Historic Bridges in Maine
630 bridges built before 1951 in Maine still in service today.
Bridges Built Before 1951
The United States has 630 bridges in Maine 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 |
|---|---|---|---|---|---|
| W BRANCH ELLIS RIVER | Maine | Poor | 1950 | 76 | 93 |
| MILLINOCKET STREAM | Maine | Poor | 1950 | 76 | 697 |
| TIDAL | Maine | Fair | 1950 | 76 | 388 |
| ST. GEORGE RIVER | Maine | Poor | 1950 | 76 | 14 |
| LITTLE RIVER | Maine | Fair | 1950 | 76 | 932 |
| MOUSAM RIVER | Maine | Poor | 1950 | 76 | 1,793 |
| BRANCH OF LITTLE RIVER | Maine | Fair | 1950 | 76 | 362 |
| SASONOA RIVER | Maine | Fair | 1950 | 76 | 3,280 |
| BUKER POND OUTLET | Maine | Poor | 1950 | 76 | 1,131 |
| HOPKINS STREAM | Maine | Poor | 1950 | 76 | 147 |
| SANDY STREAM | Maine | Fair | 1950 | 76 | 520 |
| DEAD STREAM | Maine | Fair | 1950 | 76 | 30 |
| LEMON STREAM | Maine | Poor | 1950 | 76 | 90 |
| KENDUSKEAG STREAM | Maine | Fair | 1950 | 76 | 390 |
| ST. CROIX STREAM | Maine | Fair | 1950 | 76 | 1,420 |
| PENOBSCOT RIVER | Maine | Fair | 1950 | 76 | 905 |
| HANCOCK BROOK | Maine | Fair | 1950 | 76 | 3,700 |
| SOUADABSCOOK STREAM | Maine | Fair | 1950 | 76 | 966 |
| S. BR. MEDUX. R. | Maine | Fair | 1950 | 76 | 840 |
| BLACK STREAM | Maine | Fair | 1950 | 76 | 1,763 |
| JOHNSON BROOK | Maine | Fair | 1950 | 76 | 97 |
| SEBASTICOOK RIVER | Maine | Fair | 1950 | 76 | 1,343 |
| EASTERN RIVER | Maine | Fair | 1950 | 76 | 1,438 |
| E BR SEBASTICOOK R | Maine | Fair | 1950 | 76 | 158 |
| LIMESTONE STREAM | Maine | Fair | 1950 | 76 | 314 |
| PLEASANT RIVER | Maine | Fair | 1950 | 76 | 2,611 |
| VIOLET STREAM | Maine | Fair | 1950 | 76 | 700 |
| PEMAQUID RIVER | Maine | Fair | 1950 | 76 | 3,610 |
| ROUTES 11 17 100 202 | Maine | Fair | 1950 | 76 | 4,820 |
| WILSON STREAM | Maine | Fair | 1950 | 76 | — |
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.