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
CREEK Louisiana Fair 1950 76 2,211
PANAMA CANAL Louisiana Fair 1950 76 22,576
DRAINAGE CANAL Louisiana Poor 1950 76 4
CORPORATION CANAL Louisiana Fair 1950 76 23,240
CITY PARK LAKES Louisiana Fair 1950 76 3,500
BAYOU PLAQUEMINE Louisiana Poor 1950 76 10,843
HWY 1 ROAD SIDE DITCH Louisiana Good 1950 76 800
LIT NATALBANY R. Louisiana Good 1950 76 8,928
NATALBANY RIVER Louisiana Fair 1950 76 8,928
Natalbany Creek Louisiana Poor 1950 76 14
LEE CREEK Louisiana Fair 1950 76 7,160
YELLOW BRANCH Louisiana Fair 1950 76 7,160
BOGUE LUSA CREEK Louisiana Fair 1950 76 5,213
LITTLE CREEK Louisiana Fair 1950 76 533

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.