Md 851 over South Br Patapsco River
FairHoward County, Maryland · On Carroll CO Line · Structure no. 100000130018010
- Built
- 1975
- 50 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 151 ft
- 2 main spans
- Daily traffic
- 1,301
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
Md 851 over South Br Patapsco River is a steel continuous stringer/multi-beam or girder carrying Md 851 over South Br Patapsco River in Howard County, Maryland. It was built in 1975, so it is 50 years old, younger 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 5 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 1,301 vehicles a day, roughly 8% of them trucks, projected to reach 1,915 by 2026. The structure is 151 ft (46 m) long and 37 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 Md 851 over South Br Patapsco River built?
It was built in 1975, making it 50 years old in 2025.
What condition is Md 851 over South Br Patapsco 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 September 2024.
How much traffic does Md 851 over South Br Patapsco River carry?
About 1,301 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is Md 851 over South Br Patapsco River?
The structure is 151 ft (46 m) long with a longest span of 74 ft (22.6 m) and a deck 37 ft wide.
Who owns Md 851 over South Br Patapsco River?
It is owned by the State Highway Agency.