Md 471 over ST Marys River
FairSt. Mary's County, Maryland · 0.36 Mile North of Md 5 · Structure no. 100000180029010
- Built
- 1932
- 93 years old
- Condition
- Fair
- inspected December 2024
- Type
- Tee Beam
- Concrete
- Length
- 49 ft
- 2 main spans
- Daily traffic
- 4,242
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Md 471 over ST Marys River is a concrete tee beam carrying Md 471 over ST Marys River in St. Mary's County, Maryland. It was built in 1932, so it is 93 years old, older than the Maryland average of 52.6 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 4,242 vehicles a day, roughly 8% of them trucks, projected to reach 4,856 by 2026. The structure is 49 ft (14.9 m) long and 31 ft wide. If it were closed, the detour would be 11.2 mi (18 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Md 471 over ST Marys River built?
It was built in 1932, making it 93 years old in 2025.
What condition is Md 471 over ST Marys River 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 December 2024.
How much traffic does Md 471 over ST Marys River carry?
About 4,242 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is Md 471 over ST Marys River?
The structure is 49 ft (14.9 m) long with a longest span of 22 ft (6.7 m) and a deck 31 ft wide.
Who owns Md 471 over ST Marys River?
It is owned by the State Highway Agency.