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Browse Bridge Database

2,549 bridges in the FHWA National Bridge Inventory in New Hampshire.

National Bridge Inventory Database

Browse 2,549 bridges from the Federal Highway Administration National Bridge Inventory. Filter by state, condition rating, or search by name and location.

Clear
BridgeLocationConditionYear BuiltLengthADT
OYSTER RIVER New Hampshire Fair 1929 7.3 m 18,654
CONTOOCOOK RIVER New Hampshire Good 2024 56.7 m 18,622
PLAZA CONNECTOR ROAD New Hampshire Good 2012 17.5 m 18,618
NH 12A New Hampshire Good 2012 48.2 m 18,618
WINNIPESAUKEE RIVER New Hampshire Fair 1970 110.3 m 18,507
I-89 RAMP New Hampshire Good 1959 45.1 m 18,311
I-95 New Hampshire Fair 1971 86.9 m 18,255
COCHECO RIVER New Hampshire Good 2012 44.3 m 18,254
NH132 New Hampshire Good 1959 50.3 m 18,247
DANIEL WEBSTER HWY New Hampshire Fair 1993 39.0 m 18,109
FEE TPK New Hampshire Good 1989 54.3 m 17,949
MAPLE ST NHRR New Hampshire Good 1947 53.3 m 17,943
NH132 New Hampshire Fair 1959 56.4 m 17,906
BRANCH RIVER New Hampshire Good 1994 35.7 m 17,831
BEAVER BROOK New Hampshire Good 2019 8.5 m 17,831
MERRIMACK RIVER CSX RD New Hampshire Fair 1970 261.5 m 17,799
WINNICUT RIVER New Hampshire Poor 1959 19.8 m 17,736
LAMPREY RIVER New Hampshire Good 1991 33.2 m 17,674
OSGOOD ROAD New Hampshire Fair 1977 21.3 m 17,533
PERRY ROAD New Hampshire Fair 1978 21.3 m 17,533
US 3 New Hampshire Good 2011 43.9 m 17,401
MERRIMACK RIVER New Hampshire Fair 1970 183.5 m 17,275
I-93 SB OFF RAMP New Hampshire Fair 1961 21.6 m 17,124
BRIDGE STREET New Hampshire Fair 1961 18.3 m 17,124
HATFIELD ROAD New Hampshire Fair 1961 34.4 m 17,117
CONTOOCOOK RIVER New Hampshire Fair 1961 95.7 m 17,117
ELM BROOK New Hampshire Fair 1961 96.0 m 17,117
SUNCOOK RIVER OVERFLOW New Hampshire Good 1996 30.8 m 17,061
SUNCOOK RIVER New Hampshire Good 1971 25.6 m 17,061
WETLAND 41 New Hampshire Good 2007 20.1 m 17,028
HARRIS RD FLATROCK BK New Hampshire Good 2007 183.2 m 17,014
COHAS BROOK New Hampshire Fair 1986 10.7 m 16,980
PORTSMOUTH STREET New Hampshire Good 1978 39.9 m 16,864
NORTH RIVER New Hampshire Good 1977 12.8 m 16,805
NASHUA RIVER New Hampshire Fair 1925 48.2 m 16,730
HEATER ROAD New Hampshire Fair 1966 56.7 m 16,677
HARDY HILL ROAD New Hampshire Good 1966 14.5 m 16,677
NHRR(ABD) New Hampshire Good 1966 44.8 m 16,677
MASCOMA R RIVERSIDE DR New Hampshire Good 1966 93.6 m 16,677
LYMAN BROOK New Hampshire Fair 1980 95.1 m 16,645
BETTS ROAD New Hampshire Good 1978 29.3 m 16,645
CROSS ROAD New Hampshire Fair 1978 29.3 m 16,645
MCKEAGHNEY ROAD New Hampshire Good 1978 21.9 m 16,645
ASHUELOT RIVER New Hampshire Fair 1952 29.9 m 16,605
CSX New Hampshire Fair 1936 54.9 m 16,562
CSX New Hampshire Fair 1936 46.0 m 16,562
NHNCRR New Hampshire Fair 1957 43.0 m 16,502
NH125 New Hampshire Good 1957 44.5 m 16,502
AXE HANDLE BROOK New Hampshire Good 1983 7.6 m 16,489
COCHECO RIVER New Hampshire Fair 1931 16.2 m 16,489

Frequently Asked Questions

The National Bridge Inventory (NBI) is a federal database maintained by the Federal Highway Administration containing inspection data for all bridges on public roads in the U.S. with a span of more than 20 feet. Bridge owners must inspect each structure at least every 24 months.

ADT stands for Average Daily Traffic — the average number of vehicles crossing the bridge per day. Bridges are sorted by ADT by default because high-traffic bridges in poor condition pose the greatest risk to the most people.

Yes. Use the search field above to find bridges by name, location, or features crossed. You can also combine the search with state and condition filters to narrow your results.