1952 Map of Union Island

About this map

The delta landscapes of Union Island and the Stewart Tract are defined by a complex web of natural sloughs and engineered waterways in the mid-20th century. This survey reveals how the land was organized by the historic El Pescadero (Pico and Naglee) Grant Line, where the reclaimed delta soils supported intensive agriculture and early industrial development. Near the southern edge of the quadrangle, the industrial footprint is marked by the Sugar Refinery and a Sewage Disposal plant, both adjacent to the Southern Pacific railroad line. Local education and community life are anchored by rural schoolhouses such as the David Bixler Sch, Naglee School, and North School. The map captures the delicate balance between the flow of the Old River and the Fabian and Bell Canal, essential for managing the water levels of this fertile San Joaquin County region.