1941 Map of Prado

About this map

The Santa Ana River carves a winding path through this 1930s landscape, just before the construction of the Prado Dam altered the local geography. The settlement of Prado sits at a critical junction near the confluence of Chino Creek and Mill Creek, surrounded by a network of early California ranching and agriculture. The map illustrates the complex infrastructure of the era, from the sprawling irrigation of the Cañon de Santa Ana to the industrial presence of the Gypsum mine. Significant institutional landmarks are noted, including the Junior Republic School and the Pioneer Sch. Transportation is dominated by the competing steel of the Union Pacific and the Atchison Topeka and Santa Fe (Coast Lines), which follow the river's natural corridor through the Puente Hills. Smaller ranching sites like Pellissier Ranch and the Los Serranos Country Club reflect the transition from open land to developed social and commercial spaces.