US Bridges

Is 29 N over Cst NW 112th ST

Fair

Platte County, Missouri · S 36 T 52 N R 34 W · Structure no. 1440

Built
1968
57 years old, rebuilt 1985
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
160 ft
3 main spans
Daily traffic
31,398
2024 count
Owner
State
State Highway Agency

About this bridge

Is 29 N over Cst NW 112th ST is a concrete continuous slab carrying Is 29 N over Cst NW 112th ST in Platte County, Missouri. It was built in 1968 and reconstructed in 1985, so it is 57 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 31,398 vehicles a day, roughly 6% of them trucks, projected to reach 64,366 by 2044. The structure is 160 ft (48.8 m) long and 52 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 29 N
CrossesCst NW 112th ST
LocationS 36 T 52 N R 34 W
RouteInterstate 29
Coordinates39.29633, -94.68525
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating45.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length160 ft (48.8 m)
Longest span71 ft (21.6 m)
Deck width52 ft (15.8 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,398 (2024)
Projected traffic64,366 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 29 N over Cst NW 112th ST built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1985.

What condition is Is 29 N over Cst NW 112th 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 October 2024.

How much traffic does Is 29 N over Cst NW 112th ST carry?

About 31,398 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Is 29 N over Cst NW 112th ST?

The structure is 160 ft (48.8 m) long with a longest span of 71 ft (21.6 m) and a deck 52 ft wide.

Who owns Is 29 N over Cst NW 112th ST?

It is owned by the State Highway Agency.