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.

Clear
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.