Total Bridges
2,542
Public highway bridges in New Hampshire
State profile · Near median Poor share
New Hampshire bridge safety
Condition ratings, load ratings, and Poor-condition data for every public highway bridge in New Hampshire, based on the FHWA National Bridge Inventory.
- 2,542
- Public bridges
- 43.0%
- Good condition
- 7.1%
- Poor condition
Data updated May 2026
Good Condition
43.0%
1,092 bridges rated 7-9
-7.0pp vs 50% benchmark
Poor Condition
7.1%
180 bridges whose lowest applicable component is rated 0-4
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 - Poor-condition share 23.6%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
New Hampshire vs nearby ranks
Adjacent states by Poor-condition share (lower share = better)
States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below New Hampshire on the same metric.
NY
New York
6.90% top marginal rate
KY
Kentucky
7.06% top marginal rate
NH
New Hampshire
7.08% top marginal rate
OK
Oklahoma
7.50% top marginal rate
NM
New Mexico
7.61% top marginal rate
Bridges Needing Most Attention in New Hampshire
Six lowest-condition bridges in New Hampshire, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.
OLD DEERFIELD ROAD
PoorOver: BROOK
185 FT FROM NH RTE 43, Rockingham, NH
Built 1920 Load: 1.8 t ADT: 190
TEMPLETON TURNPIKE
PoorOver: PRIEST BROOK
1.9MI. RTE 119, Cheshire, NH
Built 1984 Load: 2.7 t ADT: 86
DUDLEY ROAD
PoorOver: LAMPREY RIVER
.23 MI JCT 101, Rockingham, NH
Built 1914 Load: 2.9 t ADT: 535
SHOP ROAD
PoorOver: 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
PoorOver: PHILLIPS BROOK
100 FT FR SULLIVAN RD 61, Coos, NH
Built 1940 Load: 3.6 t ADT: 90
All Bridges in New Hampshire
ACCESS ROAD
UnknownOver: I-93 NB OFF RAMP
2.6 M NORTH MANCHESTER TL, Merrimack, NH
Built 1978 ADT: 4,100
I-93 SB
UnknownOver: NH 3A
1.0 MI N MANCHESTER CL, Merrimack, NH
Built 1976 ADT: 22,000
I-93 NB
UnknownOver: NH 3A
1.0 MI N MANCHESTER CL, Merrimack, NH
Built 1976 ADT: 22,000
MAIN STREET
UnknownOver: MERRIMACK RIVER,CSX,RD
0.7 MI N JCT US 3, Merrimack, NH
Built 1976 ADT: 1,000
DONATI DRIVE
UnknownOver: I-93
0.1 MI MANCHESTER CL, Merrimack, NH
Built 1976 ADT: 64,968
I-93 SB
UnknownOver: US 3,NH 28
0.2 MI MANCHESTER TL, Merrimack, NH
Built 1976 ADT: 21,000
I-93 NB
UnknownOver: US 3,NH 28
0.2 MI MANCHESTER TL, Merrimack, NH
Built 1976 ADT: 21,000
US202,NH 9
UnknownOver: HATFIELD ROAD
.7 MI EAST HENNIKER T.L., Merrimack, NH
Built 1961 ADT: 300
I-89 SB
UnknownOver: PINE STREET
3.2 MI E. OF WARNER T.L., Merrimack, NH
Built 1959 ADT: 180
I-89 NB
UnknownOver: PINE STREET
3.2 MI EAST OF WARNER T.L, Merrimack, NH
Built 1967 ADT: 180
NH127
UnknownOver: I-89
1.9 MI N JCT US202, Merrimack, NH
Built 1994 ADT: 24,500
I-89(SB RAMP)
UnknownOver: US202,NH 9 EB
1.9 MI E JCT RT 127, Merrimack, NH
Built 1959 ADT: 3,000
I-89 SB
UnknownOver: US202,NH 9
1.9 MI S. OF JCT RT 127, Merrimack, NH
Built 1959 ADT: 2,000
I-89 NB
UnknownOver: US202,NH 9
1.9 SO JCT RT 127, Merrimack, NH
Built 1959 ADT: 2,000
I-89 SB
UnknownOver: US202,NH 9 WB
1.9 MI E. JCT RT 127, Merrimack, NH
Built 1959 ADT: 2,700
SOUTH ROAD
UnknownOver: I-89
.8 MI E OF JCT US 202, Merrimack, NH
Built 1959 ADT: 34,400
I-89 SB
UnknownOver: I-89 RAMP
2.0 MI WEST CONCORD TL, Merrimack, NH
Built 1959 ADT: 2,000
I-89 NB
UnknownOver: I-89 RAMP
2.1 MI WEST OF CONCORD TL, Merrimack, NH
Built 1959 ADT: 1,422
JEWETT ROAD
UnknownOver: I-89
1.8 MI E JCT 202, Merrimack, NH
Built 1959 ADT: 38,926
I-89 SB
UnknownOver: NH 11
3.9 MI FROM SUTTON T.L., Merrimack, NH
Built 1967 ADT: 5,000
I-89 NB
UnknownOver: NH 11
4.0 MI FROM SUTTON TL, Merrimack, NH
Built 1967 ADT: 5,200
I-89 NB
UnknownOver: COUNTY ROAD
2.2 MI FROM SUTTON T.L., Merrimack, NH
Built 1967 ADT: 1,300
COUNTY ROAD
UnknownOver: I-89 SB
2.2 MI FROM SUTTON TL, Merrimack, NH
Built 1967 ADT: 9,100
I-89 SB
UnknownOver: BOG ROAD
1.4 MI FROMSUTTON TL, Merrimack, NH
Built 1967 ADT: 100
I-89 SB
UnknownOver: KING HILL ROAD
.3 MI FROM SUTTON TL, Merrimack, NH
Built 1967 ADT: 5,000
I-89 NB
UnknownOver: KING HILL ROAD
0.3 MI FROM SUTTON TL, Merrimack, NH
Built 1967 ADT: 5,200
NH132
UnknownOver: I-93
0.5MI FROM CANTERBURY T.L, Merrimack, NH
Built 1959 ADT: 33,000
I-393,US 4,US202W
UnknownOver: NH 9
.5 MI E CONCORD TL, Merrimack, NH
Built 1988 ADT: 8,200
I-89 SB
UnknownOver: NORTH HOMINY POT RD
0.6MI FROM NEW LONDON TL., Merrimack, NH
Built 1967 ADT: 240
I-89 NB
UnknownOver: NORTH HOMINY POT RD
0.5MI FROM NEW LONDON TL, Merrimack, NH
Built 1967 ADT: 240
I-89 SB
UnknownOver: GILE POND ROAD
3.8MI NEW LONDON T.L., Merrimack, NH
Built 1967 ADT: 1,300
I-89 NB
UnknownOver: GILE POND ROAD
3.7MI NEW LONDON T.L., Merrimack, NH
Built 1967 ADT: 1,300
I-89 NB
UnknownOver: STEVENS BROOK ROAD
0.2MI WARNER T.L., Merrimack, NH
Built 1967 ADT: 40
I-89 SB
UnknownOver: STEVENS BROOK ROAD
0.2MI WARNER T.L., Merrimack, NH
Built 1967 ADT: 40
I-89 SB
UnknownOver: NH103
6.3 MI HOPKINTON TL, Merrimack, NH
Built 1968 ADT: 7,600
I-89 NB
UnknownOver: NH103
6.3 MI FROM HOPKINTON TL, Merrimack, NH
Built 1968 ADT: 7,600
I-89 NB
UnknownOver: NORTH VILLAGE ROAD
5.2 MI HOPKINTON T.L., Merrimack, NH
Built 1966 ADT: 740
I-89 SB
UnknownOver: NORTH VILLAGE ROAD
5.2 MI HOPKINTON T.L., Merrimack, NH
Built 1966 ADT: 740
I-89 NB
UnknownOver: WEST JOPPA ROAD
4.4 MI HOPKINTON T.L., Merrimack, NH
Built 1966 ADT: 100
I-89 SB
UnknownOver: WEST JOPPA ROAD
4.5 MI HOPKINTON TL, Merrimack, NH
Built 1966 ADT: 100
NH103
UnknownOver: I-89 NB
3.6 MI N. HOPKINTON T.L., Merrimack, NH
Built 1966 ADT: 9,500
NH103
UnknownOver: I-89 SB,WARNER RIVER
3.6 MI N HOPKINTON T.L., Merrimack, NH
Built 1966 ADT: 8,500
I-89 SB
UnknownOver: NH103
0.4 MI HOPKINTON T.L., Merrimack, NH
Built 1966 ADT: 1,700
I-89 NB
UnknownOver: NH103
0.5 MI HOPKINTON T.L., Merrimack, NH
Built 1966 ADT: 1,700
NH101 EB
UnknownOver: KING STREET
3.5 MI JCT RTE 28, Rockingham, NH
Built 1961 ADT: 300
NH101 WB
UnknownOver: KING STREET
3.5 MI JCT RT. 28, Rockingham, NH
Built 1961 ADT: 300
NH101 EB
UnknownOver: HOOKSETT ROAD
1.7 MI MANCHESTER TL, Rockingham, NH
Built 1972 ADT: 100
NH101 WB
UnknownOver: HOOKSETT ROAD
1.7 MI MANCHESTER TL, Rockingham, NH
Built 1972 ADT: 100
NH101
UnknownOver: TOWER HILL ROAD
2.6 MI JCT RT 28, Rockingham, NH
Built 1964 ADT: 200
NH101 EB
UnknownOver: PINE ROAD
.2 MI EAST OF EXETER TL, Rockingham, NH
Built 1997 ADT: 2,700
Showing 201-250 of 2,542 bridges
Related
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.
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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.
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.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.