US Bridges

Corn RD over Br of Sni-A-Bar CR

Fair

Jackson County, Missouri · S 35 T 48 N R 30 W · Structure no. 20680

Built
1950
75 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
30 ft
1 main span
Daily traffic
87
2024 count
Owner
County
County Highway Agency

About this bridge

Corn RD over Br of Sni-A-Bar CR is a concrete culvert carrying Corn RD over Br of Sni-A-Bar CR in Jackson 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 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 87 vehicles a day, roughly 2% of them trucks, projected to reach 131 by 2044. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCorn RD
CrossesBr of Sni-A-Bar CR
LocationS 35 T 48 N R 30 W
RouteCounty Highway 270
CountyJackson County
StateMissouri
Coordinates38.92591, -94.19302
Functional classRural Minor 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadOther
Structure length30 ft (9.1 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic87 (2024)
Projected traffic131 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Corn RD over Br of Sni-A-Bar CR built?

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

What condition is Corn RD over Br of 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 March 2023.

How much traffic does Corn RD over Br of Sni-A-Bar CR carry?

About 87 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Corn RD over Br of Sni-A-Bar CR?

The structure is 30 ft (9.1 m) long with a longest span of 12 ft (3.7 m).

Who owns Corn RD over Br of Sni-A-Bar CR?

It is owned by the County Highway Agency.