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
NH106,MAIN ST
FairOver: WINNIPESAUKEE RIVER
1.0 MI BELMONT T.L., Belknap, NH
Built 1970 Load: 33.3 t ADT: 18,428
NH 11
FairOver: ELBOW BROOK
5.8 MI FROM FRANKLIN TL, Merrimack, NH
Built 1934 Load: 33.3 t ADT: 2,886
I-93 SB
FairOver: NH132
2.5MI S. TILTON TL, Merrimack, NH
Built 1959 Load: 33.3 t ADT: 17,641
I-89 NB
FairOver: NH 10
4.9 MI FROM SPRINGFIELD T, Sullivan, NH
Built 1959 Load: 33.3 t ADT: 10,644
I-95
FairOver: PISCATAQUA RIVER
I-95 AT MAINE STATE LINE, Rockingham, NH
Built 1971 Load: 33.4 t ADT: 73,085
I-93 SB
FairOver: NH175A
1.0 MI ASHLAND T.L., Grafton, NH
Built 1963 Load: 33.5 t ADT: 11,400
I-93 NB
FairOver: NH175A
1.0 MI ASHLAND T.L., Grafton, NH
Built 1963 Load: 33.5 t ADT: 10,709
TOWN HOUSE ROAD
FairOver: MILL BROOK
2.4 MI. FROM JCT. 12-A, Sullivan, NH
Built 1940 Load: 33.5 t ADT: 632
MILL STREET
FairOver: MILL TAIL RACE
.25 MI JCT NH 12, Cheshire, NH
Built 1936 Load: 33.6 t ADT: 90
NORTHSIDE ROAD
FairOver: NASH STREAM
1.3 MI. NORTHUMBERLAND TL, Coos, NH
Built 1977 Load: 33.6 t ADT: 342
ELM AVENUE
FairOver: NORTH BRANCH RIVER
0.06MI NH9, Hillsborough, NH
Built 1984 Load: 33.6 t ADT: 535
I-89(RAMP F)
FairOver: TURKEY RIVER
BOW INTERCHANGE, Merrimack, NH
Built 1959 Load: 33.6 t ADT: 4,580
NH104
FairOver: BOG POND BROOK
2.4 MI SW HILL TL, Merrimack, NH
Built 1930 Load: 33.6 t ADT: 3,469
US202,NH 9
FairOver: ELM BROOK
2.4 MI E. HENNIKER T.L., Merrimack, NH
Built 1961 Load: 33.6 t ADT: 16,732
NH 10
FairOver: EASTMAN BROOK
1.4 MI FROM ORFORD T.L., Grafton, NH
Built 1952 Load: 33.7 t ADT: 1,223
BROOK ROAD
FairOver: BROCK BROOK
0.3 MI FR SHIN VALLEY RD, Grafton, NH
Built 1930 Load: 33.8 t ADT: 90
WEST SHORE ROAD
FairOver: FOWLER RIVER
0.7 MI FROM ALEXANDRIA TL, Grafton, NH
Built 1931 Load: 33.8 t ADT: 1,710
WEST SHORE ROAD
FairOver: NEWFOUND RIVER
2.7 MI FROM DANBURY TL, Grafton, NH
Built 1944 Load: 33.8 t ADT: 3,898
FDR 15
FairOver: W.BR.AMMONOOSUC RIVER
MAP 02, Coos, NH
Built 2005 Load: 34.0 t ADT: 99
OLD NH 11
FairOver: MERRYMEETING RIVER
0.2 MI SE ALTON TL, Strafford, NH
Built 1926 Load: 34.1 t ADT: 785
WESTGATE ROAD
FairOver: BLOW-ME-DOWN BROOK
0.5 MI. RTE.12A, Sullivan, NH
Built 1981 Load: 34.1 t ADT: 180
PRESCOTT ROAD
FairOver: SALMON BROOK
250FT. RTE. 127, Belknap, NH
Built 1969 Load: 34.3 t ADT: 1,268
FDR 400
FairOver: BEEBE RIVER
MAP 45, Carroll, NH
Built 1982 Load: 34.3 t ADT: 50
NH118
FairOver: BLODGETT BROOK
3.3 MI FROM WOODSTOCK TL, Grafton, NH
Built 1960 Load: 34.3 t ADT: 1,127
SAUNDERS HILL ROAD
FairOver: BAKER RIVER
0.06 MI. W OF NH 25, Grafton, NH
Built 1928 Load: 34.3 t ADT: 21
RIVER ROAD
FairOver: LOVEJOY BROOK
1.6 MI FROM BARTLETT TL, Carroll, NH
Built 1961 Load: 34.5 t ADT: 4,565
SANDWICH NOTCH RD
FairOver: BEARCAMP RIVER
5.4 MI FR THORNTON TL, Carroll, NH
Built 1983 Load: 34.5 t ADT: 90
SANDWICH NOTCH RD
FairOver: BEARCAMP RIVER
5.1 MI FR THORNTON TL, Carroll, NH
Built 1983 Load: 34.5 t ADT: 90
NH 26
FairOver: CLEAR STREAM
0.2 MI NW MILLSFIELD TL, Coos, NH
Built 1951 Load: 34.5 t ADT: 971
STREETER POND ROAD
FairOver: AMMONOOSUC RIVER
30 FT FROM RTE 302, Grafton, NH
Built 1980 Load: 34.5 t ADT: 789
NH 31
FairOver: STONY BROOK
1.5 MI FM LYNDEBOROUGH TL, Hillsborough, NH
Built 1928 Load: 34.5 t ADT: 3,806
CHASE ROAD
FairOver: POWWOW RIVER
.2 MI. SW OF NH 107-A, Rockingham, NH
Built 1967 Load: 34.5 t ADT: 688
RAMSDELL ROAD
FairOver: CONTOOCOOK RIVER
.09 MI FR NH RTE 114, Merrimack, NH
Built 1937 Load: 34.6 t ADT: 523
NH101
FairOver: DRAKESIDE ROAD
0.6 MI FROM JCT 101C, Rockingham, NH
Built 1963 Load: 34.6 t ADT: 11,203
NH 12A
FairOver: MASCOMA RIVER
2.7 MI. N. PLAINFIELD TL, Grafton, NH
Built 1977 Load: 34.7 t ADT: 12,592
WENTWORTH ROAD
FairOver: GREAT BROOK
1.9 MI FR WESTMORELAND T, Cheshire, NH
Built 1950 Load: 35.1 t ADT: 319
NH 77,NH114
FairOver: PISCATAQUOG RIVER
1.9 MI S OF HENNIKER TL, Hillsborough, NH
Built 1939 Load: 35.1 t ADT: 7,655
NH127
FairOver: SPILLWAY CHANNEL
2.77 MI JCT US 202, Merrimack, NH
Built 1961 Load: 35.1 t ADT: 3,357
EAST MILAN ROAD
FairOver: HORNE BROOK
0.98 MI MILAN, Coos, NH
Built 1932 Load: 35.3 t ADT: 1,101
I-95
FairOver: PREBLE WAY,CSX
Approach to High Level Br, Rockingham, NH
Built 1971 Load: 35.3 t ADT: 73,085
PLEASANT VALLEY RD
FairOver: OTTER BROOK
.7 MI FR LOST NATION #51, Coos, NH
Built 1980 Load: 35.4 t ADT: 90
SLAYTON HILL ROAD
FairOver: MASCOMA RIVER
.09 MI FROM US RTE NO 4, Grafton, NH
Built 1972 Load: 35.4 t ADT: 1,365
I-93 SB
FairOver: NH 18,NH135
AT JCT NH 18 AND NH 135, Grafton, NH
Built 1983 Load: 35.4 t ADT: 3,262
US 3,NH 11,NH132
FairOver: GULF BROOK
3.3 MI NE FRANKLIN TL, Belknap, NH
Built 1936 Load: 35.5 t ADT: 22,764
NORTH ROAD
FairOver: LEADMINE BROOK
1.1 MI N JCT US 2, Coos, NH
Built 1960 Load: 35.5 t ADT: 90
NH 25,NH113
FairOver: COLD BROOK
1.9 MI FROM SANDWICH T.L., Carroll, NH
Built 1938 Load: 35.7 t ADT: 4,973
NH104
FairOver: PEMIGEWASSET RIVER
NEW HAMPTON TL, Grafton, NH
Built 1987 Load: 35.7 t ADT: 9,160
US202, NH123
FairOver: FERGUSON BROOK
.07 MI. FROM PETERBORO TL, Hillsborough, NH
Built 1959 Load: 35.7 t ADT: 5,007
US202,NH 11
FairOver: NHNCRR
.5 MI E OF SPAULDING TPK, Strafford, NH
Built 1957 Load: 35.7 t ADT: 16,131
NH 16
FairOver: MOOSE BROOK
3.8 MI BERLIN TL, Coos, NH
Built 1972 Load: 36.1 t ADT: 10,136
Showing 951-1,000 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.