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Historic Bridges in New Hampshire

716 bridges built before 1951 in New Hampshire still in service today.

Bridges Built Before 1951

The United States has 716 bridges in New Hampshire built before 1951 that remain in active service. These structures are 75+ years old — many predate modern engineering codes and were not designed for today's traffic volumes and vehicle weights. The average design life of a bridge is 50 years, making these aging structures a significant infrastructure concern.

Clear
Bridge State Condition Year Built Age (Years) ADT
SUCKER BROOK New Hampshire Good 1930 96 2,682
BIG RIVER New Hampshire Good 1930 96 96
WOODMAN BROOK New Hampshire Fair 1930 96 96
INDIAN RIVER New Hampshire Poor 1930 96 655
INDIAN RIVER New Hampshire Fair 1930 96 6,096
BRYANT BROOK New Hampshire Good 1930 96 96
RED WATER BROOK New Hampshire Fair 1930 96 96
E BRANCH MOHAWK RIVER New Hampshire Fair 1930 96 96
ARTIST FALLS BROOK New Hampshire Good 1930 96 8,975
BLOW-ME-DOWN BROOK New Hampshire Fair 1930 96 82
BOG POND BROOK New Hampshire Fair 1930 96 2,913
PISCATAQUOG RIVER New Hampshire Fair 1930 96 96
S BRANCH BAKER RIVER New Hampshire Fair 1930 96 96
WILKINSON BROOK New Hampshire Fair 1930 96 96
MASCOMA RIVER New Hampshire Good 1930 96 663
EXETER RIVER New Hampshire Fair 1930 96 416
LITTLE RIVER New Hampshire Fair 1930 96 13
LITTLE RIVER New Hampshire Fair 1930 96 6,155
BRENNAN BROOK New Hampshire Fair 1930 96 27
RAND BROOK New Hampshire Fair 1930 96 96
S BR PISCATAQUOG RIVER New Hampshire Fair 1930 96 17
S BR PISCATAQUOG RIVER New Hampshire Fair 1930 96 96
GALE RIVER New Hampshire Fair 1930 96 629
TROW BROOK New Hampshire Fair 1930 96 96
SMITH BROOK New Hampshire Fair 1930 96 96
SKINNER BROOK New Hampshire Fair 1930 96 96
COCKERMOUTH RIVER New Hampshire Good 1930 96 173
MOOSE BROOK New Hampshire Good 1930 96 431
COCKERMOUTH RIVER New Hampshire Fair 1930 96 1,167
NEEDLE SHOP BROOK New Hampshire Poor 1930 96 64
WILDCAT BROOK New Hampshire Fair 1930 96 96
GREAT BROOK New Hampshire Fair 1930 96 216
MILL BROOK New Hampshire Fair 1930 96 3,081
GREAT BROOK New Hampshire Fair 1930 96 2,653
HARVARD BROOK New Hampshire Good 1930 96 2,333
POND OUTLET New Hampshire Fair 1930 96 96
SOUCOOK RIVER New Hampshire Fair 1930 96 96
MINNEWAWA BROOK New Hampshire Fair 1930 96 574
MINNEWAWA BROOK New Hampshire Fair 1930 96 96
CONNECTICUT RIVER New Hampshire Fair 1930 96 444
CSX New Hampshire Fair 1930 96 400
BROOK New Hampshire Good 1930 96 96
SUGAR RIVER New Hampshire Fair 1930 96 10,042
JACOBS BROOK New Hampshire Poor 1930 96 244
JACOBS BROOK New Hampshire Fair 1930 96 53
JACOBS BROOK New Hampshire Fair 1930 96 53
PINE RIVER New Hampshire Fair 1930 96 7,537
BAKER RIVER New Hampshire Fair 1930 96 4,355
CONNECTICUT RIVER New Hampshire Good 1930 96 500
NHRR(ABD) New Hampshire Poor 1930 96 2,191

About Historic Bridge Data

Bridges built before 1951 are classified as historic in this database. Many were designed to 1940s standards with lower load limits and narrower lanes. While FHWA requires regular inspections of all bridges regardless of age, older structures often require more frequent monitoring and rehabilitation investment.

All Bridges Poor Condition Scour Critical Bridge Stats