Checked
Maine 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
- 2,542
- Good condition
- 25.1%
- 637
- Poor condition
- 15.4%
- 392
- Weight-limited or closed
- 150
Bridges by county
| County | Bridges | Good | Poor | Weight-limited | Avg. year built |
|---|---|---|---|---|---|
| Androscoggin County | 136 | 41.9% | 12.5% (17) | 4 | 1975 |
| Aroostook County | 231 | 18.2% | 11.7% (27) | 6 | 1971 |
| Cumberland County | 344 | 27% | 10.2% (35) | 13 | 1975 |
| Franklin County | 129 | 25.6% | 22.5% (29) | 10 | 1969 |
| Hancock County | 69 | 23.2% | 24.6% (17) | 5 | 1964 |
| Kennebec County | 190 | 20% | 12.6% (24) | 7 | 1966 |
| Knox County | 54 | 27.8% | 16.7% (9) | 1 | 1971 |
| Lincoln County | 63 | 23.8% | 11.1% (7) | 8 | 1972 |
| Oxford County | 253 | 24.1% | 17.8% (45) | 16 | 1968 |
| Penobscot County | 317 | 20.2% | 18.9% (60) | 15 | 1974 |
| Piscataquis County | 80 | 20% | 21.3% (17) | 9 | 1966 |
| Sagadahoc County | 64 | 28.1% | 9.4% (6) | 2 | 1977 |
| Somerset County | 173 | 20.8% | 23.1% (40) | 10 | 1968 |
| Waldo County | 92 | 16.3% | 16.3% (15) | 6 | 1964 |
| Washington County | 111 | 36.9% | 19.8% (22) | 5 | 1972 |
| York County | 236 | 32.6% | 9.3% (22) | 11 | 1976 |
Frequently asked questions
- How many bridges in Maine are in poor condition?
- In the 2025 National Bridge Inventory, 392 of 2,542 highway bridges in Maine were rated poor (15.4% of rated bridges).
- Which Maine counties have the most bridges in poor condition?
- Among counties with at least 30 bridges, the highest shares rated poor are Hancock County (24.6%), Somerset County (23.1%), Franklin County (22.5%), Piscataquis County (21.3%), Washington County (19.8%).
Source: Federal Highway Administration, National Bridge Inventory · 2025 data