US Bridges

Mo 43 S over N Fk Spring Rvr

Poor

Jasper County, Missouri · S 1 T 29 N R 33 W · Structure no. 2339

Built
1971
54 years old, rebuilt 1990
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
596 ft
3 main spans
Daily traffic
3,099
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 43 S over N Fk Spring Rvr is a steel continuous stringer/multi-beam or girder carrying Mo 43 S over N Fk Spring Rvr in Jasper County, Missouri. It was built in 1971 and reconstructed in 1990, so it is 54 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 3,099 vehicles a day, roughly 5% of them trucks, projected to reach 4,649 by 2044. The structure is 596 ft (181.7 m) long and 41 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesMo 43 S
CrossesN Fk Spring Rvr
LocationS 1 T 29 N R 33 W
RouteState Highway 43
Coordinates37.28426, -94.48807
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.7 US tons
Inventory rating23.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+6 approach)
Design loadH 20
Structure length596 ft (181.7 m)
Longest span100 ft (30.5 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,099 (2024)
Projected traffic4,649 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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$5.9 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 43 S over N Fk Spring Rvr built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1990.

What condition is Mo 43 S over N Fk Spring Rvr in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Mo 43 S over N Fk Spring Rvr carry?

About 3,099 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Mo 43 S over N Fk Spring Rvr?

The structure is 596 ft (181.7 m) long with a longest span of 100 ft (30.5 m) and a deck 41 ft wide.

Who owns Mo 43 S over N Fk Spring Rvr?

It is owned by the State Highway Agency.