Total Bridges
2,542
Public highway bridges in New Hampshire
State profile · Near national median SD
New Hampshire bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in New Hampshire — drawn straight from the FHWA National Bridge Inventory.
- 2,542
- Public bridges
- 43.0%
- Good condition
- 7.1%
- Poor condition
- 7.1%
- Structurally deficient
Good Condition
43.0%
1,092 bridges rated 7-9
-7.0pp vs 50% benchmark
Poor Condition
7.1%
180 bridges rated 0-4
Structurally Deficient
7.1%
180 bridges flagged for repair priority
0.1pp vs national avg 7.0%
New Hampshire vs national bridge condition
New Hampshire — Good condition share 43.0%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
New Hampshire — Structurally deficient share 23.6%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
Bridge inventory deck-condition mix — New Hampshire (FHWA NBI)
New Hampshire vs nearby ranks
Adjacent states on the structurally deficient leaderboard (lower share = better)
States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below New Hampshire on the same metric.
36
New York
6.90% top marginal rate
21
Kentucky
7.06% top marginal rate
33
New Hampshire
7.08% top marginal rate
40
Oklahoma
7.50% top marginal rate
35
New Mexico
7.61% top marginal rate
Bridges Needing Most Attention in New Hampshire
Six lowest-condition bridges in New Hampshire, ranked by composite NBI rating. Each is inspected at least every 24 months.
OLD DEERFIELD ROAD
PoorOver: BROOK
185 FT FROM NH RTE 43, Rockingham, NH
Built 1920 Load: 1.8 t ADT: 190
TEMPLETON TURNPIKE
Structurally DeficientOver: PRIEST BROOK
1.9MI. RTE 119, Cheshire, NH
Built 1984 Load: 2.7 t ADT: 86
DUDLEY ROAD
Structurally DeficientOver: LAMPREY RIVER
.23 MI JCT 101, Rockingham, NH
Built 1914 Load: 2.9 t ADT: 535
SHOP ROAD
Structurally DeficientOver: NEEDLE SHOP BROOK
0.8 MI N NEW CHESTER RD, Merrimack, NH
Built 1930 Load: 3.3 t ADT: 63
WHITCOMB MILLS RD
PoorOver: WHITE BROOK
0.06 MI FR ARCH ST, Cheshire, NH
Built 1940 Load: 3.6 t ADT: 814
LEIGHTON MEADOW RD
Structurally DeficientOver: PHILLIPS BROOK
100 FT FR SULLIVAN RD 61, Coos, NH
Built 1940 Load: 3.6 t ADT: 90
All Bridges in New Hampshire
NH101 WB
UnknownOver: PINE ROAD
.2 MI EAST EXETER TL., Rockingham, NH
Built 1997 ADT: 2,700
CHESTER TURNPIKE
UnknownOver: NH101
0.4 MI AUBURN TL, Rockingham, NH
Built 1984 ADT: 46,000
NH101 RAMP A-B
UnknownOver: NH101
1.9MI E OF AUBURN TL, Rockingham, NH
Built 1981 ADT: 40,767
PATTEN HILL ROAD
UnknownOver: NH101
1.7 MI FROM RAYMOND TL, Rockingham, NH
Built 1981 ADT: 40,767
DEPOT ROAD
UnknownOver: NH101
.5 MI E CANDIA RAYMOND TL, Rockingham, NH
Built 1981 ADT: 39,124
I-93 SB
UnknownOver: KENDALL POND ROAD
.2 MI S. LONDONDERRY TL, Rockingham, NH
Built 1962 ADT: 6,400
I-93 NB
UnknownOver: KENDALL POND ROAD
.2 MI S OF LONDONDERRY TL, Rockingham, NH
Built 1962 ADT: 6,400
I-93 SB
UnknownOver: FORDWAY EXTENSION
0.8 MI S. LONDONDERRY T L, Rockingham, NH
Built 1962 ADT: 1,000
I-93 NB
UnknownOver: FORDWAY EXTENSION
0.8 MI SO. LONDONDERRY TL, Rockingham, NH
Built 1962 ADT: 1,000
BEEDE ROAD
UnknownOver: NH101
Junction Beede Rd &NH101, Rockingham, NH
Built 1998 ADT: 44,000
MARTIN ROAD
UnknownOver: NH101
1.1 MI WEST JCT NH101/125, Rockingham, NH
Built 1995 ADT: 24,000
NH101 EB
UnknownOver: NH125
.4 MI N BRENTWOOD TL, Rockingham, NH
Built 1997 ADT: 21,000
NH101 WB
UnknownOver: NH125
.41 MI N BRENTWOOD TL, Rockingham, NH
Built 1996 ADT: 27,000
NH101 EB
UnknownOver: CONNOR FARM ROAD
0.6MI W NH 27 OVERPASS, Rockingham, NH
Built 2000 ADT: 35
NH101 WB
UnknownOver: CONNOR FARM ROAD
0.6MI W NH 27 OVERPASS, Rockingham, NH
Built 2000 ADT: 35
NH 27
UnknownOver: NH101
JCT NH 27/NH101, Rockingham, NH
Built 1999 ADT: 21,500
NH 85
UnknownOver: NH101
1.5 MI NEWFIELDS TL, Rockingham, NH
Built 1994 ADT: 48,000
GUINEA ROAD
UnknownOver: NH101
1.1 MI FROM HAMPTON TL, Rockingham, NH
Built 1995 ADT: 43,525
NH101 EB
UnknownOver: NH111
.2 MI FROM HAMPTON TL, Rockingham, NH
Built 2000 ADT: 10,000
NH101 WB
UnknownOver: NH111
.2 mi Hampton TL, Rockingham, NH
Built 2000 ADT: 10,000
BREAKFAST HILL RD
UnknownOver: I-95
1.1 MI NORTH HAMPTON TL, Rockingham, NH
Built 1972 ADT: 62,595
OCEAN ROAD
UnknownOver: I-95
0.3 MI PORTSMOUTH TL, Rockingham, NH
Built 1972 ADT: 66,160
NH 84
UnknownOver: I-95
.25 MI N. SEABROOK T.L., Rockingham, NH
Built 1975 ADT: 84,000
NH 88
UnknownOver: I-95
.4 MI W. JCT RT 1, Rockingham, NH
Built 1975 ADT: 84,000
I-95 RAMP
UnknownOver: NH101
AT I-95 INTERCHANGE, Rockingham, NH
Built 1976 ADT: 41,000
NH101 EB
UnknownOver: I-95
2.0 MI FROM EXETER TL, Rockingham, NH
Built 1999 ADT: 66,160
NH101 WB
UnknownOver: I-95
HAMPTON, Rockingham, NH
Built 2000 ADT: 66,160
NH 27
UnknownOver: I-95
.5 MI N. HAMPTON T.L., Rockingham, NH
Built 1976 ADT: 63,884
I-95
UnknownOver: ACCESS ROAD
.3 MI FROM JCT RT 101, Rockingham, NH
Built 1950 ADT: 4,900
TOWLE FARM ROAD
UnknownOver: I-95
0.8 MI HAMPTON FALLS TL, Rockingham, NH
Built 1974 ADT: 84,000
NH 27
UnknownOver: NH101
.3 MI FROM JCT. I-95, Rockingham, NH
Built 1996 ADT: 20,000
TOWLE FARM ROAD
UnknownOver: NH101
0.3 MI FROM JCT. RT 95, Rockingham, NH
Built 1995 ADT: 18,000
NH101
UnknownOver: US 1 SB
2.3 MI. FROM JCT. RT 95, Rockingham, NH
Built 1963 ADT: 20,373
NH101
UnknownOver: US 1 NB
2.3 MI. FROM JCT. I-95, Rockingham, NH
Built 1963 ADT: 14,000
I-93 SB
UnknownOver: NH 28
1.7 MI S MANCHESTER CL, Rockingham, NH
Built 2013 ADT: 14,000
I-93 NB
UnknownOver: NH 28
1.7 MI S MANCHESTER TL, Rockingham, NH
Built 2014 ADT: 14,000
I-93 SB
UnknownOver: STONEHENGE ROAD
1.0 MI SO JCT RT 28, Rockingham, NH
Built 1996 ADT: 3,600
I-93 NB
UnknownOver: STONEHENGE ROAD
1.0 MI S JCT RT 28, Rockingham, NH
Built 1995 ADT: 3,600
ASH STREET
UnknownOver: I-93
0.7 MI N JCT NH 102, Rockingham, NH
Built 2019 ADT: 69,000
NH102
UnknownOver: I-93
0.7 MI N Derry T/L, Rockingham, NH
Built 2018 ADT: 71,000
WOODBURY AVENUE
UnknownOver: SP TPK,US 4,NH 16
0.8 MI FR PISCATAQUA DR, Rockingham, NH
Built 2015 ADT: 53,200
I-95(RAMP B-D)
UnknownOver: I-95
0.2 MI N OF HAMPTON TL, Rockingham, NH
Built 1976 ADT: 63,884
SOUTH ROAD
UnknownOver: I-95
0.7 MI JCT 101D, Rockingham, NH
Built 1975 ADT: 66,160
NH111
UnknownOver: I-95
1.2 MI JCT RTE 1, Rockingham, NH
Built 1975 ADT: 63,884
WALNUT AVE
UnknownOver: I-95
0.5 MI JCT NH151, Rockingham, NH
Built 1975 ADT: 63,884
NH151
UnknownOver: I-95
1.1 MI JCT 101D, Rockingham, NH
Built 1975 ADT: 66,160
NH 33
UnknownOver: I-95
3.0MI S OF MAINE S/L, Rockingham, NH
Built 1971 ADT: 97,000
SHERBURNE ROAD
UnknownOver: I-95
2.8MI S OF MAINE S/L, Rockingham, NH
Built 1971 ADT: 69,000
I-95 SB CONNECTOR
UnknownOver: I-95 NB RAMP
SP TPK,I-95 INTERCHANGE, Rockingham, NH
Built 1972 ADT: 9,000
NH 33
UnknownOver: US 1 BYPASS
0.6MI FROM JCT RT 1, Rockingham, NH
Built 2013 ADT: 11,000
Showing 251-300 of 2,542 bridges
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.
Understanding Bridge Conditions
How FHWA rates bridge condition on a 0-9 scale.
Check Your Daily Bridges
How to look up bridge condition data for bridges on your route.
Read our methodology — how this data is sourced, computed, and verified.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |