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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
BROOK New Hampshire Fair 1900 126 721
BROOK New Hampshire Good 1900 126 721
BEARDS BROOK New Hampshire Poor 1900 126 96
TAIL RACE New Hampshire Fair 1900 126 3,434
RECREATION TRAIL New Hampshire Fair 1900 126 603
COHAS BROOK New Hampshire Good 1900 126 2,560
BEAVER BROOK New Hampshire Poor 1900 126 6,111
SPICKET RIVER New Hampshire Fair 1900 126 20,229
SPICKET RIVER New Hampshire Poor 1900 126 4,883
SALMON BROOK New Hampshire Poor 1900 126 96
SALMON BROOK New Hampshire Good 1900 126 96
BEARCAMP RIVER New Hampshire Good 1900 126 96
ANDROSCOGGIN RIVER New Hampshire Poor 1900 126 281
SUGAR RIVER New Hampshire Good 1900 126 557
COLD BROOK New Hampshire Fair 1900 126 41
BROAD BROOK New Hampshire Good 1900 126 96
SMITH RIVER New Hampshire Good 1900 126 7,358
MINK BROOK New Hampshire Fair 1901 125 2,168
BLOOD BROOK New Hampshire Poor 1901 125 1,167
SQUAM RIVER New Hampshire Fair 1905 121 3,488
WILDCAT BROOK New Hampshire Fair 1905 121 151
CONTOOCOOK RIVER New Hampshire Fair 1905 121 96
CONTOOCOOK RIVER New Hampshire Good 1905 121 1,804
STONY BROOK New Hampshire Fair 1905 121 2,883
CSX New Hampshire Fair 1907 119 5,525
SUNCOOK RIVER New Hampshire Good 1909 117 96
CSX New Hampshire Fair 1910 116 657
GALE RIVER New Hampshire Fair 1910 116 235
SUGAR RIVER New Hampshire Fair 1910 116 96
CONNECTICUT RIVER New Hampshire Fair 1910 116 8,425
TANNERY POND OUTLET New Hampshire Fair 1910 116 96
NEEDLE SHOP BROOK New Hampshire Fair 1910 116 1
CONNECTICUT RIVER New Hampshire Fair 1911 115 642
CONNECTICUT RIVER New Hampshire Fair 1912 114 180
LAMPREY RIVER New Hampshire Good 1912 114 1,378
PISCATAQUA R BACK CHAN New Hampshire Fair 1913 113 7,000
RELIEF New Hampshire Good 1914 112 1,065
LAMPREY RIVER New Hampshire Poor 1914 112 547
AMMONOOSUC RIVER New Hampshire Good 1915 111 96
CONTOOCOOK RIVER New Hampshire Fair 1915 111 147
PISCATAQUOG (NORTH BR) New Hampshire Fair 1915 111 5,707
CSX(ABD) New Hampshire Fair 1915 111 11,812
BISHOP BROOK New Hampshire Fair 1915 111 96
SOUHEGAN RIVER New Hampshire Fair 1917 109 6,406
SHEDD BROOK New Hampshire Fair 1919 107 96
BEARDS BROOK New Hampshire Fair 1919 107 592
SPENCER BROOK New Hampshire Fair 1919 107 313
COLD RIVER New Hampshire Fair 1919 107 2,804
WARREN BROOK New Hampshire Good 1920 106 96
BEEBE RIVER New Hampshire Fair 1920 106 96

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