US Bridges

Is 229 S over Cst Ajax RD Whitehead C

Fair

Buchanan County, Missouri · S 34 T 57 N R 35 W · Structure no. 1019

Built
1965
60 years old, rebuilt 1984
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
347 ft
5 main spans
Daily traffic
11,636
2024 count
Owner
State
State Highway Agency

About this bridge

Is 229 S over Cst Ajax RD Whitehead C is a steel continuous stringer/multi-beam or girder carrying Is 229 S over Cst Ajax RD Whitehead C in Buchanan County, Missouri. It was built in 1965 and reconstructed in 1984, so it is 60 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 11,636 vehicles a day, roughly 22% of them trucks, projected to reach 19,781 by 2044. The structure is 347 ft (105.8 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 229 S
CrossesCst Ajax RD Whitehead C
LocationS 34 T 57 N R 35 W
RouteInterstate 229
Coordinates39.71488, -94.81414
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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.4 US tons
Inventory rating41.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length347 ft (105.8 m)
Longest span75 ft (22.9 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,636 (2024)
Projected traffic19,781 by 2044
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 229 S over Cst Ajax RD Whitehead C built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1984.

What condition is Is 229 S over Cst Ajax RD Whitehead C 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 August 2024.

How much traffic does Is 229 S over Cst Ajax RD Whitehead C carry?

About 11,636 vehicles per day (2024 count), of which roughly 22% are trucks.

How long is Is 229 S over Cst Ajax RD Whitehead C?

The structure is 347 ft (105.8 m) long with a longest span of 75 ft (22.9 m) and a deck 34 ft wide.

Who owns Is 229 S over Cst Ajax RD Whitehead C?

It is owned by the State Highway Agency.