Bridge conditions in Harford County, Maryland
276 inventoried bridges · 12 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 276 bridges in Harford County: 107 rated good, 157 fair, and 12 poor.
- 12 of the 276 bridges in Harford County, Maryland, are rated in poor condition (4.3%) in the 2025 National Bridge Inventory, as of .
- 107 bridges (38.8%) are rated good and 157 (56.9%) fair.
- The median Harford County bridge was built in 1975.
- The busiest poor-rated bridge is US 1 over Winters Run (built 1963), carrying about 21,112 vehicles a day.
Good 38.8% · Fair 56.9% · Poor 4.3% of 276 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 |
|---|---|---|---|
| US 1 over Winters Run | 1963 | 21,112 | Poor |
| US 1 over N Tollgate Rd Ped Trail | 1963 | 20,542 | Poor |
| Abingdon Road over CSX Railroad | 1940 | 10,242 | Poor |
| Jarrettsville Road over East Branch /winters Run | 1950 | 4,308 | Poor |
| Hookers Mill Road over Bynum Run | 1957 | 3,986 | Poor |
| Md 136 over Falling Branch | 1931 | 2,161 | Poor |
| Grier Nursery Road over Deer Creek | 1955 | 1,660 | Poor |
| Glenville Road over Mill Brook | 1930 | 816 | Poor |
| Trappe Church Road over Hollands Branch | 1952 | 591 | Poor |
| Stafford Road over Buck Branch | 1980 | 508 | Poor |
| Amoss Mill Road over Island Branch | 1972 | 99 | Poor |
| Nobles Mill Road over Deer Creek | 1883 | 70 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-95 over Winters Run Rd Winters R | 1963 | 161,591 | Fair |
| I-95 over James Run | 1963 | 130,492 | Fair |
| I-95 over Grays Run | 1963 | 116,162 | Good |
| I-95 over Carsins Run | 1963 | 100,386 | Good |
| I-95 over Swan Creek | 1963 | 100,386 | Fair |
| I-95 over Md 462 | 1963 | 95,675 | Fair |
| I-95 over Susquehanna River Pa RR | 1963 | 86,430 | Fair |
| Md 24 SB over I-95 | 1963 | 73,058 | Fair |
| Md 24 NB over I-95 | 1987 | 73,058 | Fair |
| Md 24 over Md 924 | 2011 | 72,060 | Good |
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.