US Bridges

Mo 33 S over Oconnor Br

Fair

Clinton County, Missouri · S 29 T 57 N R 31 W · Structure no. 5733

Built
1933
92 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
20 ft
2 main spans
Daily traffic
717
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 33 S over Oconnor Br is a concrete continuous culvert carrying Mo 33 S over Oconnor Br in Clinton 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 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 717 vehicles a day, roughly 11% of them trucks, projected to reach 932 by 2044. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesMo 33 S
CrossesOconnor Br
LocationS 29 T 57 N R 31 W
RouteState Highway 33
CountyClinton County
StateMissouri
Coordinates39.72461, -94.40302
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.6 US tons
Inventory rating30.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length20 ft (6.1 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic717 (2024)
Projected traffic932 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 33 S over Oconnor Br built?

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

What condition is Mo 33 S over Oconnor 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 December 2024.

How much traffic does Mo 33 S over Oconnor Br carry?

About 717 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Mo 33 S over Oconnor Br?

The structure is 20 ft (6.1 m) long with a longest span of 8 ft (2.4 m).

Who owns Mo 33 S over Oconnor Br?

It is owned by the State Highway Agency.