1967 Map of Bonnett Carre NE

About this map

Lake Pontchartrain dominates this hydrographic study, providing a detailed record of the offshore environment in the late 1960s. The map captures the open water and navigational hazards through the placement of numerous lights, which helped guide maritime traffic across this expansive bay. These markers were essential for vessels transiting the waters between several parish boundaries that converge here, including those of St. Charles, Tangipahoa, and St. John the Baptist Parish. The inclusion of depth curves and soundings, based on data from the Usc&GS, illustrates the underwater topography at a time when the region was actively monitored for subsidence. This documentation is a precise record of the lake's shoreline and water depths before subsequent decades of coastal change.