2015 Map of Timbalier Island

About this map

Timbalier Island and the surrounding barrier landscape of the Gulf Coast are documented here during a period of significant coastal change. This maritime environment is defined by the separation of Terrebonne Bay and Timbalier Bay from the open Gulf of Mexico. The map details a series of vulnerable landforms, including Caillou Island, Brush Island, and the Pelican Islands, which serve as a critical buffer for the interior Louisiana marshes. For researchers of coastal geomorphology, the depiction of Caillou Pass and Little Pass Timbalier provides a precise record of the inlets and water depths as they existed in the mid-2010s. The boundary between Terrebonne Parish and Lafourche Parish bisects these waters, illustrating how political jurisdictions are maintained even across shifting aquatic environments.