US Bridges

County RD 6390 over S Fk of Spring Rvr

Fair

Howell County, Missouri · S 26 T 23 N R 9 W · Structure no. 22279

Built
1938
87 years old, rebuilt 1958
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
50 ft
4 main spans
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 6390 over S Fk of Spring Rvr is a concrete continuous slab carrying County RD 6390 over S Fk of Spring Rvr in Howell County, Missouri. It was built in 1938 and reconstructed in 1958, so it is 87 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 39 by 2043. The structure is 50 ft (15.2 m) long and 16 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty RD 6390
CrossesS Fk of Spring Rvr
LocationS 26 T 23 N R 9 W
RouteCounty Highway 348
CountyHowell County
StateMissouri
Coordinates36.6297, -91.9264
Functional classRural Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadOther
Structure length50 ft (15.2 m)
Longest span13 ft (4 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic39 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 6390 over S Fk of Spring Rvr built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1958.

What condition is County RD 6390 over S Fk of Spring Rvr 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 November 2024.

How much traffic does County RD 6390 over S Fk of Spring Rvr carry?

About 30 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 6390 over S Fk of Spring Rvr?

The structure is 50 ft (15.2 m) long with a longest span of 13 ft (4 m) and a deck 16 ft wide.

Who owns County RD 6390 over S Fk of Spring Rvr?

It is owned by the County Highway Agency.