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 |
|---|---|---|---|---|---|
| ROUTE 104 | Connecticut | Fair | 1936 | 90 | 64,420 |
| RIPPOWAM RIVER | Connecticut | Fair | 1936 | 90 | 73,120 |
| PERRY AVENUE | Connecticut | Fair | 1936 | 90 | 65,320 |
| ROUTE 15 | Connecticut | Fair | 1936 | 90 | 12,000 |
| NAUGATUCK RIVER | Connecticut | Fair | 1936 | 90 | 15,600 |
| BLADENS RIVER | Connecticut | Fair | 1936 | 90 | 18,300 |
| BLACK HALL RIVER | Connecticut | Fair | 1936 | 90 | 5,400 |
| MIDDLE RIVER | Connecticut | Good | 1936 | 90 | 7,400 |
| LITTLE RIVER | Connecticut | Fair | 1936 | 90 | 3,000 |
| MILL RIVER | Connecticut | Fair | 1936 | 90 | 5,900 |
| MORRIS CREEK | Connecticut | Poor | 1936 | 90 | 2,600 |
| AMTRAK | Connecticut | Fair | 1936 | 90 | 2,200 |
| AMTRAK RAILROAD | Connecticut | Good | 1936 | 90 | 3,750 |
| FIVE MILE BROOK | Connecticut | Good | 1936 | 90 | 4,300 |
| P & W RAILROAD | Connecticut | Fair | 1936 | 90 | 167 |
| HOUSATONIC RR | Connecticut | Fair | 1936 | 90 | 5,000 |
| NORTH STAMFORD RESERVOIR | Connecticut | Poor | 1936 | 90 | 4,220 |
| MERRICK BROOK | Connecticut | Poor | 1936 | 90 | 357 |
| KETCH BROOK | Connecticut | Fair | 1936 | 90 | 2,200 |
| EIGHT MILE RIVER | Connecticut | Fair | 1936 | 90 | 450 |
| FRENCH RIVER | Connecticut | Poor | 1936 | 90 | 1,300 |
| COGINCHAUG RIVER | Connecticut | Fair | 1936 | 90 | 881 |
| COGINCHAUG RIVER | Connecticut | Fair | 1936 | 90 | 1,258 |
| BASS BROOK SPILLWAY | Connecticut | Fair | 1936 | 90 | 130 |
| FARMILL RIVER | Connecticut | Good | 1936 | 90 | 3,722 |
| P & W RAILROAD | Connecticut | Fair | 1936 | 90 | 56 |
| MASHAMOQUET BROOK | Connecticut | Fair | 1936 | 90 | 4,200 |
| COGINCHAUG RIVER | Connecticut | Fair | 1936 | 90 | 2,400 |
| SAWMILL BROOK | Connecticut | Fair | 1936 | 90 | 644 |
| WEPAWAUG RIVER | Connecticut | Good | 1936 | 90 | 7,200 |
| SUMNER BROOK | Connecticut | Good | 1936 | 90 | 9,100 |
| NORTHFIELD BROOK | Connecticut | Fair | 1936 | 90 | 60 |
| WILLIMANTIC RIVER | Connecticut | Fair | 1937 | 89 | 6,400 |
| PROVIDENCE&WORCESTER RR | Connecticut | Fair | 1937 | 89 | 7,300 |
| FIVE MILE RIVER | Connecticut | Fair | 1937 | 89 | 5,100 |
| FRENCH RIVER | Connecticut | Fair | 1937 | 89 | 4,300 |
| ROUTE 15 | Connecticut | Fair | 1937 | 89 | 9,500 |
| ROUTE 15 | Connecticut | Fair | 1937 | 89 | 1,479 |
| MIANUS RIVER | Connecticut | Fair | 1937 | 89 | 65,120 |
| ROUTE 15 | Connecticut | Fair | 1937 | 89 | 4,057 |
| ROUTE 137 | Connecticut | Fair | 1937 | 89 | 66,520 |
| ROUTE 15 | Connecticut | Fair | 1937 | 89 | 6,200 |
| ROUTE 15 | Connecticut | Fair | 1937 | 89 | 2,500 |
| ROUTE 106 | Connecticut | Fair | 1937 | 89 | 70,400 |
| ROUTE 15 | Connecticut | Fair | 1937 | 89 | 7,800 |
| ROUTE 123 | Connecticut | Fair | 1937 | 89 | 69,900 |
| METRO-NORTH RAILROAD | Connecticut | Fair | 1937 | 89 | 51,000 |
| ROUTE 53 | Connecticut | Fair | 1937 | 89 | 56,400 |
| PIPER BROOK | Connecticut | Fair | 1937 | 89 | 14,100 |
| BEAVER BROOK | Connecticut | Fair | 1937 | 89 | 6,300 |
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.