US Bridges

County RD 9720 over Trib W Fk Spring R

Fair

Howell County, Missouri · S 25 T 22 N R 9 W · Structure no. 21929

Built
1938
87 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 9720 over Trib W Fk Spring R is a concrete continuous slab carrying County RD 9720 over Trib W Fk Spring R 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.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 39 by 2043. The structure is 24 ft (7.3 m) long and 23 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCounty RD 9720
CrossesTrib W Fk Spring R
LocationS 25 T 22 N R 9 W
RouteCounty Highway 331
CountyHowell County
StateMissouri
Coordinates36.54743, -91.88602
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length24 ft (7.3 m)
Longest span12 ft (3.7 m)
Deck width23 ft (7.1 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic39 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 9720 over Trib W Fk Spring R built?

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

What condition is County RD 9720 over Trib W Fk Spring R 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 9720 over Trib W Fk Spring R carry?

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

How long is County RD 9720 over Trib W Fk Spring R?

The structure is 24 ft (7.3 m) long with a longest span of 12 ft (3.7 m) and a deck 23 ft wide.

Who owns County RD 9720 over Trib W Fk Spring R?

It is owned by the County Highway Agency.