US Bridges

Mo 6 E over N Fk Salt Rvr Ovrf

Fair

Adair County, Missouri · S 29 T 62 N R 13 W · Structure no. 3561

Built
1985
40 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
241 ft
8 main spans
Daily traffic
2,660
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 6 E over N Fk Salt Rvr Ovrf is a prestressed concrete continuous tee beam carrying Mo 6 E over N Fk Salt Rvr Ovrf in Adair County, Missouri. It was built in 1985, so it is 40 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 6 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 2,660 vehicles a day, roughly 27% of them trucks, projected to reach 4,655 by 2044. The structure is 241 ft (73.5 m) long and 41 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

Open in Google Maps
CarriesMo 6 E
CrossesN Fk Salt Rvr Ovrf
LocationS 29 T 62 N R 13 W
RouteState Highway 6
CountyAdair County
StateMissouri
Coordinates40.14427, -92.38342
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.6 US tons
Inventory rating28.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length241 ft (73.5 m)
Longest span30 ft (9.1 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,660 (2024)
Projected traffic4,655 by 2044
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed31.7 mi (51 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 6 E over N Fk Salt Rvr Ovrf built?

It was built in 1985, making it 40 years old in 2025.

What condition is Mo 6 E over N Fk Salt Rvr Ovrf 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 6 E over N Fk Salt Rvr Ovrf carry?

About 2,660 vehicles per day (2024 count), of which roughly 27% are trucks.

How long is Mo 6 E over N Fk Salt Rvr Ovrf?

The structure is 241 ft (73.5 m) long with a longest span of 30 ft (9.1 m) and a deck 41 ft wide.

Who owns Mo 6 E over N Fk Salt Rvr Ovrf?

It is owned by the State Highway Agency.