Mo 64 E over Niangua Rvr
PoorPosted for loadDallas County, Missouri · S 25 T 35 N R 18 W · Structure no. 5520
- Built
- 1931
- 94 years old
- Condition
- Poor
- inspected May 2024
- Type
- Arch - Deck
- Concrete Continuous
- Length
- 467 ft
- 2 main spans
- Daily traffic
- 976
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 64 E over Niangua Rvr is a concrete continuous arch - deck carrying Mo 64 E over Niangua Rvr in Dallas County, Missouri. It was built in 1931, so it is 94 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 976 vehicles a day, roughly 12% of them trucks, projected to reach 1,415 by 2044. The structure is 467 ft (142.3 m) long and 26 ft wide. If it were closed, the detour would be 47.2 mi (76 km).
Location
Open in Google MapsCondition and inspection
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.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 64 E over Niangua Rvr built?
It was built in 1931, making it 94 years old in 2025.
What condition is Mo 64 E over 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 May 2024.
How much traffic does Mo 64 E over Niangua Rvr carry?
About 976 vehicles per day (2024 count), of which roughly 12% are trucks.
How long is Mo 64 E over Niangua Rvr?
The structure is 467 ft (142.3 m) long with a longest span of 105 ft (32 m) and a deck 26 ft wide.
Who owns Mo 64 E over Niangua Rvr?
It is owned by the State Highway Agency.