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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
BROOK New Hampshire Good 1984 11.3 m 157
AMMONOOSUC RAIL TRAIL New Hampshire Good 2018 10.5 m 156
CLAY BROOK New Hampshire Fair 1885 45.4 m 154
COLD RIVER New Hampshire Fair 1974 22.9 m 153
BROOK New Hampshire Fair 1940 7.6 m 153
WILDCAT BROOK New Hampshire Fair 1964 13.7 m 153
WILDCAT BROOK New Hampshire Fair 1905 22.3 m 151
UPPER AMMONOOSUC RIVER New Hampshire Good 2000 39.7 m 149
MILL BROOK New Hampshire Fair 1950 7.3 m 149
CONTOOCOOK RIVER New Hampshire Fair 1915 36.3 m 147
MAD RIVER New Hampshire Fair 1950 20.1 m 147
BROOK New Hampshire Good 1940 14.0 m 146
S BRANCH BAKER RIVER New Hampshire Fair 1949 24.4 m 144
MILL BROOK New Hampshire Good 1985 12.2 m 143
BLOW-ME-DOWN BROOK New Hampshire Fair 1981 7.3 m 143
SMITH RIVER New Hampshire Fair 1949 22.9 m 142
SMITH RIVER New Hampshire Fair 1977 7.6 m 142
CHOCORUA RIVER New Hampshire Good 1986 6.7 m 140
ASHUELOT RIVER New Hampshire Fair 1981 29.6 m 137
BLOODS BROOK New Hampshire Fair 1880 25.0 m 137
SQUAM LAKE CHANNEL New Hampshire Good 2010 8.5 m 136
GREAT BROOK New Hampshire Fair 1981 17.4 m 132
BLOW-ME-DOWN BROOK New Hampshire Fair 1975 7.3 m 132
SMITH RIVER New Hampshire Fair 1937 32.9 m 130
I-93 New Hampshire Fair 1963 91.4 m 129
MILL BROOK New Hampshire Good 1969 14.6 m 126
BAKER RIVER New Hampshire Fair 1976 28.7 m 125
OTTER POND OUTLET New Hampshire Fair 1920 8.4 m 125
GRANITE LAKE OUTLET New Hampshire Good 1932 10.1 m 124
GRANITE LAKE OUTLET New Hampshire Good 1932 10.1 m 124
GRANITE LAKE OUTLET New Hampshire Good 1932 10.1 m 124
I-93 New Hampshire Good 1959 74.4 m 121
GREAT BROOK New Hampshire Fair 1950 10.7 m 121
RAND BROOK New Hampshire Good 2011 16.2 m 121
ORANGE BROOK New Hampshire Fair 1995 11.3 m 120
MILL BROOK New Hampshire Fair 1922 7.9 m 118
HOUGHTON BROOK New Hampshire Fair 1980 6.4 m 117
ALDRICH BROOK New Hampshire Good 2014 15.5 m 117
STRATFORD BOG BROOK New Hampshire Good 1984 16.5 m 117
BELLAMY RIVER New Hampshire Good 2022 11.6 m 116
MILL BROOK New Hampshire Fair 1928 7.6 m 113
BLOW-ME-DOWN-BROOK New Hampshire Poor 1950 7.0 m 112
NEEDLE SHOP BROOK New Hampshire Good 1960 7.6 m 112
BLAKE BROOK New Hampshire Good 1999 7.3 m 111
MAD RIVER New Hampshire Poor 1986 10.7 m 110
MINNEWAWA BROOK New Hampshire Fair 1943 13.4 m 110
S BR PISCATAQUOG RIVER New Hampshire Fair 1993 20.4 m 109
MEADOW BROOK New Hampshire Poor 1930 7.3 m 108
FERGUSON BROOK New Hampshire Fair 1995 6.7 m 107
GREAT BROOK New Hampshire Poor 1936 11.6 m 107

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.