US Bridges

Rt N N over Chariton Rvr

Fair

Adair County, Missouri · S 15 T 61 N R 16 W · Structure no. 3379

Built
1983
42 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
337 ft
5 main spans
Daily traffic
388
2024 count
Owner
State
State Highway Agency

About this bridge

Rt N N over Chariton Rvr is a prestressed concrete continuous stringer/multi-beam or girder carrying Rt N N over Chariton Rvr in Adair County, Missouri. It was built in 1983, so it is 42 years old, younger 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 388 vehicles a day, roughly 11% of them trucks, projected to reach 485 by 2044. The structure is 337 ft (102.7 m) long and 30 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesRt N N
CrossesChariton Rvr
LocationS 15 T 61 N R 16 W
RouteState Highway 0N
CountyAdair County
StateMissouri
Coordinates40.0942, -92.68497
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment6: Equal to present minimum criteria
Operating rating91.3 US tons
Inventory rating19.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length337 ft (102.7 m)
Longest span100 ft (30.5 m)
Deck width30 ft (9 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic388 (2024)
Projected traffic485 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt N N over Chariton Rvr built?

It was built in 1983, making it 42 years old in 2025.

What condition is Rt N N over Chariton Rvr 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 January 2024.

How much traffic does Rt N N over Chariton Rvr carry?

About 388 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Rt N N over Chariton Rvr?

The structure is 337 ft (102.7 m) long with a longest span of 100 ft (30.5 m) and a deck 30 ft wide.

Who owns Rt N N over Chariton Rvr?

It is owned by the State Highway Agency.