Historic Bridges in Louisiana

614 bridges built before 1951 in Louisiana still in service today.

Bridges Built Before 1951

The United States has 614 bridges in Louisiana 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
BAYOU TECHE JEAN. Louisiana Poor 1944 82 496
DIVERSION CANAL Louisiana Fair 1944 82 17,561
BAYOU RAPIDES Louisiana Fair 1944 82 42,243
DIVERSION CANAL Louisiana Fair 1944 82 10,946
KINCAID LAKE Louisiana Fair 1944 82 9,482
DRAIN Louisiana Good 1944 82 9,482
DRAIN Louisiana Good 1944 82 22,385
DRAIN Louisiana Good 1944 82 22,385
DRAIN Louisiana Good 1944 82 22,385
BAYOU TORO Louisiana Fair 1944 82 3,483
CREEK Louisiana Good 1944 82 7,336
BLUE BRANCH Louisiana Poor 1944 82 482
BOGGY BRANCH Louisiana Poor 1944 82 482
LITTLE BRUSHY CREEK Louisiana Poor 1944 82 482
BRUSHY CREEK Louisiana Poor 1944 82 482
TEN MILE CREEK Louisiana Poor 1944 82 482
DRAIN Louisiana Poor 1944 82 482
PATOUT CANAL Louisiana Poor 1945 81 3,125
DINDE BAYOU Louisiana Poor 1945 81 2,625
MAPLE FORK Louisiana Fair 1945 81 22,287
CREEK Louisiana Good 1945 81 6,456
BLACK BAYOU RELIEF Louisiana Fair 1945 81 12,669
BLACK BAYOU Louisiana Good 1945 81 12,669
LITTLE BLACK BAY Louisiana Good 1945 81 6,071
CREEK Louisiana Fair 1945 81 6,071
MORGANZA FLDWY Louisiana Fair 1945 81 12,942
BAYOU BLACK Louisiana Fair 1946 80 3,687
CREEK Louisiana Fair 1946 80 1,786
TRIBUTARY TO STUMPY BAYO Louisiana Fair 1947 79 31
DRY CREEK Louisiana Fair 1947 79 1,806
CYPRESS BRANCH Louisiana Fair 1947 79 690
CYPRESS BAYOU Louisiana Fair 1947 79 472
PILLARS CREEK Louisiana Fair 1947 79 226
PILLARS CREEK Louisiana Fair 1947 79 226
WIGGINS BAYOU Louisiana Fair 1947 79 226
WIGGINS BAYOU RELIEF Louisiana Fair 1947 79 226
CREEK Louisiana Good 1947 79 2,252
BAYOU BARATARIA Louisiana Poor 1948 78 1,254
COMMMERICAL CANAL Louisiana Fair 1948 78 3,451
VERMILION RIVER Louisiana Fair 1948 78 16,800
VERMILION R @ MILTON Louisiana Fair 1948 78 738
CARENCRO BAYOU Louisiana Fair 1948 78 16,573
FOUR MILE BAYOU RELIEF Louisiana Fair 1948 78 856
FOUR MILE BAYOU RELIEF Louisiana Fair 1948 78 856
FOUR MILE BAYOU Louisiana Fair 1948 78 856
LAYS BAYOU Louisiana Fair 1948 78 5,237
LOWE CREEK Louisiana Fair 1948 78 1,590
CREEK Louisiana Fair 1948 78 1,382
CREEK Louisiana Fair 1948 78 1,382
BIG BRANCH Louisiana Fair 1948 78 40

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.