Tamar Drive over Dorsey Run
Howard County, Maryland · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tamar Drive over Dorsey Run in Howard County, Maryland, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1989, making it 36 years old at the 2025 inventory.
- It carries about 11,824 vehicles a day (traffic count year 1999).
- Its listed owner is the county highway agency.
- It is one of 193 of the 312 inventoried bridges in Howard County rated fair (61.9%); 16 (5.1%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (39.20265, -76.80156)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Steel culvert |
| Length | about 34 ft |
| Location | 0.1 Mi W of Old Mongomer |
| NBI structure number | 200000HO0143030 |
| Condition class | Fair |
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.