US Bridges

Federal RD over Br of Niangua Rvr

PoorPosted for load

Dallas County, Missouri · S 15 T 32 N R 19 W · Structure no. 22379

Built
1900
125 years old, rebuilt 1998
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
10
2023 count
Owner
County
County Highway Agency

About this bridge

Federal RD over Br of Niangua Rvr is a steel stringer/multi-beam or girder carrying Federal RD over Br of Niangua Rvr in Dallas County, Missouri. It was built in 1900 and reconstructed in 1998, so it is 125 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, roughly 10% of them trucks, projected to reach 14 by 2043. The structure is 30 ft (9.1 m) long and 12 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFederal RD
CrossesBr of Niangua Rvr
LocationS 15 T 32 N R 19 W
RouteCounty Highway 353
Coordinates37.49336, -93.00079
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating11.9 US tons
Inventory rating6.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width12 ft (3.6 m)
Roadway width11 ft (3.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2023)
Projected traffic14 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$289,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Federal RD over Br of Niangua Rvr built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1998.

What condition is Federal RD over Br of Niangua Rvr in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does Federal RD over Br of Niangua Rvr carry?

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

How long is Federal RD over Br of Niangua Rvr?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 12 ft wide.

Who owns Federal RD over Br of Niangua Rvr?

It is owned by the County Highway Agency.