2018 Map of Cat Island Pass

About this map

Timbalier Island and the neighboring barrier islands form a critical buffer between the open Gulf of Mexico and the interior marshes of Terrebonne Parish. This maritime landscape is defined by its shifting shoals and the deep channel of Cat Island Pass, a vital corridor for watercraft moving between the gulf and the sheltered waters of Terrebonne Bay. The map highlights the isolated character of Wine Island, illustrating the fragile coastal topography that characterizes Louisiana's southern frontier. As a study of the interplay between currents and land, the survey reveals a geography in constant flux, where small landmasses serve as the final outposts against the sea. This record captures the precise orientation of these barrier features before further coastal erosion or storms can reshape the seafloor and shoreline profile.