Marriottsville Roa over Little Patuxent River
Howard County, Maryland · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Marriottsville Roa over Little Patuxent River in Howard County, Maryland, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1967, making it 58 years old at the 2025 inventory.
- It carries about 2,616 vehicles a day (traffic count year 1994).
- Its listed owner is the county highway agency.
- It is one of 103 of the 312 inventoried bridges in Howard County rated good (33.0%); 16 (5.1%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (39.30725, -76.89854)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 20 ft |
| Location | 0.23 Mile North of Is 70 |
| NBI structure number | 200000HO0005020 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Maryland department of transportation.
Busiest bridges in Howard County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Is 95 NB over Md 103 | 1968 | 193,331 | Fair |
| Is 95 SB over Md 103 | 1968 | 193,331 | Fair |
| Is 95 & Ramps 2 & over Hammond Branch | 1968 | 192,401 | Fair |
| Is 95 NB over CSX Transportation | 1970 | 187,920 | Fair |
| Is 95 SB over CSX Transportation | 1970 | 187,920 | Fair |
| Is 95 NB over Guilford Road | 1970 | 187,920 | Fair |
All bridges nearby: Howard County, MD bridge conditions · every bridge in Howard County · Maryland bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.