Clipper Mill Road over Prettyboy Reservoir
Baltimore County, Maryland · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Clipper Mill Road over Prettyboy Reservoir in Baltimore County, Maryland, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1931 and reconstructed in 1988, making it 94 years old at the 2025 inventory.
- It carries about 311 vehicles a day (traffic count year 2024).
- Its listed owner is a city or municipal highway agency.
- It is one of 22 of the 786 inventoried bridges in Baltimore County rated poor (2.8%); 22 (2.8%) are rated poor.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (39.68006, -76.77058)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Steel girder and floorbeam |
| Length | about 375 ft |
| Location | 0.3 Mi E Gunpowder Rd |
| NBI structure number | 200000BC6519010 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maryland department of transportation.
Busiest bridges in Baltimore County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 83/IS 695 over Thornton Road | 1954 | 222,500 | Fair |
| Is 695 over Md 26 | 2012 | 210,600 | Good |
| Is 695 & Belmont A over Dead Run | 1961 | 206,852 | Fair |
| Is 695 over Mta Light Rail | 1955 | 205,485 | Fair |
| Is 695 over Security Boulevard | 1961 | 203,902 | Good |
| Is 695 over Dogwood Road | 1961 | 203,902 | Fair |
All bridges nearby: Baltimore County, MD bridge conditions · every bridge in Baltimore County · Maryland bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.