Clipper Mill Road over Prettyboy Reservoir
PoorBaltimore County, Maryland · 0.3 MI E Gunpowder RD · Structure no. 200000BC6519010
- Built
- 1931
- 94 years old, rebuilt 1988
- Condition
- Poor
- inspected April 2024
- Type
- Girder and Floorbeam System
- Steel
- Length
- 376 ft
- 6 main spans
- Daily traffic
- 311
- 2024 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Clipper Mill Road over Prettyboy Reservoir is a steel girder and floorbeam system carrying Clipper Mill Road over Prettyboy Reservoir in Baltimore County, Maryland. It was built in 1931 and reconstructed in 1988, so it is 94 years old, older than the Maryland average of 52.6 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 311 vehicles a day, roughly 5% of them trucks, projected to reach 419 by 2044. The structure is 376 ft (114.6 m) long and 23 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 Clipper Mill Road over Prettyboy Reservoir built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1988.
What condition is Clipper Mill Road over Prettyboy Reservoir 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 April 2024.
How much traffic does Clipper Mill Road over Prettyboy Reservoir carry?
About 311 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is Clipper Mill Road over Prettyboy Reservoir?
The structure is 376 ft (114.6 m) long with a longest span of 62 ft (18.9 m) and a deck 23 ft wide.
Who owns Clipper Mill Road over Prettyboy Reservoir?
It is owned by the City or Municipal Highway Agency.