US Bridges

Mo 81 S over Crooked CR

Fair

Lewis County, Missouri · S 8 T 62 N R 6 W · Structure no. 7463

Built
1950
75 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
377
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 81 S over Crooked CR is a concrete culvert carrying Mo 81 S over Crooked CR in Lewis County, Missouri. It was built in 1950, so it is 75 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 377 vehicles a day, roughly 5% of them trucks, projected to reach 547 by 2044. The structure is 24 ft (7.3 m) long and 28 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesMo 81 S
CrossesCrooked CR
LocationS 8 T 62 N R 6 W
RouteState Highway 81
Coordinates40.18852, -91.58329
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating78.4 US tons
Inventory rating46.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 10
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic377 (2024)
Projected traffic547 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 81 S over Crooked CR built?

It was built in 1950, making it 75 years old in 2025.

What condition is Mo 81 S over Crooked 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 October 2024.

How much traffic does Mo 81 S over Crooked CR carry?

About 377 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Mo 81 S over Crooked CR?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 28 ft wide.

Who owns Mo 81 S over Crooked CR?

It is owned by the State Highway Agency.