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
DRAIN CANAL Louisiana Good 1940 86 28,780
DRAIN CANAL Louisiana Fair 1940 86 28,780
BAYOU LAFOURCHE Louisiana Poor 1940 86 2,380
I-10 Louisiana Poor 1940 86 19,200
DRAIN CANAL Louisiana Fair 1940 86 25,051
SELLERS CANAL Louisiana Fair 1940 86 25,051
BAYOU Louisiana Fair 1940 86 79
CREEK Louisiana Poor 1940 86 1,518
KCS RAILROAD Louisiana Fair 1940 86 150
CROSS BAYOU Louisiana Poor 1940 86 5,484
CREEK Louisiana Good 1940 86 14,847
MAHLIN BAYOU Louisiana Good 1940 86 9,576
CREEK Louisiana Fair 1940 86 4,492
ICG RR Louisiana Poor 1940 86 5,484
ICG RR Louisiana Poor 1940 86 5,484
STEEP GULLY BRANCH Louisiana Poor 1940 86 77
MISSISSIPPI RIVER Louisiana Fair 1940 86 21,661
US 61-SCENIC Louisiana Poor 1940 86 12,262
US 61-SCENIC Louisiana Poor 1940 86 26,376
WARD CREEK Louisiana Fair 1940 86 13,549
LA 415/M P RR @ LOBDELL Louisiana Poor 1940 86 12,262
DRAINAGE CHANNEL Louisiana Fair 1940 86 3
US 90 BUS @ AVONDALE Louisiana Fair 1941 85 49,920
BAYOU TERREBONNE Louisiana Fair 1941 85 8,922
LITTLE CAILLOU Louisiana Fair 1941 85 8,922
BAYOU TECHE Louisiana Fair 1941 85 3,834
CHARENTON Louisiana Poor 1941 85 6,242
BAYOU TECHE Louisiana Poor 1941 85 883
TEN MILE CREEK TRIB. Louisiana Good 1941 85 2,773
SALINE BAYOU RELIEF Louisiana Poor 1941 85 310
MILL CREEK Louisiana Poor 1941 85 310
CREEK Louisiana Good 1941 85 5,116
SLOUGH Louisiana Good 1941 85 11,418
CONC BOX XING Louisiana Good 1942 84 23,719
CONC BOX XING Louisiana Good 1942 84 23,719
CONC BOX XING Louisiana Good 1942 84 23,719
CONC BOX XING Louisiana Good 1942 84 23,719
DEBLANC COULEE Louisiana Fair 1942 84 553
BAYOU TECHE ST M. Louisiana Fair 1942 84 8,684
CREEK Louisiana Poor 1942 84 1,020
SALS BRANCH Louisiana Fair 1942 84 2,917
CREEK Louisiana Fair 1943 83 3,472
CREEK Louisiana Fair 1943 83 3,472
CLARKE BAYOU REL Louisiana Fair 1943 83 3,472
CLARKE BAYOU Louisiana Fair 1943 83 3,472
CANEY BRANCH Louisiana Fair 1943 83 3,472
DRAIN Louisiana Good 1943 83 3,472
CREEK Louisiana Fair 1943 83 396
CREEK Louisiana Good 1943 83 7,277
TCHEFUNCTA RIVER Louisiana Fair 1943 83 1,162

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.