US Bridges

US 169 N over Mo 9

FairPosted for load

Clay County, Missouri · S 10 T 50 N R 33 W · Structure no. 1301

Built
1965
60 years old, rebuilt 2007
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
201 ft
3 main spans
Daily traffic
21,563
2024 count
Owner
State
State Highway Agency

About this bridge

US 169 N over Mo 9 is a steel continuous stringer/multi-beam or girder carrying US 169 N over Mo 9 in Clay County, Missouri. It was built in 1965 and reconstructed in 2007, 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 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 21,563 vehicles a day, roughly 5% of them trucks, projected to reach 38,813 by 2044. The structure is 201 ft (61.3 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS 169 N
CrossesMo 9
LocationS 10 T 50 N R 33 W
RouteU.S. Route 169
CountyClay County
StateMissouri
Coordinates39.15866, -94.58897
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 alignment7: Better than present minimum criteria
Operating rating53.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length201 ft (61.3 m)
Longest span78 ft (23.8 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,563 (2024)
Projected traffic38,813 by 2044
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 US 169 N over Mo 9 built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2007.

What condition is US 169 N over Mo 9 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 US 169 N over Mo 9 carry?

About 21,563 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is US 169 N over Mo 9?

The structure is 201 ft (61.3 m) long with a longest span of 78 ft (23.8 m) and a deck 35 ft wide.

Who owns US 169 N over Mo 9?

It is owned by the State Highway Agency.