
Southwest Pass defines the slender, marshy strip of land stretching into the Gulf of Mexico at the very edge of the Mississippi River delta. This advance sheet, based on 1935 field examinations and Army Air Corps photography, documents a fragile coastal environment dominated by tidal channels and brackish wetlands. The complex hydrology of the delta is visible through the winding courses of Mudpan Bayou and Burrwood Bayou, which drain the narrow peninsula separating the main pass from the open waters of West Bay.
5 named features on this map. Tap any name to fly to it.
Don’t see what you’re looking for? This feature index may not catch every label — zoom into the map to look around manually.
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
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
1954 · Southwest Pass
USGS Topo · 1:31,680