Drainage Basins In South California.
As settlement in the western states and territories continued a continual theme developed of the importance of water. This map from a set that looked at potential water districts based on regional drainages began to wrestle with this matter and look for regional solutions. Here, the regions that could potentially have been created for the California, spanning from Stockton, down to San Diego.
Condition is good with some hand color and a close lower left margin. Image size is approximately 14.75 x 13.5 (inches)