Total Bridges
2,542
Public highway bridges in New Hampshire
State profile · Near national median SD
New Hampshire bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in New Hampshire — drawn straight from the FHWA National Bridge Inventory.
- 2,542
- Public bridges
- 43.0%
- Good condition
- 7.1%
- Poor condition
- 7.1%
- Structurally deficient
Good Condition
43.0%
1,092 bridges rated 7-9
-7.0pp vs 50% benchmark
Poor Condition
7.1%
180 bridges rated 0-4
Structurally Deficient
7.1%
180 bridges flagged for repair priority
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 — Structurally deficient share 23.6%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
Bridge inventory deck-condition mix — New Hampshire (FHWA NBI)
New Hampshire vs nearby ranks
Adjacent states on the structurally deficient leaderboard (lower share = better)
States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below New Hampshire on the same metric.
36
New York
6.90% top marginal rate
21
Kentucky
7.06% top marginal rate
33
New Hampshire
7.08% top marginal rate
40
Oklahoma
7.50% top marginal rate
35
New Mexico
7.61% top marginal rate
Bridges Needing Most Attention in New Hampshire
Six lowest-condition bridges in New Hampshire, ranked by composite NBI rating. Each is inspected at least every 24 months.
OLD DEERFIELD ROAD
PoorOver: BROOK
185 FT FROM NH RTE 43, Rockingham, NH
Built 1920 Load: 1.8 t ADT: 190
TEMPLETON TURNPIKE
Structurally DeficientOver: PRIEST BROOK
1.9MI. RTE 119, Cheshire, NH
Built 1984 Load: 2.7 t ADT: 86
DUDLEY ROAD
Structurally DeficientOver: LAMPREY RIVER
.23 MI JCT 101, Rockingham, NH
Built 1914 Load: 2.9 t ADT: 535
SHOP ROAD
Structurally DeficientOver: 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
Structurally DeficientOver: PHILLIPS BROOK
100 FT FR SULLIVAN RD 61, Coos, NH
Built 1940 Load: 3.6 t ADT: 90
All Bridges in New Hampshire
FLUME BUS ROUTE
FairOver: PEMIGEWASSET RIVER
THE FLUME, Grafton, NH
Built 1886 Load: 10.8 t ADT: 50
MAIN STREET
FairOver: LAMPREY RIVER
0.7 MI. RTE 125, Rockingham, NH
Built 1936 Load: 10.9 t ADT: 3,948
SAWYERS CROSSING
FairOver: ASHUELOT RIVER
1.71MI E JCT NH 10, Cheshire, NH
Built 1859 Load: 11.6 t ADT: 3,494
FOREST ROAD
FairOver: CONTOOCOOK RIVER
1.0 MI EAST OF RTE 202, Hillsborough, NH
Built 1937 Load: 12.4 t ADT: 2,776
NARROWS ROAD
FairOver: SUNCOOK LAKE CHANNEL
0.4 MI FR WHITE OAK RD, Belknap, NH
Built 1960 Load: 12.7 t ADT: 346
NH123
FairOver: COLD RIVER
.22 MI SE LANGDON TL, Cheshire, NH
Built 1919 Load: 12.7 t ADT: 2,763
CHEMICAL ROAD
FairOver: WARNER RIVER
0.2 MI FROM JOPPA ROAD, Merrimack, NH
Built 1966 Load: 12.7 t ADT: 84
BENNETT ROAD
FairOver: CSX
0.9MI. RTE 108, Strafford, NH
Built 1910 Load: 12.7 t ADT: 642
DEPOT ROAD
FairOver: SUNCOOK RIVER
0.07 MI FR NH RTE 126, Belknap, NH
Built 1950 Load: 13.6 t ADT: 90
WINTER STREET
FairOver: SQUAM RIVER
0.2 MI FR NH RTE 25, Grafton, NH
Built 1941 Load: 13.6 t ADT: 1,014
MILLBROOK ROAD
FairOver: MILL BROOK
0.9MI. ORANGE TL, Grafton, NH
Built 2005 Load: 13.6 t ADT: 90
LOWER RIDGE ROAD
FairOver: ACADEMY BROOK
1.6 MI FR NH 106, Merrimack, NH
Built 1931 Load: 13.6 t ADT: 618
SOUTH ROAD
FairOver: S BR ASHUELOT RIVER
.12MI JCT NH 32, Cheshire, NH
Built 1936 Load: 14.3 t ADT: 1,106
NO DATA ENTERED
FairOver: BUNGA JAR
NO DATA ENTERED, Grafton, NH
Built 2007 Load: 14.3 t ADT: 50
BREEZY HILL ROAD
FairOver: POND BROOK
.9 MI FROM WARNER TL, Merrimack, NH
Built 1950 Load: 14.3 t ADT: 337
MAPLE STREET
FairOver: COLD BROOK
2.2 MI NE EFFINGHAM TL, Carroll, NH
Built 1922 Load: 14.5 t ADT: 250
OSSIPEE MT ROAD
FairOver: LOVELL RIVER
0.12 MI FR PINE HILL RD, Carroll, NH
Built 1951 Load: 14.5 t ADT: 90
UPPER ROAD
FairOver: BEARCAMP RIVER
2.1 MI FROM NH RTE 113, Carroll, NH
Built 1950 Load: 14.5 t ADT: 90
DIAMOND POND ROAD
FairOver: MOHAWK RIVER
0.14 MI NE JCT NH 26, Coos, NH
Built 1929 Load: 14.5 t ADT: 496
NORTH GROTON ROAD
FairOver: SMALL BROOK
2.4 MI FROM HEBRON TL, Grafton, NH
Built 1927 Load: 14.5 t ADT: 170
STINSON LAKE ROAD
FairOver: STINSON BROOK
1.6 MI S OF ELLSWORTH TL, Grafton, NH
Built 1927 Load: 14.5 t ADT: 840
DEER MEADOW ROAD
FairOver: DEER MEADOW BROOK
1.90MI CONCORD TL, Merrimack, NH
Built 1935 Load: 14.5 t ADT: 558
CORBIN BRIDGE ROAD
FairOver: CROYDON BRANCH SUGAR R
.69 MI JCT NH 10, Sullivan, NH
Built 1845 Load: 14.5 t ADT: 529
DANIELS ROAD
FairOver: OLIVERIAN BROOK
140 FT FR NH RTE 25, Grafton, NH
Built 1978 Load: 14.9 t ADT: 90
NO DATA ENTERED
FairOver: TUNNEL STREAM SALE
NO DATA ENTERED, Grafton, NH
Built 2015 Load: 14.9 t ADT: 99
VALLEY CROSS ROAD
FairOver: WILDCAT BROOK
0.04MI RTE 16B, Carroll, NH
Built 1905 Load: 15.0 t ADT: 192
HARTSHORN ROAD
FairOver: CROOKED RUN BROOK
.6 MILES W OF GRAY RD., Belknap, NH
Built 2003 Load: 15.1 t ADT: 90
RUDDSBORO ROAD
FairOver: MINK BROOK
4.4 MI FR LEBANON TL, Grafton, NH
Built 1946 Load: 15.1 t ADT: 90
US302,NH 10
FairOver: AMMONOOSUC RIVER
2.9 MI LANDAFF TL, Grafton, NH
Built 1980 Load: 15.1 t ADT: 5,186
NH101
FairOver: BLOOD BROOK
2.32 MI. E. PETERBORO TL, Hillsborough, NH
Built 1931 Load: 15.1 t ADT: 6,845
CHASE ROAD
FairOver: ORE HILL BROOK
O.1 MI WEST NH 25, Grafton, NH
Built 1950 Load: 15.2 t ADT: 90
WHITEFACE INTERVAL
FairOver: WHITEFACE RIVER
0.4 MI FR BENNETT ST, Carroll, NH
Built 1950 Load: 15.4 t ADT: 78
ANTRIM ROAD
FairOver: CONTOOCOOK RIVER
0.05 MI FR CONTOOCOOK VA, Hillsborough, NH
Built 1929 Load: 15.4 t ADT: 2,291
HIGHLAND AVENUE
FairOver: BEAVER BROOK
0.7 MI. NH 28, Rockingham, NH
Built 1935 Load: 15.4 t ADT: 745
US 3
FairOver: CONNECTICUT RIVER
PITTSBURG TL, Coos, NH
Built 1931 Load: 15.5 t ADT: 1,406
LAING ROAD
FairOver: WARNER RIVER
60 FT FROM NH RTE 103, Merrimack, NH
Built 1980 Load: 15.9 t ADT: 90
NH116
FairOver: CLARK BROOK
.06 MI JCT 10, Grafton, NH
Built 1961 Load: 16.1 t ADT: 3,639
US 3 BUS,NH107
FairOver: JEWETT BROOK
1.7 MI N. BELMONT T.L., Belknap, NH
Built 1979 Load: 16.3 t ADT: 10,392
NH113
FairOver: CHARLES BROOK
2.0 MI S OF MAINE SL, Carroll, NH
Built 1938 Load: 16.3 t ADT: 343
MIDDLE ROAD
FairOver: BEARCAMP RIVER
0.6 MI FROM NH RTE 113, Carroll, NH
Built 1960 Load: 16.3 t ADT: 90
NH109
FairOver: WILLEY BROOK
0.8 MI Wentworth StatePrk, Carroll, NH
Built 1922 Load: 16.3 t ADT: 2,249
ROXBURY ROAD
FairOver: OTTER BROOK
ROXBURY TL, Cheshire, NH
Built 1950 Load: 16.3 t ADT: 1,562
OLD ROXBURY ROAD
FairOver: MINNEWAWA BROOK
0.6 MI. RTE. 101, Cheshire, NH
Built 1952 Load: 16.3 t ADT: 90
PARTRIDGE BROOK RD
FairOver: PARTRIDGE BROOK
1.2MI NH 63, Cheshire, NH
Built 1930 Load: 16.3 t ADT: 255
HATT ROAD
FairOver: PARTRIDGE BROOK
1.51 MI. NH63, Cheshire, NH
Built 1932 Load: 16.3 t ADT: 75
PINE WOODS ROAD
FairOver: MIREY BROOK
0.17 MI FR NH RTE119, Cheshire, NH
Built 1920 Load: 16.3 t ADT: 90
JEFFERSON NOTCH RD
FairOver: CLAY BROOK
4.7 MI RT 302, Coos, NH
Built 1973 Load: 16.3 t ADT: 90
HOLLOW ROAD
FairOver: STRATFORD BOG BROOK
0.5 MI EAST US 3, Coos, NH
Built 1924 Load: 16.3 t ADT: 34
DOW AVENUE
FairOver: GALE RIVER
0.5 MI. RTE 116, Grafton, NH
Built 1910 Load: 16.3 t ADT: 208
RIDDLE HILL ROAD
FairOver: SMITH RIVER
0.17MI. RTE 4, Grafton, NH
Built 1977 Load: 16.3 t ADT: 139
Showing 401-450 of 2,542 bridges
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.
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). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.
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.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |