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
MAIN STREET
FairOver: SUGAR RIVER
115 FT FROM GARNETT ST, Sullivan, NH
Built 1920 Load: 42.6 t ADT: 2,144
FDR 12
FairOver: BLUE BROOK
MAP 14, Coos, NH
Built 1947 Load: 42.8 t ADT: 50
US 3,FEE TPK NB
FairOver: NASHUA RIVER
0.3 MI FROM NH 130, Hillsborough, NH
Built 1955 Load: 42.8 t ADT: 71,603
GOLDMINE ROAD
FairOver: STANLEY BROOK
TOWN RD., Cheshire, NH
Built 1985 Load: 42.9 t ADT: 370
NH 16TRK, UNITY ST
FairOver: ANDROSCOGGIN RIVER
120FT FROM RTE 16, Coos, NH
Built 1982 Load: 43.3 t ADT: 3,983
NH 12A
FairOver: BLOOD BROOK
.4 MI. FROM PLAINFIELD TL, Grafton, NH
Built 1954 Load: 43.3 t ADT: 3,516
CHAPEL ROAD
FairOver: LOVELL RIVER
0.5 MI FR OSSIPEE RD, Carroll, NH
Built 1940 Load: 43.5 t ADT: 90
I-93 SB
FairOver: OWL STREET
0.7 MI THORNTON TL, Grafton, NH
Built 1968 Load: 43.5 t ADT: 7,500
I-93 PARKWAY
FairOver: TRAM ACCESS ROAD
2.2 MI. N. LINCOLN T.L., Grafton, NH
Built 1986 Load: 43.5 t ADT: 11,427
NH 16,SP TPK
FairOver: LONG HILL ROAD
1.5 MI. ROCHESTER TL., Strafford, NH
Built 1956 Load: 43.5 t ADT: 29,795
I-93 PARKWAY NB
FairOver: TRAIL,PEMIGEWASSET RIVER
5.0 MI NO WOODSTOCK TL, Grafton, NH
Built 1985 Load: 43.6 t ADT: 5,723
TRIPOLI ROAD
FairOver: MAD RIVER
.29 MI. FROM JCT. RTE. 49, Grafton, NH
Built 1968 Load: 43.7 t ADT: 409
NH136
FairOver: OTTER BROOK
1.9 MI E GREENFIELD TL, Hillsborough, NH
Built 1968 Load: 43.8 t ADT: 2,481
I-93 NB
FairOver: US 3
0.2 MI CAMPTON TL, Grafton, NH
Built 1968 Load: 43.9 t ADT: 7,928
I-89,NH 10
FairOver: BROOK,ATV TRAIL
0.4MI S LEBANON T/L, Grafton, NH
Built 1959 Load: 44.0 t ADT: 24,571
JEFFERSON NOTCH RD
FairOver: S BRANCH ISRAEL RIVER
1.5 MI S JEFFERSON TL, Coos, NH
Built 1990 Load: 44.5 t ADT: 90
BLACKWATER ROAD
FairOver: CRYSTAL LAKE BROOK
0.8 MI FROM ENFIELD TL, Grafton, NH
Built 1988 Load: 44.5 t ADT: 470
BOSTON POST ROAD
FairOver: BEAVER BROOK
1.6 MI MONT VERNON TL, Hillsborough, NH
Built 1970 Load: 44.5 t ADT: 2,458
NH 28,S WILLOW ST
FairOver: COHAS BROOK
1.2 MI N LONDONDERRY TL, Hillsborough, NH
Built 1989 Load: 44.5 t ADT: 15,874
HILLDALE LANE
FairOver: S BR PISCATAQUOG RIVER
0.07 MI FR RIVER RD, Hillsborough, NH
Built 1920 Load: 44.5 t ADT: 90
TREMONT STREET
FairOver: CONTOOCOOK RIVER
CONCORD TL, Merrimack, NH
Built 1955 Load: 44.7 t ADT: 5,247
NH 97
FairOver: SPICKET RIVER
.5MI W MASS SL, Rockingham, NH
Built 1958 Load: 44.9 t ADT: 15,781
JEFFERSON NOTCH RD
FairOver: S BRANCH ISRAEL RIVER
1.1 M S JEFFERSON TL, Coos, NH
Built 1939 Load: 45.3 t ADT: 90
GUILDHALL ROAD
FairOver: CONNECTICUT RIVER
VERMONT STATE LINE, Coos, NH
Built 1984 Load: 45.3 t ADT: 807
NH 63
FairOver: ASHUELOT RIVER
0.1 MI FROM JCT 119 & 63, Cheshire, NH
Built 1940 Load: 45.4 t ADT: 1,908
I-93 PARKWAY
FairOver: BIKE PATH, LAFAYETTE BK
3.3 MI N. LINCOLN TL, Grafton, NH
Built 1987 Load: 45.4 t ADT: 10,069
US 3,FEE TPK NB
FairOver: CANAL,SERVICE ROAD
0.5 MI FROM NH 130, Hillsborough, NH
Built 1955 Load: 45.4 t ADT: 57,702
I-93,FEE TPK NB
FairOver: CSX
.2MINJCT RT3-A, Merrimack, NH
Built 1957 Load: 45.4 t ADT: 41,887
BLACK HALL ROAD
FairOver: LITTLE SUNCOOK RIVER
.09 MI SW JCT US4, Merrimack, NH
Built 1924 Load: 45.5 t ADT: 2,085
COTTON ROAD
FairOver: LAMPREY RIVER
0.05 MI. RTE 107, Rockingham, NH
Built 1986 Load: 45.5 t ADT: 745
US 4
FairOver: NH155A
.5 MI. FROM LEE T.L., Strafford, NH
Built 1968 Load: 45.5 t ADT: 13,086
SOUTH RIVER ROAD
FairOver: GREAT BROOK
1.4 MI FR WESTMORELAND T, Cheshire, NH
Built 1950 Load: 45.7 t ADT: 119
US 4
FairOver: HUPPE BROOK
0.08 MI. FROM ENFIELD TL, Grafton, NH
Built 1945 Load: 45.7 t ADT: 10,800
PARKER ROAD
FairOver: S BR PISCATAQUOG RIVER
177 FT FR RIVER ROAD, Hillsborough, NH
Built 1937 Load: 45.7 t ADT: 1,174
MAIN STREET
FairOver: CSX,PEDESTRIAN
1.6 MI SE LEE T.L., Strafford, NH
Built 1936 Load: 45.9 t ADT: 7,598
NH123
FairOver: BAILEY BROOK
0.4 MI SE NELSON TL, Cheshire, NH
Built 1939 Load: 46.2 t ADT: 1,331
NO DATA ENTERED
FairOver: AMMONOOSUC RIVER
MAP 10, Grafton, NH
Built 2006 Load: 46.3 t ADT: 100
I-89 SB
FairOver: CONTOOCOOK RIVER
1.2 MI N.W. JCT RT 127, Merrimack, NH
Built 1959 Load: 46.5 t ADT: 11,347
NH286
FairOver: BLACKWATER RIVER
.1 MI JCT RT 1-A, Rockingham, NH
Built 1991 Load: 46.5 t ADT: 13,388
QUAKER WHITEFACE R
FairOver: WHITEFACE RIVER
0.45 MI. RTE. 113A, Carroll, NH
Built 1953 Load: 46.7 t ADT: 90
BORDEAU ROAD
FairOver: STRATFORD BOG BROOK
3.1 MI. US3, Coos, NH
Built 1970 Load: 46.7 t ADT: 90
NH 16
FairOver: CLAY BROOK
0.7 MI NE MARTINS LOC., Coos, NH
Built 1932 Load: 46.9 t ADT: 5,025
NH 12
FairOver: MILL BROOK
3.5 MI TO WALPOLE TL, Cheshire, NH
Built 1928 Load: 47.0 t ADT: 6,382
NH 11,NH103
FairOver: SUGAR RIVER,PED TRAIL
2.2 MI FROM CLAREMONT TL, Sullivan, NH
Built 1998 Load: 47.0 t ADT: 9,812
ROBINSON ROAD
FairOver: MOOSE BROOK
3.2 MI FROM GREENFIELD T, Hillsborough, NH
Built 1990 Load: 47.2 t ADT: 21
US 1
FairOver: TAYLOR RIVER
0.1 MI HAMPTON FALLS TL, Rockingham, NH
Built 1965 Load: 47.2 t ADT: 20,578
MARLOW ROAD
FairOver: ASHUELOT RIVER
TOWN RD 0.54 MI MARLOW TL, Sullivan, NH
Built 1920 Load: 47.4 t ADT: 64
US302
FairOver: ELLIS RIVER
0.20mi west of jct. NH16, Carroll, NH
Built 1998 Load: 47.7 t ADT: 6,003
US 4
FairOver: INDIAN RIVER
5.7 MI FROM ENFIELD TL, Grafton, NH
Built 1942 Load: 47.7 t ADT: 2,550
BOY'S CAMP ROAD
FairOver: BICKNELL BROOK
.9 MI FR NH RTE 4A, Grafton, NH
Built 1947 Load: 47.7 t ADT: 90
Showing 1,101-1,150 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.