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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
ISINGLASS RIVER New Hampshire Poor 1951 36.3 m 14,407
SP TPK NH 16 New Hampshire Good 2020 59.1 m 14,360
I-393 US 4 US202 New Hampshire Good 1988 59.4 m 14,339
CSX(ABD) New Hampshire Poor 1936 36.6 m 14,314
NH132 New Hampshire Fair 1963 48.8 m 14,262
HALE ROAD New Hampshire Good 1963 12.2 m 14,262
NH104 NH132 New Hampshire Good 1963 45.1 m 14,262
SALMON BROOK New Hampshire Fair 1962 8.5 m 14,262
BLACK BROOK New Hampshire Fair 1975 7.0 m 14,252
NH127 New Hampshire Good 1962 33.8 m 14,217
NH132 New Hampshire Fair 1963 48.8 m 14,217
SALMON BROOK New Hampshire Fair 1962 8.5 m 14,217
HALE ROAD New Hampshire Good 1963 12.2 m 14,217
OLD NH 3B New Hampshire Fair 1962 41.1 m 14,214
DANIEL STREET New Hampshire Good 1921 40.6 m 14,207
WINNIPESAUKEE RIVER New Hampshire Fair 1940 21.0 m 14,205
OLD NH 3B New Hampshire Fair 1962 42.4 m 14,205
BEAVER BROOK New Hampshire Good 1961 11.6 m 14,203
I-293 FEE TPK New Hampshire Fair 1957 29.3 m 14,149
COCHECO RIVER New Hampshire Fair 1883 40.5 m 14,115
CSX New Hampshire Fair 1971 21.3 m 14,099
SALMON BROOK New Hampshire Fair 1955 6.7 m 13,964
SQUAMSCOTT RIVER New Hampshire Good 2001 127.0 m 13,846
I-93 FEE TPK New Hampshire Good 2015 58.8 m 13,754
LAMPREY RIVER New Hampshire Fair 1962 29.0 m 13,739
BAKER RIVER New Hampshire Good 1968 78.9 m 13,729
ARTIST FALLS BROOK New Hampshire Good 1900 7.9 m 13,702
BLACKWATER RIVER New Hampshire Fair 1991 29.0 m 13,696
MASCOMA RIVER CSX New Hampshire Good 1945 116.7 m 13,685
NH103 New Hampshire Fair 1968 27.4 m 13,642
PISCATAQUOG RIVER New Hampshire Fair 1928 28.7 m 13,570
SALMON FALLS RIVER New Hampshire Good 1962 34.7 m 13,459
WARNER RIVER New Hampshire Fair 1966 58.2 m 13,402
NH155A New Hampshire Poor 1968 25.3 m 13,387
NH155 New Hampshire Good 1968 22.6 m 13,387
SACO RIVER New Hampshire Fair 1972 127.7 m 13,313
EXETER RIVER New Hampshire Fair 1934 19.8 m 13,290
SHAKER BROOK New Hampshire Fair 1951 9.4 m 13,249
SUGAR RIVER New Hampshire Fair 1981 40.5 m 13,248
TROY BROOK New Hampshire Fair 1970 8.2 m 13,156
MERRIMACK R CSX RD RAMP New Hampshire Poor 1970 311.8 m 13,150
SOUCOOK RIVER New Hampshire Good 1953 45.7 m 13,115
SALMON FALLS RIVER New Hampshire Fair 1945 25.0 m 13,084
DURKEE BROOK New Hampshire Good 2022 12.1 m 13,077
SOUHEGAN RIVER New Hampshire Fair 1921 34.4 m 13,075
BABOOSIC BROOK New Hampshire Poor 1933 9.1 m 13,024
RECREATION TRAIL New Hampshire Good 2009 31.1 m 13,006
WINNIPESAUKEE RIVER New Hampshire Fair 1922 44.2 m 12,980
US202 NH 9 New Hampshire Fair 1959 14.9 m 12,978
BRANCH RIVER New Hampshire Fair 1966 21.3 m 12,893

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.