US Bridges

US 169 N over Cst Harlem RD

Fair

Clay County, Missouri · S 26 T 50 N R 33 W · Structure no. 3805

Built
1955
70 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
61 ft
1 main span
Daily traffic
20,786
2024 count
Owner
State
State Highway Agency

About this bridge

US 169 N over Cst Harlem RD is a concrete slab carrying US 169 N over Cst Harlem RD in Clay County, Missouri. It was built in 1955, so it is 70 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 20,786 vehicles a day, roughly 5% of them trucks, projected to reach 37,415 by 2044. The structure is 61 ft (18.6 m) long and 24 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS 169 N
CrossesCst Harlem RD
LocationS 26 T 50 N R 33 W
RouteU.S. Route 169
CountyClay County
StateMissouri
Coordinates39.11692, -94.59064
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.6 US tons
Inventory rating28.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span61 ft (18.6 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,786 (2024)
Projected traffic37,415 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$529,000 (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 169 N over Cst Harlem RD built?

It was built in 1955, making it 70 years old in 2025.

What condition is US 169 N over Cst Harlem RD 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 Cst Harlem RD carry?

About 20,786 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is US 169 N over Cst Harlem RD?

The structure is 61 ft (18.6 m) long with a longest span of 61 ft (18.6 m) and a deck 24 ft wide.

Who owns US 169 N over Cst Harlem RD?

It is owned by the State Highway Agency.