US Bridges

County RD 4280 over Trib of Howell CR

Fair

Howell County, Missouri · S 12 T 24 N R 9 W · Structure no. 25004

Built
1975
50 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 4280 over Trib of Howell CR is a concrete continuous slab carrying County RD 4280 over Trib of Howell CR in Howell County, Missouri. It was built in 1975, so it is 50 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 6 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 23 ft (7 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty RD 4280
CrossesTrib of Howell CR
LocationS 12 T 24 N R 9 W
RouteCounty Highway 597
CountyHowell County
StateMissouri
Coordinates36.7655, -91.9107
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than 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 spans2
Design loadOther
Structure length23 ft (7 m)
Longest span11 ft (3.4 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 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 closed3.1 mi (5 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$162,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 4280 over Trib of Howell CR built?

It was built in 1975, making it 50 years old in 2025.

What condition is County RD 4280 over Trib of Howell 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 November 2024.

How much traffic does County RD 4280 over Trib of Howell CR carry?

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

How long is County RD 4280 over Trib of Howell CR?

The structure is 23 ft (7 m) long with a longest span of 11 ft (3.4 m) and a deck 16 ft wide.

Who owns County RD 4280 over Trib of Howell CR?

It is owned by the County Highway Agency.