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
NORTH ROAD
FairOver: SMITH RIVER
.36 MI. NW JCT. 104 AND 4, Merrimack, NH
Built 1936 Load: 24.5 t ADT: 501
US 4
FairOver: NHRR(ABD)
2.4 MI FROM WILMOT TL, Merrimack, NH
Built 1937 Load: 24.5 t ADT: 2,454
CLOUGH HILL ROAD
FairOver: SOUCOOK RIVER
0.1 MI FR NH 106, Merrimack, NH
Built 1960 Load: 24.5 t ADT: 1,627
NH 1B
FairOver: PISCATAQUA ESTUARY
1.1 MI FROM JCT RT 1A, Rockingham, NH
Built 1955 Load: 24.5 t ADT: 2,973
EPPING STREET
FairOver: LAMPREY RIVER
0.3 MI FROM NH RTE 107, Rockingham, NH
Built 1948 Load: 24.5 t ADT: 2,762
NH152
FairOver: LAMPREY RIVER
1.0 MI FROM NEWMARKET TL, Strafford, NH
Built 1933 Load: 24.5 t ADT: 1,860
CITIZENS STREET
FairOver: SUGAR RIVER
100 FT JCT RTE 12, Sullivan, NH
Built 1959 Load: 24.5 t ADT: 1,325
FDR 30
FairOver: MAD RIVER
MAP 38, Grafton, NH
Built 1949 Load: 24.6 t ADT: 50
US 3,NH 25
FairOver: BAKER RIVER
4.3 MI FM BRIDGEWATER TL, Grafton, NH
Built 1930 Load: 24.7 t ADT: 4,270
NH101
FairOver: JOE ENGLISH BROOK
1.15 MI SW BEDFORD TL, Hillsborough, NH
Built 1936 Load: 24.7 t ADT: 17,501
US202
FairOver: CSX
.1 MI. WEST OF JCT I-93, Merrimack, NH
Built 1949 Load: 24.7 t ADT: 44,531
NO DATA ENTERED
FairOver: CLAYBANK BROOK
NO DATA ENTERED, Carroll, NH
Built 1974 Load: 24.9 t ADT: 99
US 3
FairOver: CONE BROOK
3.7 MI NE STRATFORD TL, Coos, NH
Built 1952 Load: 24.9 t ADT: 3,178
BASE STATION ROAD
FairOver: BLACK BROOK
2.98 MI NE JCT RTE US 302, Coos, NH
Built 1934 Load: 24.9 t ADT: 1,775
NH110
FairOver: MILL BROOK
3.8 MI NORTHUMBERLAND TL, Coos, NH
Built 1963 Load: 24.9 t ADT: 1,923
FDE 92
FairOver: S.BR.GALE RIVER
MAP 19, Grafton, NH
Built 1972 Load: 24.9 t ADT: 50
LAKE SHORE DRIVE
FairOver: SUCKER BROOK
.37 MI. N. OF JCT. NH 11, Merrimack, NH
Built 1942 Load: 24.9 t ADT: 363
CRAIG ROAD
FairOver: STANLEY BROOK
0.5 MI. RTE 137, Cheshire, NH
Built 1935 Load: 25.1 t ADT: 232
NH 63
FairOver: KILBURN BROOK
4.4 MI S CHESTERFIELD TL, Cheshire, NH
Built 1936 Load: 25.1 t ADT: 1,619
GREAT BROOK ROAD
FairOver: GREAT BROOK
380 FT FR NH RTE 120, Grafton, NH
Built 1936 Load: 25.1 t ADT: 105
NH 31
FairOver: BLOOD BROOK
0.2 MI FROM JCT RTE 101, Hillsborough, NH
Built 1937 Load: 25.1 t ADT: 4,322
NH104
FairOver: SMITH RIVER
1.0 MI FROM HILL TL, Merrimack, NH
Built 1940 Load: 25.1 t ADT: 3,469
NH120
FairOver: BLOW-ME-DOWN BROOK
0.8 MI FROM PLAINFIELD TL, Sullivan, NH
Built 1933 Load: 25.1 t ADT: 2,172
NH112,LOST RIV RD
FairOver: CLAY BROOK
3.5 MI FROM LANDAFF TL, Grafton, NH
Built 1932 Load: 25.2 t ADT: 1,652
BUTTER HILL ROAD
FairOver: MCDONOUGH BROOK
0.4 MI FR NH RTE 113, Carroll, NH
Built 1955 Load: 25.3 t ADT: 90
NUTTING ROAD
FairOver: CONTOOCOOK RIVER
215 FT FR NH RTE 137, Cheshire, NH
Built 1905 Load: 25.3 t ADT: 90
BESSIE PIERCE ROAD
FairOver: PARTRIDGE BROOK
1.48MI NH 63, Cheshire, NH
Built 1936 Load: 25.3 t ADT: 10
NO DATA ENTERED
FairOver: INDIGO SALE
NO DATA ENTERED, Grafton, NH
Built 2015 Load: 25.3 t ADT: 99
EAST MADISON ROAD
FairOver: FORREST BROOK
420 FT FROM NH RTE 113 ^, Carroll, NH
Built 1958 Load: 25.4 t ADT: 842
OLD COUNTY RD S
FairOver: BRENNAN BROOK
TOWN RD, Hillsborough, NH
Built 1930 Load: 25.4 t ADT: 27
NH111A
FairOver: LITTLE RIVER
1.75 MI. TO BRENTWOOD TL, Rockingham, NH
Built 1934 Load: 25.4 t ADT: 2,463
NH108
FairOver: EXETER RIVER
0.3 MI FROM KENSINGTON TL, Rockingham, NH
Built 1935 Load: 25.4 t ADT: 5,591
WESTPORT ROAD
FairOver: ASHUELOT RIVER
.68 MI NE WINCHESTER TL, Cheshire, NH
Built 1862 Load: 25.5 t ADT: 780
NH111A
FairOver: DUDLEY BROOK
.6 MI. FROM BRENTWOOD TL, Rockingham, NH
Built 1936 Load: 25.5 t ADT: 1,626
NO DATA ENTERED
FairOver: INDIGO SALE
NO DATA ENTERED, Grafton, NH
Built 2008 Load: 25.6 t ADT: 99
FDR 229
FairOver: MOOSILAUKE BROOK
MAP 29, Grafton, NH
Built 1979 Load: 25.6 t ADT: 50
JIM TOWN ROAD
FairOver: MOOSE BROOK
0.45 MI W JCT US 2, Coos, NH
Built 1975 Load: 25.7 t ADT: 604
NH 28A,MAMMOTH RD
FairOver: COHAS BROOK
1.3 MI N LONDONDERRY TL, Hillsborough, NH
Built 1935 Load: 25.7 t ADT: 11,711
ALLDS STREET
FairOver: SALMON BROOK
.2 MI E OF MAIN ST, Hillsborough, NH
Built 1892 Load: 25.7 t ADT: 8,913
MARKET STREET WB
FairOver: TIDAL BASIN
.5 MI E JCT I-95, Rockingham, NH
Built 1971 Load: 25.7 t ADT: 8,968
WADLEIGH HILL ROAD
FairOver: KEZAR LAKE OUTLET
0.17MI NH 114, Merrimack, NH
Built 1940 Load: 25.8 t ADT: 359
NH107
FairOver: LAMPREY RIVER
.4 MI S JCT RT 101, Rockingham, NH
Built 1962 Load: 25.8 t ADT: 13,430
NH 33
FairOver: CSX
.8 MI JCT I-95, Rockingham, NH
Built 1971 Load: 25.9 t ADT: 13,782
MADBURY ROAD
FairOver: CSX
.2 MI JCT RTE 4, Strafford, NH
Built 1980 Load: 25.9 t ADT: 4,618
MOUNTAIN ROAD
FairOver: ASHUELOT RIVER
0.45 MI. TL WASHINGTON, Sullivan, NH
Built 1936 Load: 25.9 t ADT: 1,214
NH116
FairOver: HAM BRANCH
2.01 MI S FRANCONIA T.L., Grafton, NH
Built 1932 Load: 26.1 t ADT: 404
MESSER STREET
FairOver: WINNIPESAUKEE RIVER
1.0 MI. JCT 106, Belknap, NH
Built 1980 Load: 26.3 t ADT: 5,460
CLIFFORD BROOK RD
FairOver: CLIFFORD BROOK
0.6 MI. JCT FISH HATCH RD, Grafton, NH
Built 1983 Load: 26.3 t ADT: 90
SAW MILL ROAD
FairOver: BEARDS BROOK
1.4 MI. RTE. 9, Hillsborough, NH
Built 1919 Load: 26.3 t ADT: 583
BROOK ROAD
FairOver: JACOBS BROOK
210 FT. RTE. 25A, Grafton, NH
Built 1930 Load: 26.4 t ADT: 52
Showing 651-700 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.