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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
WILD AMMONOOSUC RIVER New Hampshire Good 1995 24.5 m 1,677
BLACK BROOK New Hampshire Good 2004 13.1 m 1,677
CLAY BROOK New Hampshire Fair 1932 7.0 m 1,677
LOST RIVER New Hampshire Fair 1957 19.8 m 1,677
BERRY BROOK New Hampshire Good 1986 11.0 m 1,673
BLACKWATER RIVER New Hampshire Fair 1967 31.7 m 1,664
DUDLEY BROOK New Hampshire Fair 1936 7.9 m 1,663
HOBBS BROOK New Hampshire Good 1990 7.6 m 1,660
SALMON FALLS RIVER New Hampshire Good 1983 25.6 m 1,654
KILBURN BROOK New Hampshire Fair 1936 7.3 m 1,643
MARTIN BROOK New Hampshire Good 1970 8.5 m 1,641
I-95 New Hampshire Good 1971 74.1 m 1,639
BAKER RIVER New Hampshire Good 1998 48.8 m 1,635
LAMPREY RIVER New Hampshire Fair 1923 22.9 m 1,630
CONWAY LAKE OUTLET New Hampshire Good 1940 13.4 m 1,629
UPPER AMMONOOSUC RIVER New Hampshire Fair 1970 37.5 m 1,619
PARTRIDGE BROOK New Hampshire Fair 1969 7.3 m 1,618
MILL BROOK New Hampshire Fair 1935 12.5 m 1,610
MOHAWK RIVER New Hampshire Fair 1929 15.2 m 1,600
BLACK BROOK New Hampshire Fair 1994 14.6 m 1,591
PERRY STREAM OVERFLOW New Hampshire Good 1996 8.5 m 1,586
PERRY STREAM New Hampshire Good 1996 25.8 m 1,586
OTTER BROOK New Hampshire Fair 1950 16.2 m 1,586
PEMIGEWASSET RIVER New Hampshire Fair 1869 87.8 m 1,584
WARNER RIVER New Hampshire Poor 1937 37.5 m 1,581
SQUAMSCOTT RIVER New Hampshire Good 1935 17.7 m 1,568
SQUAMSCOTT RIVER New Hampshire Good 1935 17.7 m 1,568
E BR PEMIGEWASSET RIVER New Hampshire Good 2016 89.8 m 1,555
BROOK New Hampshire Good 2024 30.3 m 1,550
NISSITISSIT RIVER New Hampshire Fair 1978 17.7 m 1,548
STOCKER BROOK New Hampshire Good 1941 13.9 m 1,542
STOCKER BROOK New Hampshire Good 1929 9.1 m 1,542
SUNCOOK RIVER New Hampshire Good 1950 39.3 m 1,540
SESSIONS BROOK New Hampshire Good 1926 6.7 m 1,529
S BR PISCATAQUOG RIVER New Hampshire Good 1967 7.9 m 1,523
HORNES BROOK New Hampshire Good 1998 11.0 m 1,519
CONNECTICUT RIVER New Hampshire Poor 1934 162.5 m 1,508
LITTLE RIVER New Hampshire Good 2010 6.7 m 1,496
PISCATAQUOG RIVER New Hampshire Good 1939 7.9 m 1,482
BLACKWATER RIVER New Hampshire Poor 1941 50.6 m 1,472
LAMPREY RIVER New Hampshire Fair 1933 41.5 m 1,470
INDIAN RIVER New Hampshire Poor 1948 10.7 m 1,436
INDIAN RIVER New Hampshire Fair 1950 14.3 m 1,436
OX BROOK New Hampshire Good 2002 8.5 m 1,429
LITTLE SUGAR RIVER New Hampshire Fair 1984 11.0 m 1,429
NECRR New Hampshire Good 2000 33.2 m 1,429
AMMONOOSUC RIVER New Hampshire Fair 1998 143.5 m 1,409
NHRR New Hampshire Fair 1924 7.6 m 1,398
MASCOMA RIVER New Hampshire Fair 1972 31.7 m 1,392
BLACK BROOK New Hampshire Poor 1994 12.8 m 1,387

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.