Columbia Road over Plumtree Branch
Howard County, Maryland · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Columbia Road over Plumtree Branch in Howard County, Maryland, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 1987, making it 38 years old at the 2025 inventory.
- It carries about 8,641 vehicles a day (traffic count year 1999).
- Its listed owner is the county highway agency.
- 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 → (39.24997, -76.83462)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 4 | Poor condition |
Bridge details
| Structure | Steel culvert |
| Length | about 49 ft |
| Location | 0.8 Mi. North of Md. 108 |
| NBI structure number | 200000HO0147030 |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maryland department of transportation.
All bridges nearby: Howard County, MD bridge conditions · Maryland bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.