US Bridges

Mo 131 S over Sni-A-Bar CR

Fair

Lafayette County, Missouri · S 27 T 50 N R 28 W · Structure no. 672

Built
1964
61 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
285 ft
5 main spans
Daily traffic
2,140
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 131 S over Sni-A-Bar CR is a steel continuous stringer/multi-beam or girder carrying Mo 131 S over Sni-A-Bar CR in Lafayette County, Missouri. It was built in 1964, so it is 61 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 2,140 vehicles a day, roughly 7% of them trucks, projected to reach 3,103 by 2044. The structure is 285 ft (86.9 m) long and 30 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesMo 131 S
CrossesSni-A-Bar CR
LocationS 27 T 50 N R 28 W
RouteState Highway 131
CountyLafayette County
StateMissouri
Coordinates39.11068, -93.98324
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.7 US tons
Inventory rating19.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length285 ft (86.9 m)
Longest span80 ft (24.4 m)
Deck width30 ft (9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,140 (2024)
Projected traffic3,103 by 2044
Trucks7%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 131 S over Sni-A-Bar CR built?

It was built in 1964, making it 61 years old in 2025.

What condition is Mo 131 S over Sni-A-Bar 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 January 2025.

How much traffic does Mo 131 S over Sni-A-Bar CR carry?

About 2,140 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Mo 131 S over Sni-A-Bar CR?

The structure is 285 ft (86.9 m) long with a longest span of 80 ft (24.4 m) and a deck 30 ft wide.

Who owns Mo 131 S over Sni-A-Bar CR?

It is owned by the State Highway Agency.