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
NH101 WB
UnknownOver: BRIDGE STREET
1.2 MI W JCT RTE 28 BYP, Hillsborough, NH
Built 1961 ADT: 2,600
I-93 NB
UnknownOver: BRIDGE STREET
1.2 MI W JCT NH 28 BYP, Hillsborough, NH
Built 1977 ADT: 2,600
NH101 EB
UnknownOver: BRIDGE STREET
1.2 MI W. JCT RTE 28 BYP, Hillsborough, NH
Built 1961 ADT: 2,600
I-93 SB,NH101 WB
UnknownOver: HANOVER STREET
1.8MI W JCT RTE 28 A, Hillsborough, NH
Built 1960 ADT: 13,000
I-93 NB,NH101 EB
UnknownOver: HANOVER STREET
1.8 MI W JCT RTE 28 A, Hillsborough, NH
Built 1960 ADT: 13,000
I-93 SB,NH101 WB
UnknownOver: CANDIA ROAD
2.2 MI W JCT RT 28 BYPASS, Hillsborough, NH
Built 1960 ADT: 13,000
I-93 NB,NH101 EB
UnknownOver: CANDIA ROAD
2.2 MI W JCT RT 28 BYP, Hillsborough, NH
Built 1960 ADT: 13,000
I-293,FEE TPK
UnknownOver: I-293 NB ON RAMP
.6 MI BEDFORD TL, Hillsborough, NH
Built 2016 ADT: 5,123
US 3,NH 3A
UnknownOver: I-293,NH 3A,CSX,MERR R
0.7 MI BEDFORD TL, Hillsborough, NH
Built 1923 ADT: 61,000
I-293 NB OFF RAMP
UnknownOver: I-293,NH 3A,FEE TPK
1.5 E JCT RT 28, Hillsborough, NH
Built 2016 ADT: 61,000
ISLAND POND ROAD
UnknownOver: I-93 SB,I-293 WB
.6 MI E JCT RTE 28A, Hillsborough, NH
Built 2009 ADT: 53,000
ISLAND POND ROAD
UnknownOver: I-93 NB,I-293 EB
.6 MI E RT 28 A, Hillsborough, NH
Built 2009 ADT: 53,000
I-93 SB
UnknownOver: I-293 EBN
1.4 MI E JCT NH 28, Hillsborough, NH
Built 1961 ADT: 55,000
I-293 WB,NH101 WB
UnknownOver: NH 28A
1 MI E JCT RTE 28, Hillsborough, NH
Built 1961 ADT: 10,000
I-293 EB,NH101 EB
UnknownOver: NH 28A
1.0 MI E JCT RT 28, Hillsborough, NH
Built 1961 ADT: 10,000
I-93 NB OFF RAMP
UnknownOver: I-293 EB,NH101 EB
.1 MI E JCT RTE .3, Hillsborough, NH
Built 1961 ADT: 55,000
NH 28
UnknownOver: I-293,NH101
1.8 MI N LONDONDERRY TL, Hillsborough, NH
Built 1960 ADT: 87,000
HUSE ROAD
UnknownOver: I-293,NH101
1.3 MI E JCT RTE 28, Hillsborough, NH
Built 1960 ADT: 83,000
I-93 SB
UnknownOver: I-93 NB OFF RAMP
1.5 MI E JCT RT 28, Hillsborough, NH
Built 1962 ADT: 27,500
I-293 WB,NH101
UnknownOver: FRONTAGE RD,CSX(ABD)
0.6 MI E JCT RTE 3A, Hillsborough, NH
Built 1958 ADT: 10,000
I-293 EB,NH101
UnknownOver: FRONTAGE RD,CSX(ABD)
0.6MI E JCT RTE 3A, Hillsborough, NH
Built 1958 ADT: 10,000
I-293 WB,NH101
UnknownOver: NH 3A,BROWN AVE
1.2MI W JCT RTE 28, Hillsborough, NH
Built 2004 ADT: 8,500
I-93 SB
UnknownOver: BODWELL ROAD
3.2 MI S.W JCT RT 28, Hillsborough, NH
Built 1962 ADT: 4,400
I-93 NB
UnknownOver: BODWELL ROAD
3.2 MI SW JCT RT28, Hillsborough, NH
Built 1962 ADT: 4,400
I-293 EB,NH101
UnknownOver: NH 3A,BROWN AVE
1.2MI W. JCT RTE 28, Hillsborough, NH
Built 2004 ADT: 8,500
BABOOSIC LAKE ROAD
UnknownOver: FEE TPK
.8 MI FROM SOUHEGAN R, Hillsborough, NH
Built 1954 ADT: 68,000
INDUSTRIAL DRIVE
UnknownOver: FEE TPK
1.0 MI.FR. NASHUA T/L, Hillsborough, NH
Built 1990 ADT: 68,000
FEE TPK
UnknownOver: GREELEY STREET
AT MERRIMACK INTERCHANGE, Hillsborough, NH
Built 1993 ADT: 16,000
WIRE ROAD
UnknownOver: FEE TPK
0.5 MI BABOOSIC ROAD, Hillsborough, NH
Built 1954 ADT: 69,000
BEDFORD ROAD
UnknownOver: FEE TPK
1.8 MI BEDFORD T.L., Hillsborough, NH
Built 1990 ADT: 69,000
NH101
UnknownOver: OSGOOD ROAD
1.0 MI W JCT NH 13., Hillsborough, NH
Built 1977 ADT: 4,000
NH101
UnknownOver: NH 13
1 MI S MILFORD VILLAGE, Hillsborough, NH
Built 1976 ADT: 5,000
NH101
UnknownOver: PONEMAH HILL ROAD
0.8 M W AMHERST T.L., Hillsborough, NH
Built 1971 ADT: 1,000
NH101
UnknownOver: NH101A,CSX
0.2 MI W. AMHERST T.L., Hillsborough, NH
Built 1971 ADT: 30,504
TINKER ROAD
UnknownOver: FEE TPK
0.9 MI S MERRIMACK T/L, Hillsborough, NH
Built 1987 ADT: 111,000
NH130,BROAD STREET
UnknownOver: US 3,FEE TPK
.2 MI FROM COLISEUM AVE, Hillsborough, NH
Built 1999 ADT: 124,280
NH101A BP,SOMERSET
UnknownOver: FEE TPK
1.3 MI FR MERRIMACK TL, Hillsborough, NH
Built 1989 ADT: 111,000
NH101A
UnknownOver: FEE TPK
0.01 MI CYPRESS LANE, Hillsborough, NH
Built 1999 ADT: 91,000
PINE HILL ROAD
UnknownOver: US 3,FEE TPK
.2 MI FROM NH 130, Hillsborough, NH
Built 1994 ADT: 111,000
NH111
UnknownOver: US 3,FEE TPK
0.02 MI FROM NH111-A, Hillsborough, NH
Built 1998 ADT: 106,000
BALDWIN STREET
UnknownOver: BROAD ST PKWY,CSX
0.18 MI FR FAIRMONT ST, Hillsborough, NH
Built 2014 ADT: 19,000
FAIRMOUNT STREET
UnknownOver: BROAD ST PKWY,CSX
60 FT FROM FIFIELD LANE, Hillsborough, NH
Built 2015 ADT: 19,000
EAST DUNSTABLE RD
UnknownOver: FEE TPK,RAMP 4CD
0.01 MI FROM SALMON BK, Hillsborough, NH
Built 1996 ADT: 106,000
WATER STREET
UnknownOver: FACTORY ACCESS ROAD
0.13 MI FR MAIN ST, Hillsborough, NH
Built 1962 ADT: 5,200
FEE TPK NB,RAMP 4
UnknownOver: RAMP 3B
.02 MI FROM ROBINSON RD, Hillsborough, NH
Built 1997 ADT: 5,000
DANIEL WEBSTER HWY
UnknownOver: US 3,FEE TPK NB RAMP
0.02 MI FROM ROBINSON RD, Hillsborough, NH
Built 1955 ADT: 11,000
FEE TPK SB ON RAMP
UnknownOver: FEE TPK SB OFF RAMP
1 MI N MASS SL, Hillsborough, NH
Built 1995 ADT: 6,000
FEE TPK SB,RAMP
UnknownOver: FEE TPK SB OFF RAMPS
1.2 MI N MASS SL, Hillsborough, NH
Built 1996 ADT: 11,444
US 3,FEE TPK SB
UnknownOver: SPIT BROOK ROAD
.5 MI FROM MASS S.L., Hillsborough, NH
Built 1995 ADT: 24,000
FEE TPK NB,ON RAMP
UnknownOver: FEE TPK SB OFF RAMPS
1.2 MI N MASS SL, Hillsborough, NH
Built 1996 ADT: 11,444
Showing 101-150 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.