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
GARLAND ROAD
UnknownOver: NH 28
1.0 MI FROM PITTSFIELD TL, Belknap, NH
Built 1969 ADT: 11,000
NH 28
UnknownOver: BEAUTY HILL ROAD
1.3 MI FR PITTSFIELD T.L., Belknap, NH
Built 1969
US 3,NH 11
UnknownOver: US 3,NH 11
3.4 MI FROM LACONIA T.L., Belknap, NH
Built 1965 ADT: 14,000
MORRILL STREET
UnknownOver: US 3,NH 11 BYPASS
2.5 MI FROM LACONIA TL, Belknap, NH
Built 1965 ADT: 9,275
NH106
UnknownOver: US 3,NH 11
.4 MI BELMONT TL, Belknap, NH
Built 1964 ADT: 7,700
I-93 SB
UnknownOver: NH132
SANBORNTON T.L., Belknap, NH
Built 1963 ADT: 580
PINNACLE HILL ROAD
UnknownOver: I-93
1.1 MI MEREDITH TL, Belknap, NH
Built 1963 ADT: 25,000
I-93 NB
UnknownOver: NH104,NH132
1.1 MI MEREDITH TL, Belknap, NH
Built 1963 ADT: 8,900
I-93 NB
UnknownOver: NH132
5.2 MI MEREDITH TL, Belknap, NH
Built 1964 ADT: 1,400
US 3,NH 11,NH132
UnknownOver: I-93
.1 MI WINNIPESAUKEE RIVER, Belknap, NH
Built 2000 ADT: 27,326
NH 16
UnknownOver: NH 25
6.0 MI TAMWORTH T.L., Carroll, NH
Built 1969 ADT: 4,600
NH101
UnknownOver: GOLDMINE ROAD
0.6 MI PETERBOROUGH TL, Cheshire, NH
Built 1967 ADT: 380
NH 9,NH 10
UnknownOver: NH 12
NORTH JCT OF NH 9, 10 &12, Cheshire, NH
Built 1978 ADT: 15,000
COURT ST
UnknownOver: NH 9,NH 10
1.1 MI FROM KEENE CENTER, Cheshire, NH
Built 1977 ADT: 12,000
NH 9
UnknownOver: OLD NH 9,GRANITE LK OUT
1.1 MI E SULLIVAN TL, Cheshire, NH
Built 1994 ADT: 210
MURDOUGH HILL ROAD
UnknownOver: NH 9
1.6 MI EAST SULLIVAN TL, Cheshire, NH
Built 1994 ADT: 6,300
NORTH ASHLAND ROAD
UnknownOver: I-93
.3MI FROM HOLDERNESS, Grafton, NH
Built 1963 ADT: 17,000
I-93 SB
UnknownOver: US 3,NH 25
0.8 MI NEW HAMPTON T/L, Grafton, NH
Built 1963 ADT: 2,700
I-93 NB
UnknownOver: US 3, NH 25
0.8 MI FROM NEW HAMPTON T, Grafton, NH
Built 1963 ADT: 2,200
US302,NH 18,NH116
UnknownOver: I-93
2.1 MI SUGARHILL TL, Grafton, NH
Built 1959 ADT: 6,800
WEST FARM ROAD
UnknownOver: I-93
1.7 MI SUGARHILL TL, Grafton, NH
Built 1959 ADT: 6,200
EASTMAN HILL ROAD
UnknownOver: I-89,NH 10
0.2 MI LEBANON T.L., Grafton, NH
Built 1961 ADT: 21,200
I-89,NH 10 SB
UnknownOver: SMITH POND ROAD
2.2 MI FROM GRANTHAM T.L., Grafton, NH
Built 1959 ADT: 40
I-89,NH 10 NB
UnknownOver: SMITH POND ROAD
2.2 MI GRANTHAM T.L., Grafton, NH
Built 1959 ADT: 40
I-93 SB ON RAMP
UnknownOver: I-93
4.9 MI LINCOLN TL, Grafton, NH
Built 1959 ADT: 5,000
NH 18
UnknownOver: I-93 PARKWAY
3 MI.N LINCOLN TL, Grafton, NH
Built 1986 ADT: 8,400
I-89 SB OFF RAMP
UnknownOver: PLAZA CONNECTOR ROAD
SB OFF RAMP AT EXIT 20, Grafton, NH
Built 2012 ADT: 100
I-89 SB
UnknownOver: PLAZA CONNECTOR ROAD
0.4 MI EAST OF VT/NH LINE, Grafton, NH
Built 2012 ADT: 150
I-89 NB
UnknownOver: PLAZA CONNECTOR ROAD
0.4 MI EAST OF VT/NH LINE, Grafton, NH
Built 2012 ADT: 100
I-89 SB
UnknownOver: NH 12A
0.5 MI FROM VT S.L., Grafton, NH
Built 2012 ADT: 14,000
I-89 NB
UnknownOver: NH 12A
0.5 MI FROM VT. S.L., Grafton, NH
Built 2012 ADT: 14,000
POVERTY LANE
UnknownOver: I-89
2.3 MI FROM VT S.L., Grafton, NH
Built 1966 ADT: 35,900
I-89 NB
UnknownOver: US 4,NH 10
2.6 MI FROM VT SL, Grafton, NH
Built 1966 ADT: 14,000
I-89 SB
UnknownOver: US 4,NH 10
2.6 MI FROM VT S.L., Grafton, NH
Built 1966 ADT: 13,000
MASCOMA STREET
UnknownOver: I-89,NH 10
5.5 MI ENFIELD TL, Grafton, NH
Built 1966 ADT: 29,400
NH120
UnknownOver: I-89
.7MI FROM JCT RTE 4, Grafton, NH
Built 1966 ADT: 35,100
I-89 NB
UnknownOver: HEATER ROAD
0.6 MI FROM HARDY HILL RD, Grafton, NH
Built 1966 ADT: 2,300
I-89 SB
UnknownOver: MASCOMA R,RIVERSIDE DR
2.0MI FROM ENFIELD T.L., Grafton, NH
Built 1966 ADT: 1,700
I-89,NH 10 NB
UnknownOver: US 4
3.0 MI FROM ENFIELD T.L., Grafton, NH
Built 1966 ADT: 3,900
I-89,NH 10 SB
UnknownOver: US 4
1.9 MI FROM ENFIELD T.L., Grafton, NH
Built 1966 ADT: 4,800
I-89,NH 10 NB
UnknownOver: RIVERSIDE DR,MASCOMA RIV
2.0 MIFROM ENFIELD T.L., Grafton, NH
Built 1966 ADT: 1,500
I-93 SB
UnknownOver: US 3
1.74 MI N WOODSTOCK TL, Grafton, NH
Built 1973 ADT: 2,900
I-93 NB
UnknownOver: US 3
1.7 MI NORTH WOODSTOCK T, Grafton, NH
Built 1985 ADT: 2,900
HILLTOP ROAD
UnknownOver: I-93
0.24MI. FROM RD. #14, Grafton, NH
Built 1985 ADT: 6,800
NH135
UnknownOver: I-93
4 MI N OF BETHLEHEM TL, Grafton, NH
Built 1981 ADT: 6,900
US302,NH 10
UnknownOver: I-93
2.4 MI BETHLEHEM TL, Grafton, NH
Built 1960 ADT: 6,900
US 3
UnknownOver: US 3A, NH 25 WB
4.1 MI FROM RUMNEY TL, Grafton, NH
Built 1965 ADT: 10,000
I-93 SB
UnknownOver: I-93 NB RAMPS
0.4 MI FROM HOLDERNESS TL, Grafton, NH
Built 1964 ADT: 3,900
I-93 NB
UnknownOver: I-93 NB RAMPS
0.4 MI FR HOLDERNESS TL, Grafton, NH
Built 1964 ADT: 2,200
I-93 SB
UnknownOver: MIRROR LAKE ROAD
0.24 MI THORNTON TL, Grafton, NH
Built 1970 ADT: 100
Showing 1-50 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.