US Bridges

Is 29 S over Rt D

FairPosted for load

Platte County, Missouri · S 14 T 52 N R 34 W · Structure no. 1967

Built
1968
57 years old, rebuilt 1985
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
189 ft
4 main spans
Daily traffic
30,543
2024 count
Owner
State
State Highway Agency

About this bridge

Is 29 S over Rt D is a concrete continuous slab carrying Is 29 S over Rt D 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. Its operating status is: posted for load restriction.

It carries about 30,543 vehicles a day, roughly 6% of them trucks, projected to reach 62,613 by 2044. The structure is 189 ft (57.6 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 29 S
CrossesRt D
LocationS 14 T 52 N R 34 W
RouteInterstate 29
Coordinates39.31107, -94.68819
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 statusPosted for load 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 rating57.5 US tons
Inventory rating34.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length189 ft (57.6 m)
Longest span58 ft (17.7 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,543 (2024)
Projected traffic62,613 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 Rt D built?

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

What condition is Is 29 S over Rt D 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 S over Rt D carry?

About 30,543 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Is 29 S over Rt D?

The structure is 189 ft (57.6 m) long with a longest span of 58 ft (17.7 m) and a deck 41 ft wide.

Who owns Is 29 S over Rt D?

It is owned by the State Highway Agency.