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 |
|---|---|---|---|---|---|
| PLEASANT RIVER | Maine | Fair | 1946 | 80 | 3,823 |
| SHEEPSCOT RIVER | Maine | Fair | 1946 | 80 | 716 |
| MESSALONSKEE STREAM | Maine | Fair | 1946 | 80 | 7,219 |
| WILSON STREAM | Maine | Fair | 1946 | 80 | 8,650 |
| GREELEY STR./THOMPSON L. | Maine | Fair | 1946 | 80 | 1,723 |
| VALLEY BROOK | Maine | Fair | 1946 | 80 | 1,049 |
| KENDUSKEAG STREAM | Maine | Fair | 1946 | 80 | 2,218 |
| NONESUCH RIVER | Maine | Fair | 1946 | 80 | 16,250 |
| YORK RIVER | Maine | Fair | 1946 | 80 | 29,680 |
| NONESUCH RIVER | Maine | Good | 1947 | 79 | 37,280 |
| STEVENS BROOK | Maine | Poor | 1947 | 79 | 435 |
| OGUNQUIT RIVER | Maine | Fair | 1947 | 79 | 24,850 |
| MERRILAND RIVER | Maine | Good | 1947 | 79 | 25,580 |
| SACO RIVER | Maine | Fair | 1947 | 79 | 34,410 |
| PLEASANT RIVER | Maine | Poor | 1947 | 79 | 6,683 |
| ECHO LAKE OUTLET | Maine | Fair | 1947 | 79 | 2,386 |
| E BR SEBASTICOOK RIVER | Maine | Fair | 1947 | 79 | 950 |
| FULLER BROOK | Maine | Poor | 1947 | 79 | 2,150 |
| RTE 1 | Maine | Fair | 1947 | 79 | 7,281 |
| ST GEORGE RIVER | Maine | Fair | 1947 | 79 | 1,872 |
| NEZINSCOT RIVER | Maine | Poor | 1947 | 79 | 2,801 |
| CARLETON STREAM | Maine | Fair | 1947 | 79 | 1,148 |
| JACKSON STR. (DAVIS STR. | Maine | Poor | 1947 | 79 | 340 |
| OTTER BROOK | Maine | Poor | 1947 | 79 | 616 |
| RAMP US 1 TO I-95 | Maine | Fair | 1947 | 79 | 9,820 |
| SPRUCE CREEK | Maine | Fair | 1947 | 79 | 31,420 |
| B&MRR | Maine | Fair | 1948 | 78 | 24,850 |
| WELLS INTERCHANGE | Maine | Fair | 1948 | 78 | 24,850 |
| MOUSAM RIVER | Maine | Fair | 1948 | 78 | 25,580 |
| KENNEBUNK RIVER | Maine | Fair | 1948 | 78 | 27,050 |
| B&MRR | Maine | Fair | 1948 | 78 | 24,900 |
| WELLS INTER. | Maine | Fair | 1948 | 78 | 21,300 |
| MOUSAM RIVER | Maine | Fair | 1948 | 78 | 25,680 |
| KENNEBUNK RIVER | Maine | Fair | 1948 | 78 | 27,380 |
| SACO RIVER | Maine | Fair | 1948 | 78 | 35,170 |
| MILL STREAM | Maine | Poor | 1948 | 78 | 84 |
| GOOSE FARE CREEK | Maine | Poor | 1948 | 78 | 2,930 |
| SACO RIVER | Maine | Poor | 1948 | 78 | 8,158 |
| ROYAL RIVER | Maine | Fair | 1948 | 78 | 6,729 |
| THREE BROOK STREAM | Maine | Fair | 1948 | 78 | 5,030 |
| MERRILAND RIVER | Maine | Fair | 1948 | 78 | 2,460 |
| MEDUXNEKEAG RIVER | Maine | Fair | 1948 | 78 | 4,811 |
| PISCATAQUIS RIVER | Maine | Fair | 1948 | 78 | 360 |
| MADAGASCAL STREAM | Maine | Fair | 1948 | 78 | 436 |
| LITTLE ANDROSCOGGIN RI | Maine | Fair | 1948 | 78 | 14,062 |
| REEDS BRK/GRAHAM LAKE IN | Maine | Poor | 1948 | 78 | 2,328 |
| PRESTILE STREAM | Maine | Poor | 1948 | 78 | 380 |
| MATTANAWCOOK STREAM | Maine | Fair | 1948 | 78 | 5,002 |
| ST. GEORGE RIVER | Maine | Fair | 1948 | 78 | 583 |
| TEMPLE STREAM | Maine | Fair | 1948 | 78 | 255 |
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.