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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
NORTH RIVER New Hampshire Poor 1925 7.0 m 3,719
NORTH RIVER New Hampshire Good 1970 9.5 m 3,719
CLARK BROOK New Hampshire Fair 1961 13.7 m 3,712
MERRIMACK RIVER New Hampshire Good 2016 124.1 m 3,708
NHNCRR New Hampshire Fair 1978 21.3 m 3,708
S BRANCH ASHUELOT RIVER New Hampshire Good 2002 39.4 m 3,707
NH 18 New Hampshire Good 1986 30.5 m 3,707
NHRR CONSTITUTION AV. New Hampshire Fair 1949 40.2 m 3,658
ASHUELOT RIVER New Hampshire Good 1962 59.1 m 3,648
I-93 NB I-293 EB New Hampshire Good 2009 42.7 m 3,640
SUNCOOK RIVER New Hampshire Good 2005 38.1 m 3,640
I-93 SB I-293 WB New Hampshire Good 2009 42.7 m 3,640
CONNECTICUT RIVER New Hampshire Fair 1937 132.2 m 3,625
CONNECTICUT RIVER New Hampshire Good 1976 204.8 m 3,621
NH135 New Hampshire Good 1982 28.7 m 3,621
CROYDON BRANCH SUGAR R New Hampshire Fair 1973 39.9 m 3,612
OSSIPEE RIVER New Hampshire Good 1956 73.7 m 3,594
WIDOW HARRIS BROOK New Hampshire Good 2020 10.7 m 3,592
SPICKET RIVER New Hampshire Good 2016 14.0 m 3,592
SOUHEGAN RIVER New Hampshire Good 1987 45.1 m 3,589
MAIN STREET CSX New Hampshire Good 2000 35.4 m 3,589
BLOOD BROOK New Hampshire Fair 1954 31.4 m 3,586
I-95 New Hampshire Fair 1975 78.6 m 3,566
BEAVER BROOK New Hampshire Fair 1984 11.0 m 3,564
NISSITISSIT RIVER New Hampshire Good 1931 8.5 m 3,553
WILD AMMONOOSUC RIVER New Hampshire Good 1989 38.3 m 3,551
CONNECTICUT RIVER New Hampshire Good 1981 204.8 m 3,544
NH 18 NH135 New Hampshire Fair 1983 30.2 m 3,544
NH135 New Hampshire Good 1982 28.7 m 3,544
CANAL New Hampshire Fair 1967 36.9 m 3,538
ANDROSCOGGIN RIVER New Hampshire Fair 1967 36.9 m 3,538
ASH SWAMP BROOK New Hampshire Good 1927 7.3 m 3,532
CROYDON BRANCH SUGAR R New Hampshire Good 1935 11.6 m 3,532
SUNCOOK RIVER New Hampshire Fair 1929 11.0 m 3,514
BIG RIVER New Hampshire Fair 1964 17.1 m 3,514
PENNICHUCK RESERVOIR New Hampshire Good 1999 7.3 m 3,502
FEE TPK New Hampshire Fair 1987 66.1 m 3,502
BLACK BROOK New Hampshire Poor 1961 7.0 m 3,502
STONY BROOK New Hampshire Poor 1929 7.0 m 3,496
COHAS BROOK New Hampshire Fair 1962 10.7 m 3,494
NHRR New Hampshire Good 1964 34.7 m 3,491
SQUAM RIVER New Hampshire Good 1976 13.4 m 3,490
SQUAM RIVER New Hampshire Fair 1905 8.5 m 3,488
NEW RIVER New Hampshire Fair 1955 7.0 m 3,464
ELLIS RIVER New Hampshire Good 1933 17.1 m 3,464
I-93 New Hampshire Fair 1959 87.8 m 3,454
SIMMS STREAM New Hampshire Good 1956 21.0 m 3,453
SPILLWAY CHANNEL New Hampshire Fair 1961 84.1 m 3,434
TAIL RACE New Hampshire Fair 1900 7.9 m 3,434
BAKER RIVER New Hampshire Good 1960 62.3 m 3,418

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.