US Bridges

Mo 156 E over Walnut CR

Good

Macon County, Missouri · S 18 T 60 N R 16 W · Structure no. 33449

Built
2011
14 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
150 ft
3 main spans
Daily traffic
123
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 156 E over Walnut CR is a prestressed concrete box beam or girders - multiple carrying Mo 156 E over Walnut CR in Macon County, Missouri. It was built in 2011, so it is 14 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 123 vehicles a day, roughly 13% of them trucks, projected to reach 154 by 2044. The structure is 150 ft (45.7 m) long and 26 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesMo 156 E
CrossesWalnut CR
LocationS 18 T 60 N R 16 W
RouteState Highway 156
Coordinates40.01805, -92.7201
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.4 US tons
Inventory rating42.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span60 ft (18.3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic123 (2024)
Projected traffic154 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 156 E over Walnut CR built?

It was built in 2011, making it 14 years old in 2025.

What condition is Mo 156 E over Walnut 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 September 2023.

How much traffic does Mo 156 E over Walnut CR carry?

About 123 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is Mo 156 E over Walnut CR?

The structure is 150 ft (45.7 m) long with a longest span of 60 ft (18.3 m) and a deck 26 ft wide.

Who owns Mo 156 E over Walnut CR?

It is owned by the State Highway Agency.