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 |
|---|---|---|---|---|---|
| METRO NORTH RAILROAD | Connecticut | Fair | 1900 | 126 | 1,853 |
| METRO-NORTH RAILROAD | Connecticut | Fair | 1900 | 126 | 3,100 |
| METRO-NORTH RAILROAD | Connecticut | Fair | 1900 | 126 | 1,058 |
| RIPPOWAM RIVER | Connecticut | Fair | 1900 | 126 | 7,750 |
| PRIVATE ROAD | Connecticut | Fair | 1900 | 126 | 14,100 |
| MILL RIVER | Connecticut | Fair | 1900 | 126 | 1,365 |
| PEQUABUCK RIVER | Connecticut | Good | 1900 | 126 | 12,415 |
| PEQUABUCK RIVER | Connecticut | Poor | 1900 | 126 | 2,805 |
| COGINCHAUG RIVER | Connecticut | Fair | 1900 | 126 | 1,654 |
| MISERY BROOK | Connecticut | Fair | 1900 | 126 | 5,826 |
| HOCKANUM RIVER | Connecticut | Fair | 1900 | 126 | 1,655 |
| ROCKLEDGE BROOK | Connecticut | Fair | 1900 | 126 | 380 |
| LITTLE RIVER | Connecticut | Poor | 1900 | 126 | 1,178 |
| NATCHAUG RIVER | Connecticut | Fair | 1900 | 126 | 398 |
| TEN MILE RIVER | Connecticut | Good | 1900 | 126 | 180 |
| HOP RIVER | Connecticut | Good | 1900 | 126 | 1,500 |
| IRON STREAM | Connecticut | Fair | 1900 | 126 | 258 |
| NONEWAUG RIVER | Connecticut | Fair | 1900 | 126 | 318 |
| MASHAMOQUET BROOK | Connecticut | Fair | 1900 | 126 | 118 |
| METRO NORTH RAILROAD | Connecticut | Fair | 1900 | 126 | 10,800 |
| BROAD BROOK | Connecticut | Fair | 1900 | 126 | 148 |
| METRO NORTH RAILROAD | Connecticut | Fair | 1900 | 126 | 3,400 |
| METRO NORTH RAILROAD | Connecticut | Fair | 1900 | 126 | 4,700 |
| MASHAMOQUET BROOK | Connecticut | Good | 1900 | 126 | 132 |
| MASHAMOQUET BROOK | Connecticut | Poor | 1900 | 126 | 371 |
| CHERRY BROOK | Connecticut | Fair | 1900 | 126 | 224 |
| WILLIMANTIC RIVER | Connecticut | Fair | 1900 | 126 | 527 |
| WEST BRANCH TROUT BROOK | Connecticut | Fair | 1901 | 125 | 15,660 |
| METRO NORTH RAILROAD | Connecticut | Fair | 1901 | 125 | 5,146 |
| HOUSATONIC RAILROAD | Connecticut | Fair | 1901 | 125 | 1,500 |
| METRO NORTH RAILROAD | Connecticut | Good | 1903 | 123 | 7,600 |
| HOP BROOK | Connecticut | Fair | 1904 | 122 | 2,600 |
| HOCKANUM RIVER | Connecticut | Fair | 1904 | 122 | 6,700 |
| BIRCH MOUNTAIN BROOK | Connecticut | Fair | 1905 | 121 | 1,200 |
| HORSENECK BROOK | Connecticut | Good | 1905 | 121 | 1,890 |
| CONNECTICUT RIVER | Connecticut | Fair | 1906 | 120 | 135,200 |
| AMTRAK RAILROAD | Connecticut | Fair | 1906 | 120 | 3,600 |
| METRO NORTH RAILROAD | Connecticut | Fair | 1906 | 120 | 3,092 |
| MAD RIVER | Connecticut | Fair | 1906 | 120 | 6,000 |
| AMTRAK RAILROAD | Connecticut | Fair | 1906 | 120 | 2,287 |
| MAD RIVER | Connecticut | Good | 1907 | 119 | 3,500 |
| AMTRAK & CENTRAL NE RR | Connecticut | Fair | 1907 | 119 | 9,200 |
| METRO NORTH RAILROAD | Connecticut | Fair | 1907 | 119 | 408 |
| MIANUS RIVER | Connecticut | Fair | 1907 | 119 | 6,580 |
| METRO NORTH RAILROAD | Connecticut | Fair | 1907 | 119 | 3,865 |
| ROOSTER RIVER OVERFLOW | Connecticut | Fair | 1907 | 119 | 7,390 |
| MILL RIVER | Connecticut | Poor | 1908 | 118 | 4,100 |
| YANTIC RIVER | Connecticut | Fair | 1908 | 118 | 465 |
| CONN. SOUTHERN RAILROAD | Connecticut | Fair | 1909 | 117 | 4,730 |
| YELLOW MILL CHANNEL | Connecticut | Good | 1910 | 116 | 20,200 |
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.