Md 471 over St. Marys River
GoodSt. Mary's County, Maryland · 1.01 Miles North of Md 5 · Structure no. 100000180028020
- Built
- 1990
- 35 years old
- Condition
- Good
- inspected November 2024
- Type
- Culvert
- Concrete
- Length
- 63 ft
- Daily traffic
- 4,242
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Md 471 over St. Marys River is a concrete culvert carrying Md 471 over St. Marys River in St. Mary's County, Maryland. It was built in 1990, so it is 35 years old, younger than the Maryland average of 52.6 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 4,242 vehicles a day, roughly 8% of them trucks, projected to reach 4,856 by 2026. The structure is 63 ft (19.2 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Md 471 over St. Marys River built?
It was built in 1990, making it 35 years old in 2025.
What condition is Md 471 over St. Marys River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 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 63 ft (19.2 m) long with a longest span of 15 ft (4.6 m) and a deck 33 ft wide.
Who owns Md 471 over St. Marys River?
It is owned by the State Highway Agency.