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1950 Map of Derniere

Name: 1950 Topographic Map of Derniere
Creator: U.S. Geological Survey
Published: 1950
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1950

About this map

The Isles Dernieres barrier islands and the expansive coastal marsh of Terrebonne Parish are depicted here as they existed prior to decades of significant erosion and land loss. This mid-century survey, based on aerial photography by the Air Corps and U.S. Army, shows a complex network of waterways including Grand Pass Des Ilettes and Whisky Pass that separate the gulf-facing islands from the interior.

Small coastal settlements like Pelican, Villette, and Bague are noted along the margins of Pelican Lake and Lake Pelto. The map provides an essential baseline for understanding the changing geomorphology of the Louisiana coast, illustrating the original extent of landforms such as Whisky Island and the intricate bayou systems of Grand Sale Bayou and Pelican Bayou before they were further subdivided by rising tides and tropical storms.