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2012 Map of San Dimas

Name: 2012 Topographic Map of San Dimas
Creator: U.S. Geological Survey
Published: 2012
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2012

About this map

The San Jose Hills and the urban landscape of the eastern San Gabriel Valley are meticulously documented in this 2012 survey. Centered on Puddingstone Reservoir, the map illustrates a complex convergence of education, recreation, and suburban infrastructure. Major institutional grounds occupy significant acreage, notably the California State Polytechnic University-Pomona and the Kellogg Arabian Horse Farm. The historic settlement area of Spadra remains visible near Elephant Hill, while the Los Angeles County Fairgrounds and Brackett Field Airport highlight the region's role as a regional hub.

Water management is a defining characteristic of the terrain, with the San Jose Cr Diversion Channel and various washes like Big Dalton Wash and Thompson Wash cutting through the grid of neighborhoods in San Dimas and Walnut. For the local historian, the map preserves the locations of several burial grounds, including the Evergreen Cem and Spadra Cem, providing essential markers for genealogical research in this densely developed corridor.