Bridge Condition Trends in New Hampshire
Between 2015 and 2025, bridge conditions in New Hampshire have improved. The share of bridges rated poor went from 10.2% to 7.5% — a change of -2.6 percentage points.
Condition Summary
| Year | Total | Good | Fair | Poor | Poor % |
|---|---|---|---|---|---|
| 2015 | 2,470 | 1,323 | 896 | 251 | 10.2% |
| 2020 | 2,514 | 1,328 | 971 | 215 | 8.6% |
| 2025 | 2,549 | 1,303 | 1,054 | 192 | 7.5% |
Most Improved Counties in New Hampshire
| County | Poor % (2015) | Poor % (2025) | Change |
|---|---|---|---|
| Sullivan | 11.3% | 5.7% | -5.6 pp |
| Belknap | 9.4% | 4.5% | -5.0 pp |
| Coos | 8.3% | 5.3% | -3.0 pp |
| Carroll | 8.1% | 5.2% | -2.9 pp |
| Rockingham | 9.2% | 7.1% | -2.1 pp |
| Merrimack | 10.3% | 8.3% | -2.0 pp |
| Hillsborough | 9.1% | 8.1% | -1.1 pp |