US Bridges

Rp US169S to MO9N over Mo 9

FairPosted for load

Clay County, Missouri · S 10 T 50 N R 33 W · Structure no. 1297

Built
1965
60 years old, rebuilt 1975
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
189 ft
3 main spans
Daily traffic
7,890
2024 count
Owner
State
State Highway Agency

About this bridge

Rp US169S to MO9N over Mo 9 is a steel continuous stringer/multi-beam or girder carrying Rp US169S to MO9N over Mo 9 in Clay County, Missouri. It was built in 1965 and reconstructed in 1975, 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 7,890 vehicles a day, roughly 5% of them trucks, projected to reach 14,202 by 2044. The structure is 189 ft (57.6 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesRp US169S to MO9N
CrossesMo 9
LocationS 10 T 50 N R 33 W
RouteState Highway 0
CountyClay County
StateMissouri
Coordinates39.16141, -94.59009
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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length189 ft (57.6 m)
Longest span72 ft (22 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,890 (2024)
Projected traffic14,202 by 2044
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 Rp US169S to MO9N over Mo 9 built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1975.

What condition is Rp US169S to MO9N 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 Rp US169S to MO9N over Mo 9 carry?

About 7,890 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Rp US169S to MO9N over Mo 9?

The structure is 189 ft (57.6 m) long with a longest span of 72 ft (22 m) and a deck 29 ft wide.

Who owns Rp US169S to MO9N over Mo 9?

It is owned by the State Highway Agency.