US Bridges

Is 70 W over Sni-A-Bar CR

FairPosted for load

Jackson County, Missouri · S 36 T 49 N R 30 W · Structure no. 140

Built
1963
62 years old, rebuilt 1994
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
529 ft
9 main spans
Daily traffic
28,534
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 Jackson 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. Its operating status is: posted for load restriction.

It carries about 28,534 vehicles a day, roughly 35% of them trucks, projected to reach 38,521 by 2044. The structure is 529 ft (161.2 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 70 W
CrossesSni-A-Bar CR
LocationS 36 T 49 N R 30 W
RouteInterstate 70
Coordinates39.02051, -94.18283
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.6 US tons
Inventory rating33.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length529 ft (161.2 m)
Longest span78 ft (23.8 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,534 (2024)
Projected traffic38,521 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 December 2024.

How much traffic does Is 70 W over Sni-A-Bar CR carry?

About 28,534 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 529 ft (161.2 m) long with a longest span of 78 ft (23.8 m) and a deck 40 ft wide.

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

It is owned by the State Highway Agency.