US Bridges

Mo 6 E over Spring CR

Good

Adair County, Missouri · S 29 T 63 N R 16 W · Structure no. 3879

Built
1991
34 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
213 ft
4 main spans
Daily traffic
2,819
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 6 E over Spring CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 6 E over Spring CR in Adair County, Missouri. It was built in 1991, so it is 34 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,819 vehicles a day, roughly 13% of them trucks, projected to reach 4,933 by 2044. The structure is 213 ft (64.9 m) long and 46 ft wide. If it were closed, the detour would be 28 mi (45 km).

CarriesMo 6 E
CrossesSpring CR
LocationS 29 T 63 N R 16 W
RouteState Highway 6
Coordinates40.22779, -92.71563
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.4 US tons
Inventory rating46.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length213 ft (64.9 m)
Longest span70 ft (21.3 m)
Deck width46 ft (13.9 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,819 (2024)
Projected traffic4,933 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 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 Spring CR built?

It was built in 1991, making it 34 years old in 2025.

What condition is Mo 6 E over Spring CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does Mo 6 E over Spring CR carry?

About 2,819 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is Mo 6 E over Spring CR?

The structure is 213 ft (64.9 m) long with a longest span of 70 ft (21.3 m) and a deck 46 ft wide.

Who owns Mo 6 E over Spring CR?

It is owned by the State Highway Agency.