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
BREEZY POINT ROAD
FairOver: BAKER RIVER
0.01MI NH 118, Grafton, NH
Built 1930 Load: 18.1 t ADT: 162
ROADWAY
FairOver: ZEALAND RIVER
MAP 10, Grafton, NH
Built 1935 Load: 18.1 t ADT: 50
COOLEDGE ROAD
FairOver: SHEDD BROOK
1.2 MI. RTE. 31, Hillsborough, NH
Built 1956 Load: 18.1 t ADT: 343
E WASHINGTON ROAD
FairOver: BROOK
2.0 MI. WASHINGTON TL, Hillsborough, NH
Built 1953 Load: 18.1 t ADT: 215
WHITTEN ROAD
FairOver: TUCKER BROOK
1/4 MILE S OF SAVAGE RD, Hillsborough, NH
Built 1988 Load: 18.1 t ADT: 1,690
PURGATORY ROAD
FairOver: PURGATORY BROOK
0.2 MI FR LYNDEBOROUGH T, Hillsborough, NH
Built 1970 Load: 18.1 t ADT: 1,916
CEDAR ROAD
FairOver: CSX
0.18 MI FR LAFAYETTE RD, Rockingham, NH
Built 1920 Load: 18.1 t ADT: 2,088
MCCRILLIS ROAD
FairOver: NORTH RIVER
0.6 MI. RTE.152, Rockingham, NH
Built 1963 Load: 18.1 t ADT: 910
LUND ROAD
FairOver: SALMON BROOK
.1 MI W OF E DUNSTABLE RD, Hillsborough, NH
Built 1950 Load: 18.3 t ADT: 7,433
PINKHAM B ROAD
FairOver: BUMPUS BROOK
0.46 MI SE JCT US 2, Coos, NH
Built 1945 Load: 18.6 t ADT: 86
SOUTH VILLAGE ROAD
FairOver: SOUCOOK RIVER
2.6 MI FROM CONCORD TL, Merrimack, NH
Built 1926 Load: 18.6 t ADT: 3,594
OXBOW ROAD
FairOver: SUNCOOK RIVER
0.8 MI FR NH 28, Belknap, NH
Built 1924 Load: 18.8 t ADT: 90
TANDY BROOK ROAD
FairOver: MILL BROOK
2.1 MI FR CLAREMONT TL, Sullivan, NH
Built 1955 Load: 18.8 t ADT: 90
MCINDOES STREET
FairOver: CONNECTICUT RIVER
VERMONT STATE LINE, Grafton, NH
Built 1930 Load: 19.0 t ADT: 435
WEST BRANCH ROAD
FairOver: MAD RIVER
0.18 MI FROM NH RTE 49, Grafton, NH
Built 1950 Load: 19.1 t ADT: 145
NH112
FairOver: GORDON POND BROOK
0.3 MI WEST OF JCT RTE 3, Grafton, NH
Built 1940 Load: 19.1 t ADT: 2,740
US 3,NH 11
FairOver: WINNIPESAUKEE RIVER
5.2MI FROM FRANKLIN T.L., Merrimack, NH
Built 1940 Load: 19.1 t ADT: 13,926
COTTON ROAD
FairOver: BAKER BROOK
0.9 MI FROM SHAKER ST #8, Merrimack, NH
Built 1945 Load: 19.1 t ADT: 90
ISLAND STREET
FairOver: ASHUELOT RIVER
DOWNTOWN KEENE, Cheshire, NH
Built 1979 Load: 19.2 t ADT: 5,953
ELLSWORTH HILL RD
FairOver: POND BROOK
0.11 MI NH25, Grafton, NH
Built 1930 Load: 19.2 t ADT: 103
POOR FARM ROAD
FairOver: S BR PISCATAQUOG RIVER
0.8MI. RTE 136, Hillsborough, NH
Built 2004 Load: 19.2 t ADT: 172
DANIEL WEBSTER HWY
FairOver: NASHUA RIVER
0.02 MI FROM PEARSON AVE, Hillsborough, NH
Built 1925 Load: 19.2 t ADT: 16,408
NH 31
FairOver: ASHUELOT RIVER
1.85 MI. S. GOSHEN TL, Sullivan, NH
Built 1935 Load: 19.2 t ADT: 487
HADLEY ROAD
FairOver: CONTOOCOOK RIVER
0.9MI. TL PETERBORO, Cheshire, NH
Built 1939 Load: 19.4 t ADT: 67
LEWIS ROAD
FairOver: ASHUELOT RIVER
50 FT JCT NH 10, Cheshire, NH
Built 1960 Load: 19.4 t ADT: 90
MASON ROAD
FairOver: NISSITISSIT RIVER
.49 MI NW JCT 13, Hillsborough, NH
Built 1932 Load: 19.4 t ADT: 3,105
NH175
FairOver: MAD RIVER
6.6 MI N JCT US 3, Grafton, NH
Built 1927 Load: 19.8 t ADT: 1,912
NH149
FairOver: CONTOOCOOK RIVER
.1 MI. FROM JCT. US 202, Hillsborough, NH
Built 1893 Load: 19.8 t ADT: 4,440
NH 77 TRUCK ROUTE
FairOver: PISCATAQUOG RIVER
0.02 MI S JCT NH 77, Hillsborough, NH
Built 1940 Load: 19.8 t ADT: 3,283
NH 31
FairOver: STONY BROOK
0.4 MI FROM JCT RTE 101, Hillsborough, NH
Built 1905 Load: 19.8 t ADT: 2,840
FOWLERS MILL ROAD
FairOver: SWIFT RIVER
0.13 MI. RTE.113A, Carroll, NH
Built 1920 Load: 20.0 t ADT: 90
SODOM ROAD
FairOver: MELVIN RIVER
1.5 MI. RTE. 109A, Carroll, NH
Built 1970 Load: 20.0 t ADT: 526
SURRY RD
FairOver: ASHUELOT RIVER
2.52 MI E SURRY TL, Cheshire, NH
Built 1863 Load: 20.0 t ADT: 1,214
LARCOMB ROAD
FairOver: ISRAEL RIVER
0.2 MI FR NH RTE 115, Coos, NH
Built 1975 Load: 20.0 t ADT: 90
US 3
FairOver: CONNECTICUT RIVER
17.4 MI E OF ROUTE 145, Coos, NH
Built 1961 Load: 20.0 t ADT: 217
DELAGE FARM ROAD
FairOver: HAM BRANCH
0.43 MI. RTE 116, Grafton, NH
Built 2001 Load: 20.0 t ADT: 90
STINSON LAKE ROAD
FairOver: STINSON BROOK
1.8 MI JCT 25, Grafton, NH
Built 1955 Load: 20.0 t ADT: 840
CROSS ROAD
FairOver: S BR PISCATAQUOG RIVER
TOWN RD, Hillsborough, NH
Built 1930 Load: 20.0 t ADT: 90
LINK ROAD
FairOver: FERGUSON BROOK
0.3 MI FR NH RTE 123, Hillsborough, NH
Built 1995 Load: 20.0 t ADT: 105
CURRIER ROAD
FairOver: SOUCOOK RIVER
0.6 MI FR OLD NH 106, Merrimack, NH
Built 1930 Load: 20.0 t ADT: 90
TYLER ROAD
FairOver: BLACKWATER RIVER
3.0 MI N OF HOPKINTON TL, Merrimack, NH
Built 1951 Load: 20.0 t ADT: 270
PIERCES ISLAND RD
FairOver: LITTLE HARBOR
200 FT FROM MECHANIC ST, Rockingham, NH
Built 1958 Load: 20.0 t ADT: 1,243
COLD POND ROAD
FairOver: LITTLE SUGAR RIVER
2.3 MI. ACWORTH TL, Sullivan, NH
Built 1930 Load: 20.0 t ADT: 339
ROADWAY
FairOver: DECEPTION BROOK
MAP 11, Coos, NH
Built 1949 Load: 20.1 t ADT: 100
FDR 22
FairOver: TRIB. HUBBARD BROOK
MAP 36, Grafton, NH
Built 1966 Load: 20.1 t ADT: 99
DIAMOND POND ROAD
FairOver: E BRANCH MOHAWK RIVER
0.83 N JCT RT 26, Coos, NH
Built 1930 Load: 20.2 t ADT: 90
VALLEY ROAD
FairOver: REC TRAIL(RR BED)
0.2 MI NH 11, Merrimack, NH
Built 1930 Load: 20.2 t ADT: 90
PATTERSON HILL RD
FairOver: CONTOOCOOK RIVER
3.6 MI FR DEERING TL, Merrimack, NH
Built 1915 Load: 20.2 t ADT: 145
NH103,NH127
FairOver: CONTOOCOOK RIVER
1.6 MI S WARNER TL, Merrimack, NH
Built 1935 Load: 20.2 t ADT: 6,814
FDR 38
FairOver: SLIPPERY BROOK
MAP 24, Carroll, NH
Built 1963 Load: 20.4 t ADT: 50
Showing 501-550 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.