US Bridges

Mo 11 S over Lit Mussel Fk

FairPosted for load

Adair County, Missouri · S 29 T 61 N R 17 W · Structure no. 5755

Built
1933
92 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
173 ft
5 main spans
Daily traffic
323
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 11 S over Lit Mussel Fk is a steel stringer/multi-beam or girder carrying Mo 11 S over Lit Mussel Fk in Adair 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 323 vehicles a day, roughly 11% of them trucks, projected to reach 404 by 2044. The structure is 173 ft (52.7 m) long and 23 ft wide. If it were closed, the detour would be 34.2 mi (55 km).

Location

Open in Google Maps
CarriesMo 11 S
CrossesLit Mussel Fk
LocationS 29 T 61 N R 17 W
RouteState Highway 11
CountyAdair County
StateMissouri
Coordinates40.05509, -92.8318
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.8 US tons
Inventory rating17.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length173 ft (52.7 m)
Longest span41 ft (12.6 m)
Deck width23 ft (7.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic323 (2024)
Projected traffic404 by 2044
Trucks11%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.2 mi (55 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 11 S over Lit Mussel Fk built?

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

What condition is Mo 11 S over Lit Mussel Fk 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 2023.

How much traffic does Mo 11 S over Lit Mussel Fk carry?

About 323 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Mo 11 S over Lit Mussel Fk?

The structure is 173 ft (52.7 m) long with a longest span of 41 ft (12.6 m) and a deck 23 ft wide.

Who owns Mo 11 S over Lit Mussel Fk?

It is owned by the State Highway Agency.