US Bridges

Is 229 N over Cst Oak ST

Fair

Buchanan County, Missouri · S 20 T 57 N R 35 W · Structure no. 1925

Built
1979
46 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
134 ft
3 main spans
Daily traffic
3,331
2024 count
Owner
State
State Highway Agency

About this bridge

Is 229 N over Cst Oak ST is a concrete continuous slab carrying Is 229 N over Cst Oak ST in Buchanan 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 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 3,331 vehicles a day, roughly 7% of them trucks, projected to reach 5,663 by 2044. The structure is 134 ft (40.8 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 229 N
CrossesCst Oak ST
LocationS 20 T 57 N R 35 W
RouteInterstate 229
CountyBuchanan County
StateMissouri
Coordinates39.74342, -94.85345
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.4 US tons
Inventory rating43.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length134 ft (40.8 m)
Longest span63 ft (19.2 m)
Deck width42 ft (12.9 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,331 (2024)
Projected traffic5,663 by 2044
Trucks7%
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 229 N over Cst Oak ST built?

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

What condition is Is 229 N over Cst Oak ST 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 July 2024.

How much traffic does Is 229 N over Cst Oak ST carry?

About 3,331 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Is 229 N over Cst Oak ST?

The structure is 134 ft (40.8 m) long with a longest span of 63 ft (19.2 m) and a deck 42 ft wide.

Who owns Is 229 N over Cst Oak ST?

It is owned by the State Highway Agency.