USGS Quad Maps

WRI Historical USGS Topographic Quadrangle map series for the Santa Ana Watershed

The Joseph Andrew Rowe Water Resources Archives houses a large amount of historical Quadsheets that are informative about past land use and changes in infrastructure.

 

Please contact Archivist Suzie Earp to make an appointment to peruse our USGS Quad maps.

(909) 537-7683