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 |
|---|---|---|---|---|---|
| MATTABESSET RIVER | Connecticut | Fair | 1935 | 91 | 7,100 |
| CHATFIELD HOLLOW BROOK | Connecticut | Fair | 1935 | 91 | 4,800 |
| FIVE MILE RIVER | Connecticut | Fair | 1935 | 91 | 9,400 |
| MIDDLE RIVER | Connecticut | Fair | 1935 | 91 | 1,900 |
| BACK RIVER | Connecticut | Poor | 1935 | 91 | 3,000 |
| CROOKED BROOK | Connecticut | Fair | 1935 | 91 | 1,400 |
| MUDDY BROOK | Connecticut | Fair | 1935 | 91 | 10,100 |
| CABIN BROOK | Connecticut | Fair | 1935 | 91 | 2,100 |
| BANTAM RIVER | Connecticut | Fair | 1935 | 91 | 2,400 |
| E BRANCH NAUGATUCK RIVER | Connecticut | Poor | 1935 | 91 | 700 |
| HOUSATONIC RAILROAD | Connecticut | Good | 1935 | 91 | 900 |
| CONVERSE POND BROOK | Connecticut | Fair | 1935 | 91 | 53,800 |
| TRANSYLVANIA BROOK | Connecticut | Fair | 1935 | 91 | 3,900 |
| CANAL | Connecticut | Fair | 1935 | 91 | 10,400 |
| RIPPOWAM RIVER | Connecticut | Fair | 1935 | 91 | 7,470 |
| NAUGATUCK RIVER | Connecticut | Fair | 1935 | 91 | 1,500 |
| LAKE WHITNEY | Connecticut | Poor | 1935 | 91 | 2,000 |
| COVE RIVER | Connecticut | Fair | 1935 | 91 | 7,100 |
| SUMNER BROOK | Connecticut | Poor | 1935 | 91 | 1,101 |
| MILL RIVER | Connecticut | Poor | 1935 | 91 | 6,505 |
| HOP RIVER | Connecticut | Good | 1935 | 91 | 169 |
| ROARING BROOK | Connecticut | Fair | 1935 | 91 | 2,163 |
| PALMER COVE | Connecticut | Poor | 1935 | 91 | 2,025 |
| HAMMONASSET RIVER | Connecticut | Good | 1935 | 91 | 841 |
| EIGHT MILE RIVER | Connecticut | Fair | 1935 | 91 | 836 |
| MERRICK BROOK | Connecticut | Fair | 1935 | 91 | 590 |
| FURNACE BROOK | Connecticut | Poor | 1935 | 91 | 644 |
| HAMMONASSET RIVER | Connecticut | Fair | 1935 | 91 | 2,833 |
| MILL RIVER | Connecticut | Fair | 1935 | 91 | 1,125 |
| MILL RIVER | Connecticut | Fair | 1935 | 91 | 4,140 |
| SASCO BROOK | Connecticut | Fair | 1935 | 91 | 3,090 |
| STONY BROOK | Connecticut | Poor | 1935 | 91 | 3,820 |
| MIANUS RIVER | Connecticut | Fair | 1935 | 91 | 4,390 |
| STEELE BROOK | Connecticut | Fair | 1935 | 91 | 4,100 |
| LOVERS LANE BROOK | Connecticut | Fair | 1935 | 91 | 780 |
| E BRANCH NAUGATUCK RIVER | Connecticut | Fair | 1935 | 91 | 535 |
| MAD RIVER | Connecticut | Fair | 1935 | 91 | 3,340 |
| MAD RIVER | Connecticut | Fair | 1935 | 91 | 3,340 |
| SUMNER BROOK | Connecticut | Fair | 1935 | 91 | 3,433 |
| RIVERSVILLE RD E BR BYRA | Connecticut | Fair | 1935 | 91 | 53,800 |
| FRENCH RIVER | Connecticut | Fair | 1935 | 91 | 3,800 |
| MAD RIVER | Connecticut | Fair | 1935 | 91 | 9,700 |
| SCANTIC RIVER | Connecticut | Fair | 1935 | 91 | 12,700 |
| PEQUONNOCK RIVER | Connecticut | Good | 1935 | 91 | 64,000 |
| HOP BROOK | Connecticut | Good | 1935 | 91 | 30 |
| HOUSATONIC RIVER | Connecticut | Fair | 1936 | 90 | 3,800 |
| ROUTE 322 | Connecticut | Poor | 1936 | 90 | 4,600 |
| TEN MILE RIVER | Connecticut | Fair | 1936 | 90 | 5,500 |
| TACONIC ROAD | Connecticut | Fair | 1936 | 90 | 62,900 |
| ROUTE 15 | Connecticut | Fair | 1936 | 90 | 1,500 |
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.