US Bridges

Is 29 N over US 169

Fair

Clay County, Missouri · S 34 T 51 N R 33 W · Structure no. 1306

Built
1965
60 years old, rebuilt 1989
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
155 ft
3 main spans
Daily traffic
50,873
2024 count
Owner
State
State Highway Agency

About this bridge

Is 29 N over US 169 is a concrete continuous slab carrying Is 29 N over US 169 in Clay County, Missouri. It was built in 1965 and reconstructed in 1989, 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 5 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 50,873 vehicles a day, roughly 6% of them trucks, projected to reach 91,571 by 2044. The structure is 155 ft (47.2 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIs 29 N
CrossesUS 169
LocationS 34 T 51 N R 33 W
RouteInterstate 29
CountyClay County
StateMissouri
Coordinates39.18407, -94.59103
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.4 US tons
Inventory rating48.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length155 ft (47.2 m)
Longest span60 ft (18.3 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50,873 (2024)
Projected traffic91,571 by 2044
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 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 US 169 built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1989.

What condition is Is 29 N over US 169 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 September 2024.

How much traffic does Is 29 N over US 169 carry?

About 50,873 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Is 29 N over US 169?

The structure is 155 ft (47.2 m) long with a longest span of 60 ft (18.3 m) and a deck 40 ft wide.

Who owns Is 29 N over US 169?

It is owned by the State Highway Agency.