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Infrastructure Grade
Infrastructure Report Card
7.5% of bridges in poor condition
Total Bridges
2,549
Poor Condition
192(7.5%)
Avg Bridge Age
58 yrs
Trend
Stable
| Metric | New Hampshire | National Avg | Trend |
|---|---|---|---|
| % Poor Condition | 7.5% | 6.7% | Stable |
| vs. National Average | +0.8 pts | -- | -- |
| Average Bridge Age | 58 yrs | 48 yrs | -- |
| Good or Better | 1,512(59.3%) | -- | -- |
Grade Scale
Percentage of bridges in poor condition over time. The dashed line shows the national average for comparison.
Total Bridges
2,549
Poor Condition
192(7.5%)
Average Age
58 yrs
Daily Crossings
17.4M
Good or Better
1,512(59.3%)
These bridges have at least one major component rated "5" (Fair) — one step above the poor threshold. Sorted by daily traffic to highlight highest-impact structures at risk.
| Bridge | Location | Deck | Super | Sub | Daily Traffic |
|---|---|---|---|---|---|
| I-95 | Rockingham County | 5 | 5 | 7 | 86,429 |
| I-93 FEE TPK | Merrimack County | 5 | 5 | 6 | 82,029 |
| I-93 FEE TPK | Merrimack County | 5 | 5 | 7 | 79,640 |
| I-93 FEE TPK | Merrimack County | 5 | 5 | 5 | 78,501 |
| FEE TPK NB | Hillsborough County | 6 | 5 | 5 | 48,402 |
| I-93 SB | Hillsborough County | 6 | 5 | 7 | 48,294 |
| I-93 SB NH101 WB | Hillsborough County | 5 | 7 | 7 | 47,490 |
| I-93 SB NH101 WB | Hillsborough County | 5 | 7 | 7 | 47,490 |
| I-93 NB NH101 EB | Hillsborough County | 5 | 7 | 6 | 47,490 |
| US202 | Merrimack County | 5 | 7 | 6 | 45,555 |
| I-93 FEE TPK NB | Merrimack County | 7 | 7 | 5 | 43,056 |
| I-93 FEE TPK SB | Merrimack County | 7 | 7 | 5 | 38,086 |
| I-93 FEE TPK NB | Merrimack County | 6 | 6 | 5 | 37,766 |
| I-93 FEE TPK SB | Merrimack County | 6 | 6 | 5 | 37,288 |
| I-93 NB | Hillsborough County | 5 | 7 | 5 | 36,942 |
The 10 bridges in poorest condition, ranked by lowest sufficiency rating.
over NECRR
over NHRR(ABD)
over NEEDLE SHOP BROOK
over CONNECTICUT RIVER
over ARCHERTOWN BROOK
over BRANCH RIVER
over SOUTH RIVER
over MAD RIVER
over SUGAR RIVER
over FRAZIER BROOK
States with similar infrastructure profiles, ranked by percentage of bridges in poor condition.
Grading: Grades are based on the percentage of bridges classified as "poor condition." A bridge is in poor condition when at least one major component (deck, superstructure, or substructure) is rated 4 or below on the NBI 0-9 scale.
Data Source: Federal Highway Administration (FHWA) National Bridge Inventory (NBI). Data is updated annually. BridgeStats is not affiliated with or endorsed by the FHWA.
Watchlist Criteria: Bridges with any component rated "5" (Fair) are one step from the poor threshold of 4 and are flagged for monitoring. These bridges are not yet in poor condition but may deteriorate without maintenance.