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 |
|---|---|---|---|---|---|
| SCANTIC RIVER | Connecticut | Fair | 1941 | 85 | 19,100 |
| ROUTE 314 - BERLIN TNPK. | Connecticut | Poor | 1942 | 84 | 16,000 |
| ROUTE 99-SILAS DEANE HWY | Connecticut | Fair | 1942 | 84 | 41,200 |
| SALMON BROOK | Connecticut | Fair | 1942 | 84 | 7,800 |
| ROUTE 15 | Connecticut | Fair | 1942 | 84 | 2,224 |
| ROUTE 175 | Connecticut | Fair | 1942 | 84 | 27,300 |
| ROUTE 15 & US ROUTE 5 | Connecticut | Fair | 1942 | 84 | 4,500 |
| FOLLY BROOK BOULEVARD | Connecticut | Fair | 1942 | 84 | 32,000 |
| ROUTE 314 & WOLCOTT HILL | Connecticut | Fair | 1942 | 84 | 34,900 |
| P&W RR & HARTFORD AVE | Connecticut | Poor | 1942 | 84 | 47,500 |
| ABINGTON BROOK | Connecticut | Good | 1942 | 84 | 6,600 |
| BANTAM RIVER | Connecticut | Fair | 1942 | 84 | 3,400 |
| SPRUCE BROOK | Connecticut | Fair | 1942 | 84 | 13,400 |
| MATTABESSET RIVER | Connecticut | Fair | 1942 | 84 | 9,700 |
| FARMINGTON CANAL GREENWA | Connecticut | Fair | 1942 | 84 | 4,800 |
| NOD BROOK | Connecticut | Fair | 1942 | 84 | 2,922 |
| FARM RIVER | Connecticut | Fair | 1942 | 84 | 3,800 |
| HOCKANUM RIVER | Connecticut | Good | 1942 | 84 | 6,300 |
| MILL RIVER | Connecticut | Good | 1943 | 83 | 72,300 |
| MC MULLEN AVENUE | Connecticut | Poor | 1943 | 83 | 32,000 |
| AMTRAK RAILROAD | Connecticut | Fair | 1943 | 83 | 10,100 |
| MILL BROOK | Connecticut | Fair | 1943 | 83 | 72,600 |
| MAD RIVER | Connecticut | Fair | 1943 | 83 | 10,100 |
| THAMES RV RR LOCAL ROADS | Connecticut | Poor | 1943 | 83 | 42,600 |
| LONG SWAMP BROOK | Connecticut | Fair | 1944 | 82 | 4,400 |
| COMSTOCK BROOK | Connecticut | Fair | 1944 | 82 | 745 |
| GREAT BROOK | Connecticut | Fair | 1945 | 81 | 12,900 |
| MINT BROOK | Connecticut | Fair | 1945 | 81 | 3,000 |
| MUDDY RIVER | Connecticut | Good | 1945 | 81 | 714 |
| WEST BRANCH SALMON BROOK | Connecticut | Fair | 1945 | 81 | 129 |
| QUANDUCK BROOK | Connecticut | Fair | 1946 | 80 | 6,100 |
| SR 707(WHITNEY AVE.) | Connecticut | Fair | 1946 | 80 | 67,800 |
| SR 717 (DIXWELL AVE) | Connecticut | Fair | 1946 | 80 | 68,600 |
| QUINNIPIAC RIVER | Connecticut | Poor | 1946 | 80 | 33,700 |
| QUINNIPIAC RIVER | Connecticut | Fair | 1946 | 80 | 35,800 |
| ROUTE 68 | Connecticut | Fair | 1946 | 80 | 65,800 |
| MILLER AVENUE | Connecticut | Fair | 1946 | 80 | 71,100 |
| ROUTE 15 | Connecticut | Fair | 1946 | 80 | 3,200 |
| BALDWINS POND | Connecticut | Fair | 1946 | 80 | 24,200 |
| WESTFIELD ROAD | Connecticut | Fair | 1946 | 80 | 24,200 |
| PACHAUG RIVER | Connecticut | Fair | 1946 | 80 | 3,900 |
| ABANDONED CANAL | Connecticut | Fair | 1946 | 80 | 3,900 |
| QUINNIPIAC RIVER | Connecticut | Good | 1946 | 80 | 6,100 |
| TOWN FARM BROOK | Connecticut | Fair | 1946 | 80 | 5,600 |
| SNAKE MEADOW BROOK | Connecticut | Good | 1946 | 80 | 850 |
| AMTRAK RAILROAD | Connecticut | Fair | 1946 | 80 | 6,400 |
| FARMINGTON CANAL GREENWA | Connecticut | Fair | 1946 | 80 | 3,700 |
| RACE BROOK | Connecticut | Good | 1946 | 80 | 2,200 |
| MILL RIVER | Connecticut | Fair | 1946 | 80 | 4,386 |
| LITTLE RIVER | Connecticut | Fair | 1946 | 80 | 320 |
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.