This collection contains documents about Cyrus Grandison Baldwin's involvement with water issues in the Pomona Valley and San Bernardino Mountains from 1897-1937.

This collection of contains documents about water rights and water supply in California from 1930-1957 and two documents related to water use in New Mexico from 1925-1957.

This collection of papers was assembled by Jeffry Pendergast. The Prendergast papers include documents about water rights and water supply in California from 1944-1962. Subjects include California Division of Water Resources, Metropolitan Water District of Southern California, and the Areas/Counties of Origin. The area of origin statutes represent a legislative response in California to an absense of an effective for market pricing water.