US Bridges

Rt H E over Black Oak CR

Fair

Dent County, Missouri · S 10 T 34 N R 8 W · Structure no. 7878

Built
1955
70 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
34 ft
3 main spans
Daily traffic
408
2024 count
Owner
State
State Highway Agency

About this bridge

Rt H E over Black Oak CR is a concrete continuous culvert carrying Rt H E over Black Oak CR in Dent County, Missouri. It was built in 1955, so it is 70 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 408 vehicles a day, roughly 5% of them trucks, projected to reach 571 by 2044. The structure is 34 ft (10.4 m) long and 28 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesRt H E
CrossesBlack Oak CR
LocationS 10 T 34 N R 8 W
RouteState Highway 0H
Coordinates37.66544, -91.79782
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating28.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 10
Structure length34 ft (10.4 m)
Longest span11 ft (3.4 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic408 (2024)
Projected traffic571 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Rt H E over Black Oak CR built?

It was built in 1955, making it 70 years old in 2025.

What condition is Rt H E over Black Oak 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 January 2024.

How much traffic does Rt H E over Black Oak CR carry?

About 408 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Rt H E over Black Oak CR?

The structure is 34 ft (10.4 m) long with a longest span of 11 ft (3.4 m) and a deck 28 ft wide.

Who owns Rt H E over Black Oak CR?

It is owned by the State Highway Agency.