US Bridges

Mo 123 S over Campbell Br

Fair

Polk County, Missouri · S 16 T 34 N R 24 W · Structure no. 4972

Built
1926
99 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
749
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 123 S over Campbell Br is a concrete continuous culvert carrying Mo 123 S over Campbell Br in Polk County, Missouri. It was built in 1926, so it is 99 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 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 749 vehicles a day, roughly 10% of them trucks, projected to reach 1,198 by 2044. The structure is 25 ft (7.6 m) long and 34 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

CarriesMo 123 S
CrossesCampbell Br
LocationS 16 T 34 N R 24 W
RouteState Highway 123
Coordinates37.68747, -93.57399
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to 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 rating75.4 US tons
Inventory rating44.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic749 (2024)
Projected traffic1,198 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 Mo 123 S over Campbell Br built?

It was built in 1926, making it 99 years old in 2025.

What condition is Mo 123 S over Campbell Br 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 November 2023.

How much traffic does Mo 123 S over Campbell Br carry?

About 749 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mo 123 S over Campbell Br?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 34 ft wide.

Who owns Mo 123 S over Campbell Br?

It is owned by the State Highway Agency.