1949 Map of Grand Island Pass

About this map

Lake Borgne L. H. stands at the transition between protected inland waters and the open Mississippi Sound in this mid-century survey of the coastal Louisiana-Mississippi line. The map highlights the shifting interface of water and marshland, centered on the complex landform of Grand Island and the navigable Grand Island Pass. This advance sheet was compiled from aerial photographs taken by the Air Corps, documenting the precise configuration of marshy islets like Grassy Id and the winding course of West Bayou before subsequent decades of coastal erosion. The maritime importance of the area is underscored by the prominence of Lower Pt Clear and the jurisdictional divide between Hancock County and St. Bernard Parish, marking a remote and environmentally dynamic stretch of the Gulf Coast.