Harford County Bridge Report Card
Harford County scores 89 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Harford County, Maryland
Harford County has 256 bridges in the National Bridge Inventory, with 11 rated poor and 0 rated scour-critical. Its poor-condition share of 4.3% is at or below the 4.6% statewide average. Poor-condition bridges carry about 44,983 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Harford County a Bridge Condition Exposure Score of 89/100 (B). The county has 256 bridges in the National Bridge Inventory, including 11 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 44,983 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 4.3% | 8.6 |
| Poor-condition traffic exposure | 25 | 1.9% of measured traffic | 1.4 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 51 years vs 48 nationally | 1.3 |
| Traffic-data completeness | 5 | 2,426,223 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 4.3% |
| State Poor-Condition Share | 4.6% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 51 years |
| Poor-Condition Traffic Exposure | 44,983 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Harford County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| US 1 over N Tollgate RD Ped Trail | Poor condition + traffic exposure | Poor | 20,542 | 1963 |
| Abingdon Road over Csx Railroad | Poor condition + traffic exposure | Poor | 10,242 | 1940 |
| Jarrettsville Road over East Branch /winters Run | Poor condition + traffic exposure | Poor | 4,308 | 1950 |
| Hookers Mill Road over Bynum Run | Poor condition + traffic exposure | Poor | 3,986 | 1957 |
| Md 136 over Falling Branch | Poor condition + traffic exposure | Poor | 2,161 | 1931 |
| Grier Nursery Road over Deer Creek | Poor condition + traffic exposure | Poor | 1,660 | 1955 |
| Glenville Road over Mill Brook | Poor condition + traffic exposure | Poor | 816 | 1930 |
| Trappe Church Road over Hollands Branch | Poor condition + traffic exposure | Poor | 591 | 1952 |
| Stafford Road over Buck Branch | Poor condition + traffic exposure | Poor | 508 | 1980 |
| Amoss Mill Road over Island Branch | Poor condition + traffic exposure | Poor | 99 | 1972 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.