US Bridges

Is 70 W over Sni-A-Bar CR

Fair

Lafayette County, Missouri · S 32 T 49 N R 28 W · Structure no. 138

Built
1963
62 years old, rebuilt 1994
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
223 ft
4 main spans
Daily traffic
19,225
2024 count
Owner
State
State Highway Agency

About this bridge

Is 70 W over Sni-A-Bar CR is a steel continuous stringer/multi-beam or girder carrying Is 70 W over Sni-A-Bar CR in Lafayette County, Missouri. It was built in 1963 and reconstructed in 1994, so it is 62 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.

It carries about 19,225 vehicles a day, roughly 35% of them trucks, projected to reach 35,566 by 2044. The structure is 223 ft (68 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 70 W
CrossesSni-A-Bar CR
LocationS 32 T 49 N R 28 W
RouteInterstate 70
Coordinates39.01049, -94.03035
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating32.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length223 ft (68 m)
Longest span60 ft (18.3 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,225 (2024)
Projected traffic35,566 by 2044
Trucks35%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Is 70 W over Sni-A-Bar CR built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1994.

What condition is Is 70 W 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 Is 70 W over Sni-A-Bar CR carry?

About 19,225 vehicles per day (2024 count), of which roughly 35% are trucks.

How long is Is 70 W over Sni-A-Bar CR?

The structure is 223 ft (68 m) long with a longest span of 60 ft (18.3 m) and a deck 41 ft wide.

Who owns Is 70 W over Sni-A-Bar CR?

It is owned by the State Highway Agency.