US Bridges

Mo 143 S over Clark CR

FairPosted for load

Wayne County, Missouri · S 17 T 29 N R 5 E · Structure no. 8370

Built
1965
60 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
155 ft
3 main spans
Daily traffic
590
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 143 S over Clark CR is a steel continuous stringer/multi-beam or girder carrying Mo 143 S over Clark CR in Wayne County, Missouri. It was built in 1965, 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 590 vehicles a day, roughly 6% of them trucks, projected to reach 856 by 2044. The structure is 155 ft (47.2 m) long and 28 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

Location

Open in Google Maps
CarriesMo 143 S
CrossesClark CR
LocationS 17 T 29 N R 5 E
RouteState Highway 143
CountyWayne County
StateMissouri
Coordinates37.19532, -90.53271
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating21.8 US tons
Inventory rating12.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length155 ft (47.2 m)
Longest span60 ft (18.3 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic590 (2024)
Projected traffic856 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.6 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 143 S over Clark CR built?

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

What condition is Mo 143 S over Clark CR 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 December 2023.

How much traffic does Mo 143 S over Clark CR carry?

About 590 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Mo 143 S over Clark CR?

The structure is 155 ft (47.2 m) long with a longest span of 60 ft (18.3 m) and a deck 28 ft wide.

Who owns Mo 143 S over Clark CR?

It is owned by the State Highway Agency.