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.
| 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.