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
TERRACE STREET
FairOver: MINNEWAWA BROOK
210 FT FR NH RTE 101, Cheshire, NH
Built 1922 Load: 29.9 t ADT: 175
ELLSWORTH HILL RD
FairOver: CONNOR BROOK
3.6 MI ELLSWORTH TL, Grafton, NH
Built 1934 Load: 29.9 t ADT: 1,125
NH103
FairOver: LAKE TODD OUTLET
0.1 MI FROM NEWBURY TL, Merrimack, NH
Built 1967 Load: 29.9 t ADT: 4,601
US 3,NH 11
FairOver: MILE HILL ROAD
0.5 MI FROM BELMONT T.L., Belknap, NH
Built 1967 Load: 30.0 t ADT: 9,238
TOWN HALL ROAD
FairOver: EAST BRANCH SACO RIVER
1.9 MI FR NH 16&US 302, Carroll, NH
Built 1976 Load: 30.0 t ADT: 90
HANOVER CENTER RD
FairOver: BROOK
0.7 MI FR LYME TL, Grafton, NH
Built 1940 Load: 30.0 t ADT: 1,214
WEST HOLLIS ROAD
FairOver: NISSITISSIT RIVER
.1 MI N. MASS. LINE, Hillsborough, NH
Built 1978 Load: 30.0 t ADT: 1,513
I-89 NB
FairOver: OTTERVILLE ROAD
4.0 MI FROM SUTTON T.L., Merrimack, NH
Built 1967 Load: 30.0 t ADT: 9,100
NH 11
FairOver: CASCADE BROOK
1.7 MI FROM NEW LONDON TL, Merrimack, NH
Built 1960 Load: 30.0 t ADT: 5,015
NO DATA ENTERED
FairOver: SAWYER RIVER
MAP 32, Carroll, NH
Built 1978 Load: 30.1 t ADT: 50
WASHINGTON STREET
FairOver: SWIFT RIVER
0.2 MI FR WASHINGTON ST, Carroll, NH
Built 1975 Load: 30.2 t ADT: 1,214
I-93 SB
FairOver: STEVENS POND
0.1 MI N BRIDGE ST, Hillsborough, NH
Built 1976 Load: 30.2 t ADT: 27,691
WINNICUT ROAD
FairOver: WINNICUT RIVER
.31 MI. NW N. HAMPTON TL, Rockingham, NH
Built 1931 Load: 30.2 t ADT: 1,828
BUFFUMSVILLE RD
FairOver: SALMON FALLS RIVER
AT ME STATE LINE RD 60-5, Strafford, NH
Built 1982 Load: 30.2 t ADT: 1,688
COOPER STREET
FairOver: OTTER POND OUTLET
255FT. RTE.11, Sullivan, NH
Built 1920 Load: 30.2 t ADT: 238
NH 16
FairOver: CHOCORUA RIVER
3.6 MI FROM OSSIPEE TL, Carroll, NH
Built 1937 Load: 30.4 t ADT: 6,537
NH 25
FairOver: CONNECTICUT RIVER
VERMONT STATE LINE, Grafton, NH
Built 1929 Load: 30.4 t ADT: 2,356
I-93,US 4 SB
FairOver: MERRIMACK RIVER
1.5 MI N. JCT RT3, Merrimack, NH
Built 1959 Load: 30.4 t ADT: 25,221
I-93,US 4 NB
FairOver: MERRIMACK RIVER
1.5 MI N. JCT. RT.3, Merrimack, NH
Built 1959 Load: 30.4 t ADT: 25,274
NO DATA ENTERED
FairOver: TUNNEL STREAM SALE
NO DATA ENTERED, Grafton, NH
Built 2006 Load: 30.5 t ADT: 99
WINCHESTER STREET
FairOver: ASHUELOT RIVER
DOWNTOWN KEENE, Cheshire, NH
Built 1965 Load: 30.6 t ADT: 11,016
I-93 NB
FairOver: US 3,PEMIGEWASSET RIVER
2.6 MI PLYMOUTH T.L., Grafton, NH
Built 1969 Load: 30.6 t ADT: 9,864
I-93 SB
FairOver: US 3,PEMIGEWASSET RIVER
2.7 MI PLYMOUTH TL, Grafton, NH
Built 1969 Load: 30.6 t ADT: 9,903
TITUS ROAD
FairOver: MILL BROOK
7.7 MI LISBON T.L., Grafton, NH
Built 1927 Load: 30.6 t ADT: 78
CROSS ROAD
FairOver: ROCKY BRANCH
0.6 MI FR NO DORCHESTER, Grafton, NH
Built 2018 Load: 30.6 t ADT: 90
I-93 NB
FairOver: E BR PEMIGEWASSET RIVER
0.5 MI LINCOLN TL, Grafton, NH
Built 1972 Load: 30.6 t ADT: 7,054
I-89 SB
FairOver: NH 10
5.01 MI FROM SPRINGFIELD, Sullivan, NH
Built 1972 Load: 30.6 t ADT: 10,825
US302
FairOver: NHRR
4.2 MI.BARTLETT T.L., Carroll, NH
Built 1978 Load: 30.7 t ADT: 2,768
SANDWICH NOTCH RD
FairOver: ALGONQUIN BROOK
1.9 MI FR THORNTON TL, Carroll, NH
Built 1983 Load: 30.8 t ADT: 90
NH 12
FairOver: S BR ASHUELOT RIVER
0.7MI SWANZEY T.L., Cheshire, NH
Built 1962 Load: 30.8 t ADT: 8,843
I-93 NB
FairOver: NH 18,NH116
0.7 M N SUGARHILL TL, Grafton, NH
Built 1972 Load: 30.8 t ADT: 2,848
I-89 SB
FairOver: OTTERVILLE ROAD
4.4 MI FROM SUTTON TL, Merrimack, NH
Built 1967 Load: 30.8 t ADT: 9,263
I-89 NB
FairOver: COLUMBUS AVENUE
2.9 MI FROM SUTTON T.L., Merrimack, NH
Built 1967 Load: 30.8 t ADT: 9,607
OLD NH 10
FairOver: SKINNER BROOK
3.11 MI. N. OF CROYDON TL, Sullivan, NH
Built 1930 Load: 30.8 t ADT: 90
BUCK RD,OLD NH120
FairOver: MINK BROOK
BUCK RD @ MINK BROOK, Grafton, NH
Built 1936 Load: 30.9 t
NH 10
FairOver: MIREY BROOK
0.2 MI FROM JCT RTE 78, Cheshire, NH
Built 1940 Load: 31.0 t ADT: 8,782
US302
FairOver: AMMONOOSUC RIVER
3.5 MI. EAST INT US3, Coos, NH
Built 1974 Load: 31.0 t ADT: 4,613
NH 26
FairOver: MOHAWK RIVER
0.2 MI FROM JCT US 3, Coos, NH
Built 1973 Load: 31.0 t ADT: 2,779
I-89,NH 10 SB RAMP
FairOver: MASCOMA RIVER,ROAD-GATED
2.7 MI FROM VT S.L., Grafton, NH
Built 1966 Load: 31.0 t ADT: 4,564
I-93 SB
FairOver: AMMONOOSUC RIVER
2.1 MI BETHLEHEM TL, Grafton, NH
Built 1960 Load: 31.0 t ADT: 4,433
NH114
FairOver: PISCATAQUOG RIVER
GOFFSTOWN TL, Hillsborough, NH
Built 1972 Load: 31.0 t ADT: 9,162
RUSH ROAD
FairOver: AMEY BROOK
0.14 MI N JCT 202, Merrimack, NH
Built 1935 Load: 31.0 t ADT: 937
I-89 SB
FairOver: TRUCK ROAD,MASCOMA RIVER
5.9 MI ENFIELD TL, Grafton, NH
Built 1966 Load: 31.2 t ADT: 19,605
I-93 SB
FairOver: NH112,NHRR
0.27 NE LINCOLN TL, Grafton, NH
Built 1972 Load: 31.2 t ADT: 10,383
GRANITE STREET
FairOver: RECREATION TRAIL
0.42MI RTE 3, Hillsborough, NH
Built 1900 Load: 31.2 t ADT: 618
I-89 SB
FairOver: NH114
2.0MI NEW LONDON T.L., Merrimack, NH
Built 1967 Load: 31.2 t ADT: 9,249
I-93 SB
FairOver: NH104,NH132
1.05 MI N MERIDITH T.L., Belknap, NH
Built 1963 Load: 31.4 t ADT: 19,519
NH 12
FairOver: S BRANCH ASHUELOT RIVER
0.4MI FROM SWANZEY T.L., Cheshire, NH
Built 1962 Load: 31.4 t ADT: 8,843
NH 12
FairOver: S BR ASHUELOT RIVER
1.7MI FROM SWANZEY T.L., Cheshire, NH
Built 1962 Load: 31.4 t ADT: 8,843
I-93 NB
FairOver: STEVENS POND
0.1 MI N BRIDGE ST., Hillsborough, NH
Built 1977 Load: 31.4 t ADT: 36,111
Showing 801-850 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.