US Bridges

Moonvalley RD over Niangua Rvr

Fair

Dallas County, Missouri · S 2 T 34 N R 18 W · Structure no. 30188

Built
2002
23 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
45 ft
4 main spans
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

Moonvalley RD over Niangua Rvr is a concrete continuous slab carrying Moonvalley RD over Niangua Rvr in Dallas County, Missouri. It was built in 2002, so it is 23 years old, younger 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 140 by 2043. The structure is 45 ft (13.7 m) long and 24 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesMoonvalley RD
CrossesNiangua Rvr
LocationS 2 T 34 N R 18 W
RouteCounty Highway 147
CountyDallas County
StateMissouri
Coordinates37.70204, -92.88157
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 protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.8 US tons
Inventory rating16.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span10 ft (3.1 m)
Deck width24 ft (7.2 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic140 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 Moonvalley RD over Niangua Rvr built?

It was built in 2002, making it 23 years old in 2025.

What condition is Moonvalley RD 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 March 2024.

How much traffic does Moonvalley RD over Niangua Rvr carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Moonvalley RD over Niangua Rvr?

The structure is 45 ft (13.7 m) long with a longest span of 10 ft (3.1 m) and a deck 24 ft wide.

Who owns Moonvalley RD over Niangua Rvr?

It is owned by the County Highway Agency.