2020 Map of Calumet Island

About this map

East Timbalier Island stretches along the southern edge of this coastal survey, serving as a critical barrier between the open Gulf of Mexico and the protected waters of Timbalier Bay. This 2020 map documents the highly dynamic environment of Lafourche Parish's outer coastline, where narrow landmasses like Casse-tete Island and Calumet Island dot the tidal landscape. The map provides a clear look at the Public Land Survey System grid through township markers t23s r21e and t24s r21e, showing how human administrative boundaries persist even across this changing maritime geography. Researchers of coastal erosion and Louisiana's shifting wetlands will find the precise 2020 shoreline and island positions essential for comparing historical land loss in the bay.