Checked
Maryland Bridge Conditions
Highway bridges longer than 20 feet in the 2025 National Bridge Inventory
Yearly inspection ratings. A poor rating does not mean a bridge is unsafe to use.
- Highway bridges
- 5,500
- Good condition
- 31.9%
- 1,753
- Poor condition
- 4.4%
- 240
- Weight-limited or closed
- 418
Bridges by county
| County | Bridges | Good | Poor | Weight-limited | Avg. year built |
|---|---|---|---|---|---|
| Allegany County | 244 | 36.9% | 5.3% (13) | 10 | 1971 |
| Anne Arundel County | 392 | 31.6% | 1% (4) | 10 | 1980 |
| Baltimore city | 374 | 15.8% | 9.1% (34) | 8 | 1964 |
| Baltimore County | 786 | 30% | 2.8% (22) | 52 | 1971 |
| Calvert County | 34 | 47.1% | 0% (0) | 0 | 1985 |
| Caroline County | 70 | 27.1% | 10% (7) | 10 | 1973 |
| Carroll County | 205 | 27.8% | 4.9% (10) | 13 | 1968 |
| Cecil County | 193 | 32.1% | 3.1% (6) | 13 | 1972 |
| Charles County | 94 | 44.7% | 8.5% (8) | 7 | 1974 |
| Dorchester County | 47 | 14.9% | 10.6% (5) | 4 | 1980 |
| Frederick County | 485 | 40.4% | 2.9% (14) | 31 | 1972 |
| Garrett County | 140 | 20% | 11.4% (16) | 27 | 1970 |
| Harford County | 276 | 38.8% | 4.3% (12) | 33 | 1973 |
| Howard County | 312 | 33% | 5.1% (16) | 5 | 1979 |
| Kent County | 44 | 11.4% | 4.5% (2) | 3 | 1957 |
| Montgomery County | 522 | 39.3% | 4.8% (25) | 37 | 1978 |
| Prince George's County | 576 | 37% | 3.1% (18) | 58 | 1977 |
| Queen Anne's County | 88 | 21.6% | 2.3% (2) | 2 | 1971 |
| Somerset County | 46 | 19.6% | 6.5% (3) | 10 | 1975 |
| St. Mary's County | 50 | 26% | 4% (2) | 3 | 1968 |
| Talbot County | 42 | 19% | 2.4% (1) | 2 | 1967 |
| Washington County | 300 | 28.3% | 4.3% (13) | 35 | 1956 |
| Wicomico County | 98 | 26.5% | 5.1% (5) | 7 | 1976 |
| Worcester County | 82 | 29.3% | 2.4% (2) | 13 | 1978 |
Frequently asked questions
- How many bridges in Maryland are in poor condition?
- In the 2025 National Bridge Inventory, 240 of 5,500 highway bridges in Maryland were rated poor (4.4% of rated bridges).
- Which Maryland counties have the most bridges in poor condition?
- Among counties with at least 30 bridges, the highest shares rated poor are Garrett County (11.4%), Dorchester County (10.6%), Caroline County (10%), Baltimore city (9.1%), Charles County (8.5%).
Source: Federal Highway Administration, National Bridge Inventory · 2025 data