US Bridges

Oneal RD over Trib of Slacks Br

Good

Boone County, Missouri · S 15 T 49 N R 13 W · Structure no. 16423

Built
1980
45 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
300
2023 count
Owner
County
County Highway Agency

About this bridge

Oneal RD over Trib of Slacks Br is a prestressed concrete tee beam carrying Oneal RD over Trib of Slacks Br in Boone County, Missouri. It was built in 1980, so it is 45 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 300 vehicles a day, roughly 5% of them trucks, projected to reach 570 by 2043. The structure is 36 ft (11 m) long and 23 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesOneal RD
CrossesTrib of Slacks Br
LocationS 15 T 49 N R 13 W
RouteCounty Highway 119
Coordinates39.02755, -92.3728
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.5 US tons
Inventory rating33.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic570 by 2043
Trucks5%
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 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 Oneal RD over Trib of Slacks Br built?

It was built in 1980, making it 45 years old in 2025.

What condition is Oneal RD over Trib of Slacks Br in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does Oneal RD over Trib of Slacks Br carry?

About 300 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Oneal RD over Trib of Slacks Br?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 23 ft wide.

Who owns Oneal RD over Trib of Slacks Br?

It is owned by the County Highway Agency.