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 |
|---|---|---|---|---|---|
| CRYSTAL LAKE OUTLET | Maine | Fair | 1932 | 94 | 4,727 |
| CARRIAGE ROAD | Maine | Good | 1932 | 94 | 288 |
| MDOT RAILROAD | Maine | Poor | 1933 | 93 | — |
| QUICK STREAM | Maine | Fair | 1933 | 93 | 629 |
| ELLIS RIVER | Maine | Fair | 1933 | 93 | 372 |
| SACO RIVER (N OF E CHAN) | Maine | Fair | 1933 | 93 | 14,908 |
| HALFWAY BROOK | Maine | Poor | 1933 | 93 | 1,758 |
| HOLLY BROOK | Maine | Fair | 1933 | 93 | 2,230 |
| MUD POND INLET | Maine | Fair | 1933 | 93 | 1,153 |
| TUNK STREAM | Maine | Fair | 1933 | 93 | 999 |
| MEGUNTICOOK RIVER | Maine | Good | 1933 | 93 | 4,050 |
| MARTIN STREAM | Maine | Fair | 1933 | 93 | 751 |
| W.BR.DAVIS STREAM | Maine | Fair | 1933 | 93 | 1,090 |
| CRYSTAL STREAM | Maine | Poor | 1933 | 93 | 870 |
| MT ZIRCON BROOK | Maine | Poor | 1933 | 93 | 545 |
| DEAD STREAM | Maine | Fair | 1933 | 93 | 629 |
| WILSON STREAM | Maine | Fair | 1933 | 93 | 2,280 |
| MAIN STR (SEBASTICOOK R) | Maine | Fair | 1933 | 93 | 2,083 |
| MACWAHOC STREAM | Maine | Fair | 1933 | 93 | 384 |
| 15 MILE STREAM | Maine | Poor | 1933 | 93 | 525 |
| MESSALONSKEE STREAM | Maine | Fair | 1933 | 93 | 4,400 |
| STONY BROOK | Maine | Fair | 1933 | 93 | 191 |
| CASCADE STR | Maine | Poor | 1934 | 92 | 26 |
| WEST BR CATHANCE RIVER | Maine | Fair | 1934 | 92 | 2,243 |
| MARTIN STREAM | Maine | Poor | 1934 | 92 | 599 |
| SABATTUS RIVER | Maine | Fair | 1934 | 92 | 3,970 |
| CHANDLER RIVER | Maine | Poor | 1934 | 92 | 4,513 |
| WEST BR CATHANCE RIVER | Maine | Fair | 1934 | 92 | 2,243 |
| DAVIS STREAM | Maine | Fair | 1934 | 92 | 778 |
| BOND BROOK | Maine | Poor | 1934 | 92 | 13,526 |
| YORK RIVER | Maine | Fair | 1934 | 92 | 2,388 |
| CROOKED RIVER | Maine | Fair | 1934 | 92 | 1,322 |
| EAST BROOK | Maine | Fair | 1934 | 92 | 409 |
| FISH STREAM | Maine | Fair | 1934 | 92 | 2,276 |
| NORTH BRANCH DEAD RIVER | Maine | Fair | 1934 | 92 | 609 |
| ROYAL RIVER | Maine | Fair | 1934 | 92 | 474 |
| THE GURNET (TIDAL PAS.) | Maine | Good | 1934 | 92 | 2,930 |
| STEVENS BROOK | Maine | Fair | 1935 | 91 | 528 |
| MAINE CENTRAL RAILROAD | Maine | Fair | 1935 | 91 | 3,334 |
| W BR KENDUSKEAG | Maine | Poor | 1935 | 91 | 71 |
| ALDER STREAM | Maine | Poor | 1935 | 91 | 63 |
| PASSAGASSAWAKEAG RIVER | Maine | Poor | 1935 | 91 | 420 |
| COLSON STREAM | Maine | Poor | 1935 | 91 | 5,459 |
| NARRAGUAGUS RV | Maine | Poor | 1935 | 91 | 2,493 |
| SHEEPSCOT RIVER | Maine | Poor | 1935 | 91 | 2,241 |
| SHEEPSCOT RIVER | Maine | Poor | 1935 | 91 | 29 |
| ALDER STREAM | Maine | Fair | 1935 | 91 | 492 |
| MAIN STR (SEBASTICOOK R) | Maine | Fair | 1935 | 91 | 362 |
| CROOKED RIVER | Maine | Fair | 1935 | 91 | 1,322 |
| M.C.RR | Maine | Fair | 1935 | 91 | 13,952 |
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.