1904 Map of Pomona

About this map

The San Gabriel National Forest dominates the northern landscape of this map, its steep canyons like Roberts Canyon and Graveyard Canyon feeding into the massive San Gabriel Wash. This early century survey illustrates the expansion of the citrus belt and agricultural valley before the mid-century suburban boom. Water infrastructure, critical to the region's development, is clearly marked through the Azusa Ditch and Covina Canal, which diverted mountain runoff to the growing settlements below.