Historic Bridges in Connecticut

860 bridges built before 1951 in Connecticut still in service today.

Bridges Built Before 1951

The United States has 860 bridges in Connecticut 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
PEQUONNOCK RIVER Connecticut Fair 1916 110 3,343
AMTRAK RAILROAD Connecticut Fair 1917 109 290
HOUSATONIC RIVER Connecticut Fair 1918 108 9,500
HOUSATONIC RIVER Connecticut Poor 1919 107 8,800
HOUSATONIC RAILROAD Connecticut Good 1919 107 1,900
METRO NORTH RAILROAD Connecticut Fair 1919 107 12,400
MILL BROOK Connecticut Good 1920 106 6,600
STILL RIVER Connecticut Fair 1920 106 8,600
ASMUN BROOK Connecticut Fair 1920 106 4,100
BEACON FALLS CANAL Connecticut Fair 1920 106 7,800
METRO-NORTH RAILROAD Connecticut Good 1920 106 857
METRO NORTH RAILROAD Connecticut Fair 1920 106 7,100
SUMNER BROOK Connecticut Poor 1920 106 2,892
PEQUABUCK RIVER Connecticut Fair 1920 106 3,631
OXOBOXO BROOK Connecticut Fair 1920 106 1,056
PACHAUG RIVER Connecticut Poor 1920 106 482
MILL RIVER Connecticut Good 1920 106 974
ASPETUCK RIVER Connecticut Fair 1920 106 885
ASPETUCK RIVER Connecticut Poor 1920 106 300
MOUNT HOPE RIVER Connecticut Fair 1920 106 129
BLACKLEDGE RIVER Connecticut Fair 1920 106 1,200
FACTORY TUNNEL Connecticut Good 1920 106 259
HOUSATONIC RIVER Connecticut Fair 1921 105 16,500
WEST RIVER Connecticut Fair 1921 105 23,100
NICKEL MINE BROOK Connecticut Fair 1921 105 2,500
PEQUABUCK RIVER Connecticut Good 1921 105 8,380
LITTLE RIVER Connecticut Fair 1921 105 500
MYSTIC RIVER Connecticut Fair 1922 104 11,000
NAUGATUCK RIVER Connecticut Fair 1922 104 20,300
LATIMERS BROOK Connecticut Fair 1922 104 15,200
BROAD BROOK Connecticut Fair 1922 104 1,000
NORWALK RIVER Connecticut Fair 1922 104 7,180
SKUNGAMAUG RIVER Connecticut Fair 1923 103 8,700
GILLETT BROOK Connecticut Good 1923 103 1,600
NEPAUG RIVER Connecticut Fair 1923 103 10,800
GUNN BROOK Connecticut Fair 1924 102 2,100
EIGHT MILE BROOK Connecticut Good 1924 102 9,800
MILL BROOK Connecticut Fair 1924 102 1,100
PAN AM RAILROAD Connecticut Good 1924 102 3,750
BLADENS RIVER Connecticut Fair 1924 102 2,333
WILLOW BROOK Connecticut Poor 1924 102 625
PATCHOGUE RIVER Connecticut Fair 1925 101 7,400
MOOSUP RIVER Connecticut Fair 1925 101 2,100
RESERVOIR BRK & CATTLE P Connecticut Fair 1925 101 7,200
QUINEBAUG RIVER Connecticut Fair 1925 101 10,400
SAUGATUCK RIVER Connecticut Fair 1925 101 8,000
EIGHT MILE RIVER Connecticut Fair 1925 101 3,300
JUDD BROOK Connecticut Fair 1925 101 5,400
MEANS BROOK Connecticut Fair 1925 101 16,400
OXOBOXO BROOK Connecticut Poor 1925 101 1,600

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.