Mo 185 S over Millers Swan Br
PoorWashington County, Missouri · S 29 T 38 N R 2 E · Structure no. 547
- Built
- 1961
- 64 years old
- Condition
- Poor
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 172 ft
- 3 main spans
- Daily traffic
- 706
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 185 S over Millers Swan Br is a steel continuous stringer/multi-beam or girder carrying Mo 185 S over Millers Swan Br in Washington County, Missouri. It was built in 1961, so it is 64 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 4 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.
It carries about 706 vehicles a day, roughly 12% of them trucks, projected to reach 988 by 2044. The structure is 172 ft (52.4 m) long and 30 ft wide. If it were closed, the detour would be 44.7 mi (72 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 185 S over Millers Swan Br built?
It was built in 1961, making it 64 years old in 2025.
What condition is Mo 185 S over Millers Swan Br 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 June 2024.
How much traffic does Mo 185 S over Millers Swan Br carry?
About 706 vehicles per day (2024 count), of which roughly 12% are trucks.
How long is Mo 185 S over Millers Swan Br?
The structure is 172 ft (52.4 m) long with a longest span of 65 ft (19.8 m) and a deck 30 ft wide.
Who owns Mo 185 S over Millers Swan Br?
It is owned by the State Highway Agency.