Rockingham County Bridge Report Card
Rockingham County scores 81 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Rockingham County, New Hampshire
Rockingham County has 309 bridges in the National Bridge Inventory, with 22 rated poor and 5 rated scour-critical. Its poor-condition share of 7.1% is at or below the 7.5% statewide average. Poor-condition bridges carry about 86,649 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Rockingham County a Bridge Condition Exposure Score of 81/100 (B). The county has 309 bridges in the National Bridge Inventory, including 22 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 86,649 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 | 7.1% | 14.2 |
| Poor-condition traffic exposure | 25 | 2.1% of measured traffic | 1.6 |
| Scour-critical bridge share | 20 | 1.6% | 3.2 |
| Average age vs national baseline | 10 | 48 years vs 48 nationally | 0.3 |
| Traffic-data completeness | 5 | 4,065,692 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 | 7.1% |
| State Poor-Condition Share | 7.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 1.6% |
| Average Bridge Age | 48 years |
| Poor-Condition Traffic Exposure | 86,649 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Rockingham County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Nh 1a over Hampton River | Poor condition + traffic exposure | Poor | 9,402 | 1949 |
| Dudley Road over Lamprey River | Poor condition + traffic exposure | Poor | 547 | 1914 |
| Nh 33 over Winnicut River | Poor condition + traffic exposure | Poor | 17,736 | 1959 |
| US 1 over Csx | Poor condition + traffic exposure | Poor | 15,436 | 1935 |
| US 1 over Csx(abd) | Poor condition + traffic exposure | Poor | 14,314 | 1936 |
| Maplewood Avenue over North Mill Pond | Poor condition + traffic exposure | Poor | 5,829 | 1940 |
| Bridge Street over Spicket River | Poor condition + traffic exposure | Poor | 4,883 | 1900 |
| Nh152 over North River | Poor condition + traffic exposure | Poor | 3,719 | 1925 |
| Nh 1b over Little Harbor | Poor condition + traffic exposure | Poor | 3,359 | 1942 |
| Nh111a over Exeter River | Poor condition + traffic exposure | Poor | 3,259 | 1978 |
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.