
Southwest Pass defines this coastal landscape where the Mississippi River delta meets the Gulf of America. This 2025 survey illustrates the modern configuration of critical shipping channels and coastal marshes at the very tip of Plaquemines Parish. The map documents the relationship between major waterways like West Bay and smaller distributary features such as Outlet E-1 and Burrwood Bayou. These features represent the dynamic nature of Louisiana’s southern coastline, where land and water constantly shift. The lack of terrestrial infrastructure underscores the environmental significance of this maritime frontier, focused entirely on the navigation routes and wetlands that characterize the modern delta.
5 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1893 · East Delta
USGS Topo · 1:62,500
1893 · West Delta
USGS Topo · 1:62,500
1935 · South Pass
USGS Topo · 1:31,680
1946 · Pass Du Bois
USGS Topo · 1:31,680
1946 · Mudpan Bayou
USGS Topo · 1:31,680
1947 · Southwest Pass
USGS Topo · 1:31,680
1949 · Burrwood
USGS Topo · 1:31,680
1952 · Southwest Pass
USGS Topo · 1:62,500
1953 · West Delta
USGS Topo · 1:62,500
1954 · Pass Du Bois
USGS Topo · 1:31,680