17943, -94.57666
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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.4 US tons
Inventory rating43.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length182 ft (55.5 m)
Longest span52 ft (15.8 m)
Deck width47 ft (14.4 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,966 (2024)
Projected traffic106,139 by 2044
Trucks6%
Lanes on structure3
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.7 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 29 S over Cst N Oak Trfy built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1989.

What condition is Is 29 S over Cst N Oak Trfy 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 Oak Trfy carry?

About 58,966 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Is 29 S over Cst N Oak Trfy?

The structure is 182 ft (55.5 m) long with a longest span of 52 ft (15.8 m) and a deck 47 ft wide.

Who owns Is 29 S over Cst N Oak Trfy?

It is owned by the State Highway Agency.