US Bridges

North American Ave over Is 29

Fair

Platte County, Missouri · S 11 T 53 N R 35 W · Structure no. 86

Built
1958
67 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete Continuous
Length
207 ft
4 main spans
Daily traffic
86
2024 count
Owner
State
State Highway Agency

About this bridge

North American Ave over Is 29 is a concrete continuous slab carrying North American Ave over Is 29 in Platte County, Missouri. It was built in 1958, so it is 67 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 86 vehicles a day, roughly 12% of them trucks, projected to reach 155 by 2044. The structure is 207 ft (63.1 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesNorth American Ave
CrossesIs 29
LocationS 11 T 53 N R 35 W
RouteCounty Highway 0
Coordinates39.41895, -94.78976
Functional classRural Local

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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating24.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length207 ft (63.1 m)
Longest span56 ft (17.1 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic86 (2024)
Projected traffic155 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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 North American Ave over Is 29 built?

It was built in 1958, making it 67 years old in 2025.

What condition is North American Ave over Is 29 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 North American Ave over Is 29 carry?

About 86 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is North American Ave over Is 29?

The structure is 207 ft (63.1 m) long with a longest span of 56 ft (17.1 m) and a deck 27 ft wide.

Who owns North American Ave over Is 29?

It is owned by the State Highway Agency.