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 |
|---|---|---|---|---|---|
| NORTHFIELD BROOK | Connecticut | Fair | 1946 | 80 | 30 |
| ROUTE 15 | Connecticut | Fair | 1946 | 80 | 5,000 |
| ROUTE 15 | Connecticut | Fair | 1946 | 80 | 7,500 |
| ROUTE 15 | Connecticut | Fair | 1947 | 79 | 4,000 |
| ROUTE 15 | Connecticut | Fair | 1947 | 79 | 14,800 |
| ROUTE 15 | Connecticut | Fair | 1947 | 79 | 3,289 |
| TOELLES ROAD | Connecticut | Good | 1947 | 79 | 68,200 |
| QUINNIPIAC STREET | Connecticut | Fair | 1947 | 79 | 63,700 |
| ROUTE 15 | Connecticut | Fair | 1947 | 79 | 12,200 |
| AMTRAK RAILROAD | Connecticut | Fair | 1947 | 79 | 65,800 |
| ROUTE 15 | Connecticut | Fair | 1947 | 79 | 6,000 |
| WILLIMANTIC RIVER | Connecticut | Fair | 1947 | 79 | 4,600 |
| NEW ENGLAND CENTRAL RR | Connecticut | Poor | 1947 | 79 | 4,600 |
| MORGAN BROOK | Connecticut | Fair | 1947 | 79 | 13,900 |
| ASPETUCK RIVER | Connecticut | Good | 1947 | 79 | 5,900 |
| PEQUABUCK RIVER | Connecticut | Fair | 1947 | 79 | 11,900 |
| MORGAN BROOK | Connecticut | Fair | 1947 | 79 | 5,400 |
| SR 598 | Connecticut | Fair | 1947 | 79 | 2,600 |
| HAMMOCK RIVER | Connecticut | Fair | 1947 | 79 | 2,200 |
| SALMON BROOK | Connecticut | Fair | 1947 | 79 | 6,730 |
| SHETUCKET RIVER | Connecticut | Fair | 1947 | 79 | 1,700 |
| STILL RIVER | Connecticut | Poor | 1947 | 79 | 246 |
| TURNEY CREEK | Connecticut | Fair | 1947 | 79 | 3,560 |
| MUDDY RIVER | Connecticut | Fair | 1947 | 79 | 10,800 |
| LYME STREET | Connecticut | Fair | 1948 | 78 | 69,600 |
| MERRICK BROOK AND TRAIL | Connecticut | Good | 1948 | 78 | 8,600 |
| QUINNIPIAC RIVER | Connecticut | Fair | 1948 | 78 | 10,600 |
| ROUTE 10 | Connecticut | Fair | 1948 | 78 | 67,800 |
| ROUTE 243 | Connecticut | Fair | 1948 | 78 | 102,800 |
| ROUTE 63 | Connecticut | Fair | 1948 | 78 | 68,300 |
| CIRCULAR AVENUE | Connecticut | Fair | 1948 | 78 | 77,800 |
| CONNOLLY PKWY | Connecticut | Fair | 1948 | 78 | 69,700 |
| ROUTE 15 | Connecticut | Fair | 1948 | 78 | 13,400 |
| BARTLETT BROOK | Connecticut | Good | 1948 | 78 | 2,700 |
| MILL RIVER | Connecticut | Fair | 1948 | 78 | 18,600 |
| BYRAM RIVER | Connecticut | Fair | 1948 | 78 | 12,160 |
| NOROTON RIVER | Connecticut | Fair | 1948 | 78 | 4,795 |
| MACEDONIA BROOK | Connecticut | Fair | 1948 | 78 | 318 |
| SANDY BROOK | Connecticut | Fair | 1948 | 78 | 673 |
| LIEUTENANT RIVER | Connecticut | Fair | 1948 | 78 | 59,000 |
| LITTLE RIVER | Connecticut | Good | 1949 | 77 | 6,400 |
| HAMILTON PARK ROAD | Connecticut | Good | 1949 | 77 | 19,400 |
| WEPAWAUG RIVER | Connecticut | Fair | 1949 | 77 | 68,300 |
| ROUTE 15 | Connecticut | Fair | 1949 | 77 | 10,000 |
| ROUTE 15 | Connecticut | Fair | 1949 | 77 | 1,700 |
| ROUTE 69 & WEST RIVER | Connecticut | Fair | 1949 | 77 | 58,500 |
| WINTERGREEN AVE & BROOK | Connecticut | Fair | 1949 | 77 | 39,400 |
| WINTERGREEN AVE & BROOK | Connecticut | Fair | 1949 | 77 | 39,960 |
| ROUTE 15 | Connecticut | Fair | 1949 | 77 | 6,000 |
| ROUTE 15 | Connecticut | Fair | 1949 | 77 | 1,400 |
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.