2012 Map of Jacko Bay

About this map

Jacko Bay and the vast marshlands of Terrebonne Parish are captured here during a period of significant coastal flux in the early 21st century. This 2012 survey by the U.S. Geological Survey documents the fragile relationship between the Louisiana coastline and the Gulf of Mexico, focusing on a landscape dominated by water and shifting landmasses. The map traces the intricate boundaries of Lake Barre and the winding course of Bayou l'Ourse as they meet the open sea. Numerous small island chains, including the Fornation Islands, Cat Island, and Bull Islands, serve as critical markers of the state's receding shoreline. For those studying environmental change or maritime history, this document provides a specific record of land extent at Terrebonne Island before further erosion and sea-level changes altered these coordinates.