US Bridges

County RD 8390 over S Fk of Spring Rvr

FairPosted for load

Howell County, Missouri · S 4 T 22 N R 8 W · Structure no. 21995

Built
1938
87 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
56 ft
5 main spans
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 8390 over S Fk of Spring Rvr is a concrete continuous slab carrying County RD 8390 over S Fk of Spring Rvr in Howell County, Missouri. It was built in 1938, 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. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, roughly 10% of them trucks, projected to reach 65 by 2043. The structure is 56 ft (17.1 m) long and 18 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty RD 8390
CrossesS Fk of Spring Rvr
LocationS 4 T 22 N R 8 W
RouteCounty Highway 334
CountyHowell County
StateMissouri
Coordinates36.6008, -91.8553
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.8 US tons
Inventory rating13.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadOther
Structure length56 ft (17.1 m)
Longest span11 ft (3.4 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic65 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 8390 over S Fk of Spring Rvr built?

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

What condition is County RD 8390 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 8390 over S Fk of Spring Rvr carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 8390 over S Fk of Spring Rvr?

The structure is 56 ft (17.1 m) long with a longest span of 11 ft (3.4 m) and a deck 18 ft wide.

Who owns County RD 8390 over S Fk of Spring Rvr?

It is owned by the County Highway Agency.