2018 Map of Timbalier Island

About this map

Timbalier Island and the surrounding barrier landscape define the southern edge of the Mississippi River delta in this 2018 survey. The map details the fragile geography of the Louisiana coast, where the waters of the Gulf of Mexico meet the interior estuaries of Terrebonne Bay and Timbalier Bay. Notable landforms include Caillou Island, Brush Island, and the Pelican Islands, which serve as vital buffers between the open sea and the mainland. The parish boundary between Terrebonne Parish and Lafourche Parish is clearly delineated, bisecting the open water near Casse-tete Island. This sheet provides an essential record of maritime passage points like Caillou Pass and Little Pass Timbalier, critical for understanding the evolving shoreline and coastal navigation routes in the early 21st century.