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.
| Bridge | State | Condition | Year Built | Age (Years) | ADT |
|---|---|---|---|---|---|
| JUDD BAYOU | Louisiana | Fair | 1908 | 118 | — |
| INNER HARBOR NAVIGATION | Louisiana | Poor | 1919 | 107 | — |
| MARTEAU BAYOU | Louisiana | Poor | 1919 | 107 | 40 |
| DRAIN | Louisiana | Good | 1920 | 106 | 4,992 |
| CHOCTAW BAYOU | Louisiana | Fair | 1921 | 105 | 100 |
| YOUNGS BAYOU | Louisiana | Fair | 1922 | 104 | 8,579 |
| STREAM | Louisiana | Fair | 1923 | 103 | 4,376 |
| BAYOU MORRIS | Louisiana | Poor | 1923 | 103 | 15 |
| BAYOU POYDRAS | Louisiana | Good | 1923 | 103 | 1,351 |
| DRAINAGE CANAL | Louisiana | Good | 1923 | 103 | 1,204 |
| CITY PARK LAGOON | Louisiana | Fair | 1924 | 102 | — |
| TIGER BRANCH | Louisiana | Fair | 1924 | 102 | 962 |
| CREEK | Louisiana | Fair | 1924 | 102 | 422 |
| CREEK | Louisiana | Fair | 1924 | 102 | 2,238 |
| CREEK | Louisiana | Fair | 1924 | 102 | 2,370 |
| COLEMAN BAYOU | Louisiana | Fair | 1924 | 102 | 3,570 |
| CREEK | Louisiana | Fair | 1924 | 102 | 525 |
| CREEK | Louisiana | Fair | 1924 | 102 | 5,107 |
| CREEK | Louisiana | Fair | 1925 | 101 | 890 |
| SHERMAN CREEK | Louisiana | Fair | 1925 | 101 | 9,002 |
| COOLEY BR RELIEF | Louisiana | Fair | 1925 | 101 | 9,002 |
| COOLEY BRANCH | Louisiana | Fair | 1925 | 101 | 9,002 |
| CREEK | Louisiana | Fair | 1925 | 101 | 422 |
| CREEK | Louisiana | Good | 1926 | 100 | 23,405 |
| AT JONES | Louisiana | Fair | 1926 | 100 | 1,405 |
| CREEK | Louisiana | Good | 1926 | 100 | 1,405 |
| GUYTON CREEK | Louisiana | Fair | 1926 | 100 | 1,350 |
| CREEK | Louisiana | Fair | 1926 | 100 | 597 |
| CREEK | Louisiana | Poor | 1926 | 100 | 525 |
| STREAM NO NAME | Louisiana | Good | 1926 | 100 | 21,189 |
| DRAIN | Louisiana | Poor | 1927 | 99 | 890 |
| DRAIN | Louisiana | Fair | 1927 | 99 | 15,627 |
| KCS RR | Louisiana | Poor | 1927 | 99 | 11,856 |
| BRANCH | Louisiana | Fair | 1927 | 99 | 467 |
| BRUSHY BRANCH | Louisiana | Fair | 1927 | 99 | 2,151 |
| DRAIN | Louisiana | Fair | 1927 | 99 | 2,151 |
| BEARD BRANCH | Louisiana | Fair | 1928 | 98 | 457 |
| DRAINAGE CANAL | Louisiana | Fair | 1928 | 98 | 6,422 |
| FARMERS L & C CO. CANAL | Louisiana | Fair | 1928 | 98 | 112 |
| DRAINAGE CANAL | Louisiana | Poor | 1928 | 98 | 3,974 |
| DRAINAGE CANAL | Louisiana | Fair | 1928 | 98 | 3,268 |
| GAMM RD EXT. DOOLEY BAYO | Louisiana | Fair | 1929 | 97 | 98 |
| BURNEY BRANCH | Louisiana | Fair | 1929 | 97 | 2,368 |
| CREEK | Louisiana | Poor | 1929 | 97 | 525 |
| CREEK | Louisiana | Poor | 1929 | 97 | 525 |
| DUGDEMONA RIVER | Louisiana | Poor | 1929 | 97 | 4,317 |
| PINEY WOODS CREEK | Louisiana | Fair | 1929 | 97 | 1,348 |
| POPE CREEK | Louisiana | Fair | 1929 | 97 | 1,348 |
| CHEF MENTEUR PASS | Louisiana | Poor | 1930 | 96 | 1,215 |
| SANDAGER CANAL | Louisiana | Poor | 1930 | 96 | 6,242 |
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.