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 |
|---|---|---|---|---|---|
| MOOSUP RIVER | Connecticut | Good | 1930 | 96 | 402 |
| FIVE MILE RIVER | Connecticut | Fair | 1930 | 96 | 550 |
| HARBOR BROOK | Connecticut | Fair | 1930 | 96 | 808 |
| NORWALK RIVER | Connecticut | Fair | 1930 | 96 | 155 |
| LITTLE JACKS BROOK | Connecticut | Fair | 1930 | 96 | 898 |
| MILL PLAIN SWAMP | Connecticut | Fair | 1930 | 96 | 9,080 |
| MORGAN BROOK | Connecticut | Fair | 1930 | 96 | 1,045 |
| STILL RIVER | Connecticut | Fair | 1930 | 96 | 338 |
| FIVE MILE RIVER | Connecticut | Fair | 1930 | 96 | 1,300 |
| MOUNT HOPE RIVER | Connecticut | Fair | 1930 | 96 | 2,100 |
| MUDDY BROOK | Connecticut | Fair | 1930 | 96 | 1,924 |
| HARBOR BROOK | Connecticut | Fair | 1930 | 96 | 6,700 |
| QUINEBAUG RIVER | Connecticut | Fair | 1930 | 96 | 8,200 |
| PADANARAM BROOK | Connecticut | Fair | 1930 | 96 | 4,418 |
| STREAM | Connecticut | Fair | 1930 | 96 | 120 |
| OLD SHERMAN HILL ROAD | Connecticut | Fair | 1931 | 95 | 7,400 |
| HOUSATONIC RIVER | Connecticut | Good | 1931 | 95 | 3,400 |
| HOUSATONIC RAILROAD | Connecticut | Fair | 1931 | 95 | 3,400 |
| ROARING BROOK | Connecticut | Poor | 1931 | 95 | 3,800 |
| EAST ASPETUCK RIVER | Connecticut | Fair | 1931 | 95 | 9,300 |
| EAST ASPETUCK RIVER | Connecticut | Fair | 1931 | 95 | 5,400 |
| EAST ASPETUCK RIVER | Connecticut | Fair | 1931 | 95 | 7,300 |
| FIVE MILE RIVER | Connecticut | Fair | 1931 | 95 | 4,700 |
| CORY BROOK | Connecticut | Fair | 1931 | 95 | 3,300 |
| QUINEBAUG RIVER | Connecticut | Fair | 1931 | 95 | 2,600 |
| MILL RIVER | Connecticut | Good | 1931 | 95 | 24,000 |
| LONG MEADOW POND BROOK | Connecticut | Fair | 1931 | 95 | 1,000 |
| PAWCATUCK RIVER | Connecticut | Poor | 1932 | 94 | 16,400 |
| SALMON RIVER | Connecticut | Fair | 1932 | 94 | 6,000 |
| WHITE BROOK | Connecticut | Fair | 1932 | 94 | 9,200 |
| FARMILL RIVER | Connecticut | Fair | 1932 | 94 | 3,250 |
| MERRICK BROOK | Connecticut | Poor | 1932 | 94 | — |
| TANKERHOOSEN RIVER | Connecticut | Fair | 1932 | 94 | 18,600 |
| METRO NORTH RAILROAD | Connecticut | Poor | 1933 | 93 | 14,300 |
| GUINEA BROOK | Connecticut | Poor | 1933 | 93 | 2,200 |
| ROUTE 10 | Connecticut | Fair | 1933 | 93 | 18,200 |
| EAST ASPETUCK RIVER | Connecticut | Fair | 1933 | 93 | 6,600 |
| FENTON RIVER | Connecticut | Good | 1933 | 93 | 4,000 |
| LITTLE RIVER | Connecticut | Fair | 1933 | 93 | 9,100 |
| LITTLE RIVER | Connecticut | Fair | 1933 | 93 | 9,100 |
| JACKS BROOK | Connecticut | Fair | 1933 | 93 | 13,900 |
| LITTLE RIVER | Connecticut | Fair | 1933 | 93 | 14,800 |
| LITTLE RIVER | Connecticut | Fair | 1933 | 93 | 13,700 |
| LITTLE RIVER | Connecticut | Fair | 1933 | 93 | 13,700 |
| FULLING MILL BROOK | Connecticut | Fair | 1933 | 93 | 12,300 |
| FULLING MILL BROOK | Connecticut | Fair | 1933 | 93 | 12,300 |
| MATTABESSET RIVER | Connecticut | Fair | 1933 | 93 | 17,100 |
| MATTABESSET RIVER | Connecticut | Fair | 1933 | 93 | 11,000 |
| AMTRAK RAILROAD | Connecticut | Fair | 1933 | 93 | 6,200 |
| BELDEN BROOK | Connecticut | Fair | 1933 | 93 | 2,500 |
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.