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
NH 16B
FairOver: WILDCAT BROOK
2.2 MI JCT 16A, Carroll, NH
Built 1964 Load: 26.5 t ADT: 151
GILMORE POND ROAD
FairOver: MOUNTAIN BROOK
0.6 MI FROM NH RTE 124, Cheshire, NH
Built 1920 Load: 26.5 t ADT: 619
OLD NH 9
FairOver: BEARDS BROOK
0.3MI JCT 9-31-202, Hillsborough, NH
Built 1951 Load: 26.5 t ADT: 2,998
NH111
FairOver: NASHUA RIVER
.7 MI FROM NASHUA TL, Hillsborough, NH
Built 1950 Load: 26.5 t ADT: 12,691
PIPER POND RD
FairOver: BROOK
TOWN RD, Merrimack, NH
Built 1983 Load: 26.5 t ADT: 90
NH125
FairOver: EXETER RIVER
.03 MI FR NH 111 A, Rockingham, NH
Built 1960 Load: 26.5 t ADT: 11,753
NH113A
FairOver: WHITEFACE RIVER
2.1 MI W TAMWORTH TL, Carroll, NH
Built 1941 Load: 26.6 t ADT: 250
OWEN ROAD
FairOver: BISHOP BROOK
0.3 MI FR BISHOP BROOK R, Coos, NH
Built 1915 Load: 26.6 t ADT: 90
FDR 15
FairOver: KEENAN BROOK
MAP 02, Coos, NH
Built 1964 Load: 26.6 t ADT: 99
EASTERN DIST ROAD
FairOver: SMITH RIVER
.07 MI FR SUNAPEE LAKE R, Merrimack, NH
Built 1949 Load: 26.6 t ADT: 139
NH140
FairOver: MERRYMEETING RIVER
3.1 MI FROM GILMANTON TL, Belknap, NH
Built 1940 Load: 26.8 t ADT: 2,433
NH110
FairOver: UPPER AMMONOOSUC RIVER
0.9 MI FROM DUMMER TL, Coos, NH
Built 1970 Load: 26.8 t ADT: 1,603
US 3
FairOver: NHRR
0.6 MI FROM VERMONT SL, Coos, NH
Built 1970 Load: 26.8 t ADT: 2,906
NH 31
FairOver: SOUHEGAN RIVER
.3 MI FROM GREENVILLE TL, Hillsborough, NH
Built 1951 Load: 26.8 t ADT: 4,450
NH 9
FairOver: MALLEGO BROOK
1.2MI FROM BARRINGTON TL, Strafford, NH
Built 1960 Load: 26.8 t ADT: 7,882
WEST SIDE ROAD
FairOver: LUCY BROOK
0.7 MI BARTLETT TL, Carroll, NH
Built 1976 Load: 26.9 t ADT: 3,201
NH 16
FairOver: SACO RIVER
1.6MI ALBANY TL, Carroll, NH
Built 1945 Load: 26.9 t ADT: 12,067
BRIDGE STREET
FairOver: ANDROSCOGGIN RIVER
0.17 MI JCT RTE 16, Coos, NH
Built 1969 Load: 26.9 t ADT: 975
US 3,NH 25
FairOver: PEMIGEWASSET RIVER,NHRR
BRIDGEWATER TL, Grafton, NH
Built 1937 Load: 26.9 t ADT: 2,614
GREAT HOLLOW ROAD
FairOver: MINK BROOK
.76 MI N LEBANON TL, Grafton, NH
Built 1901 Load: 26.9 t ADT: 2,125
CENTER HILL ROAD
FairOver: LITTLE SUNCOOK RIVER
200FT NH9, Merrimack, NH
Built 1978 Load: 26.9 t ADT: 90
NH114
FairOver: CONTOOCOOK RIVER
0.1 MI S OF JCT RTE 202, Merrimack, NH
Built 1939 Load: 26.9 t ADT: 4,676
NH113A
FairOver: WONALANCET RIVER
3.4 MI FROM SANDWICH TL, Carroll, NH
Built 1965 Load: 27.1 t ADT: 251
NH 16A
FairOver: WILDCAT BROOK
.55 MI N. JCT 16, Carroll, NH
Built 1931 Load: 27.2 t ADT: 1,482
NH 16
FairOver: ELLIS RIVER
1.5 MI JACKSON TL, Coos, NH
Built 1963 Load: 27.2 t ADT: 3,317
US 3
FairOver: BAGLEY BROOK
3.5 MI FROM CAMPTON TL, Grafton, NH
Built 1933 Load: 27.2 t ADT: 1,272
NH118
FairOver: LOST RIVER
0.1 MI W OF JCT RTE 112, Grafton, NH
Built 1941 Load: 27.2 t ADT: 504
NH 28 BYPASS
FairOver: COHAS BROOK
4.45 MI S AUBURN TL., Rockingham, NH
Built 1937 Load: 27.2 t ADT: 7,113
NH 26
FairOver: MOHAWK RIVER
3.5 MI WEST DIXVILLE TL, Coos, NH
Built 1929 Load: 27.3 t ADT: 1,584
US 3
FairOver: WEST BRANCH BROOK
0.6 MI FROM THORNTON TL, Grafton, NH
Built 1927 Load: 27.3 t ADT: 1,117
NH116
FairOver: HAM BRANCH
1.0 MI S. FRANCONIA T.L., Grafton, NH
Built 1933 Load: 27.3 t ADT: 824
NH 43
FairOver: NORTH BRANCH RIVER
.3 MI FROM RAYMOND TL, Rockingham, NH
Built 1961 Load: 27.3 t ADT: 5,527
MILL BROOK ROAD
FairOver: MILL BROOK
3.3 MI S. JCT. 302, Grafton, NH
Built 1928 Load: 27.4 t ADT: 174
I-89 NB
FairOver: NH114
1.9MI NEW LONDON T.L., Merrimack, NH
Built 1967 Load: 27.4 t ADT: 9,260
WYMAN AVE
FairOver: PISCATAQUA RIV BACK CHNL
0.1 KM SOUTH OF SR 103, Rockingham, NH
Built 1941 Load: 27.5 t ADT: 4,000
NH 25C
FairOver: EASTMAN BROOK
4.11 MI. NW OF WARREN TL, Grafton, NH
Built 1949 Load: 27.6 t ADT: 442
TANNERY LANE
FairOver: TANNERY POND OUTLET
170 FT. FROM VILLAGE ROAD, Merrimack, NH
Built 1910 Load: 27.6 t ADT: 90
WEBSTER GROVES RD
FairOver: COUNTRY POND OUTLET
KINGSTON TL, Rockingham, NH
Built 1980 Load: 27.6 t ADT: 10
MARKET STREET EB
FairOver: TIDAL BASIN
.5 MI E JCT I-95, Rockingham, NH
Built 1971 Load: 27.6 t ADT: 8,968
GREGG MILL ROAD
FairOver: S BR PISCATAQUOG RIVER
164 FT FR RIVER ROAD, Hillsborough, NH
Built 1938 Load: 27.7 t ADT: 606
NORTH ROAD
FairOver: ANDROSCOGGIN RIVER
0.26 MI N US 2, Coos, NH
Built 1973 Load: 27.8 t ADT: 278
TOWN FOREST ROAD
FairOver: COCKERMOUTH RIVER
0.1 MI FROM GROTON ROAD, Grafton, NH
Built 2007 Load: 27.8 t ADT: 50
NH175
FairOver: PEMIGEWASSET RIVER
0.5 MI EAST JCT US 3, Grafton, NH
Built 1976 Load: 27.8 t ADT: 672
HANNAH NUTTER ROAD
FairOver: BIG RIVER
0.1 MI FR NEW ROCHESTER, Belknap, NH
Built 1940 Load: 27.9 t ADT: 90
NH 25
FairOver: RED HILL RIVER
3.8 MI FROM CTR HARBOR TL, Carroll, NH
Built 1940 Load: 27.9 t ADT: 9,727
NH 63
FairOver: MILL BROOK
1.3 MI FROM JCT RTE 12, Cheshire, NH
Built 1930 Load: 27.9 t ADT: 1,029
US 4
FairOver: INDIAN RIVER
4.9 MILES FROM ENFIELD TL, Grafton, NH
Built 1978 Load: 27.9 t ADT: 5,839
PAYNE ROAD
FairOver: MASCOMA RIVER
.19 MI. FROM JCT. US 4, Grafton, NH
Built 1938 Load: 27.9 t ADT: 182
NH113
FairOver: FORREST BROOK
1.9 MI NE TAMWORTH TL, Carroll, NH
Built 1955 Load: 28.0 t ADT: 2,751
GOV'NRS ISLAND RD
FairOver: LAKE WINNIPESAUKEE
AT LACONIA/GILFORD TL, Belknap, NH
Built 1981 Load: 28.1 t ADT: 1,682
Showing 701-750 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.