Bridge conditions in Howard County, Maryland
312 inventoried bridges · 16 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Howard County tracks close to typical: 16 of its 312 inventoried bridges (5.1%) are rated poor, against a national rate of about 7%.
- 16 of the 312 bridges in Howard County, Maryland, are rated in poor condition (5.1%) in the 2025 National Bridge Inventory, as of .
- 103 bridges (33.0%) are rated good and 193 (61.9%) fair.
- The median Howard County bridge was built in 1977.
- The busiest poor-rated bridge is Tamar Drive over Unnamed Stream (built 1970), carrying about 10,941 vehicles a day.
Good 33.0% · Fair 61.9% · Poor 5.1% of 312 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Tamar Drive over Unnamed Stream | 1970 | 10,941 | Poor |
| Broken Land Parkwa over Trib to Little Patuxent | 1972 | 10,830 | Poor |
| Columbia Road over Plumtree Branch | 1987 | 8,641 | Poor |
| Browns Bridge Road over Patuxent River | 1953 | 5,772 | Poor |
| Ilchester Road over Bonnie Branch | 1945 | 2,588 | Poor |
| Seneca Drive over Beaver Run Branch | 1960 | 1,985 | Poor |
| Daisy Road over Little Cattail Creek | 1935 | 1,525 | Poor |
| Pfefferkorn Road over Middle Patuxent River | 1935 | 1,454 | Poor |
| Henryton Road over Trib to S Br Patapsco R | 1925 | 1,427 | Poor |
| Union Chapel Road over Cattail Creek | 1955 | 1,052 | Poor |
| Summer Hollow Ln over Trib to Little Patuxent | 1972 | 542 | Poor |
| Wesley Lane over Tributary to Deep Run | 1972 | 500 | Poor |
| Quarter Staff Road over Trib to Little Patuxent | 1972 | 325 | Poor |
| Belmont Woods Road over Rockburn Branch | 1950 | 100 | Poor |
| Old Montgomery Rd over Trib to Little Patuxent | 1935 | 54 | Poor |
| Tiber Alley over Tiber River | 1935 | 45 | Poor |
Busiest bridges in the 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 |
| Is 95 NB over Md 32 Wbr | 1970 | 187,920 | Fair |
| Is 95 NB over Md 32 Ebr | 1970 | 187,920 | Fair |
| Is 95 NB over Middle Patuxent River | 1970 | 186,750 | Fair |
| Is 95 SB over Middle Patuxent River | 1970 | 186,750 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Maryland: Maryland bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.