US Bridges

Mo 156 E over Cottonwood CR

FairPosted for load

Macon County, Missouri · S 11 T 60 N R 16 W · Structure no. 8936

Built
1933
92 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
64 ft
3 main spans
Daily traffic
273
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 156 E over Cottonwood CR is a steel stringer/multi-beam or girder carrying Mo 156 E over Cottonwood CR in Macon County, Missouri. It was built in 1933, so it is 92 years old, older 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. Its operating status is: posted for load restriction.

It carries about 273 vehicles a day, roughly 18% of them trucks, projected to reach 341 by 2044. The structure is 64 ft (19.5 m) long and 21 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

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CarriesMo 156 E
CrossesCottonwood CR
LocationS 11 T 60 N R 16 W
RouteState Highway 156
CountyMacon County
StateMissouri
Coordinates40.02121, -92.64928
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating21.8 US tons
Inventory rating10.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length64 ft (19.5 m)
Longest span30 ft (9.1 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic273 (2024)
Projected traffic341 by 2044
Trucks18%
Lanes on structure1
Traffic directionOne-lane bridge for two-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$694,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 156 E over Cottonwood CR built?

It was built in 1933, making it 92 years old in 2025.

What condition is Mo 156 E over Cottonwood CR 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 September 2023.

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

About 273 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is Mo 156 E over Cottonwood CR?

The structure is 64 ft (19.5 m) long with a longest span of 30 ft (9.1 m) and a deck 21 ft wide.

Who owns Mo 156 E over Cottonwood CR?

It is owned by the State Highway Agency.