2024 Map of Timbalier Island

About this map

Timbalier Island and its surrounding barrier islands stand at the edge of the Gulf of Mexico, forming a critical boundary between the open sea and the inner coastal bays. This 2024 survey captures the fragmented geography of the Louisiana coast, where islands like Brush Island, Caillou Island, and the Pelican Islands navigate the shifting waters of Terrebonne Bay and Timbalier Bay. The map reveals the precise maritime dividing lines of the Terrebonne Parish and Lafourche Parish boundary as it cuts through these coastal waters. Navigational channels and natural openings such as Caillou Pass and Little Pass Timbalier are clearly delineated, illustrating the complex hydrology of the region. The map provides a detailed view of the township and range survey lines that overlay this largely aquatic landscape, useful for understanding land claims in an area dominated by tides and currents.