US Bridges

Rt Dd E over Niangua Rvr

Fair

Dallas County, Missouri · S 7 T 34 N R 19 W · Structure no. 6822

Built
1957
68 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
468
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Dd E over Niangua Rvr is a concrete continuous culvert carrying Rt Dd E over Niangua Rvr in Dallas County, Missouri. It was built in 1957, so it is 68 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 468 vehicles a day, roughly 9% of them trucks, projected to reach 679 by 2044. The structure is 38 ft (11.5 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesRt Dd E
CrossesNiangua Rvr
LocationS 7 T 34 N R 19 W
RouteState Highway 0DD
CountyDallas County
StateMissouri
Coordinates37.68229, -93.05268
Functional classRural Minor 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating23.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 10
Structure length38 ft (11.5 m)
Longest span12 ft (3.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic468 (2024)
Projected traffic679 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Dd E over Niangua Rvr built?

It was built in 1957, making it 68 years old in 2025.

What condition is Rt Dd E over Niangua 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 2023.

How much traffic does Rt Dd E over Niangua Rvr carry?

About 468 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Rt Dd E over Niangua Rvr?

The structure is 38 ft (11.5 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns Rt Dd E over Niangua Rvr?

It is owned by the State Highway Agency.