The collection dates from Andrew Cohen's tenure on the East Bay Municipal Utility District (EBMUD) Board of Directors, and consists of documents pertaining to the projects and administrative work of the District. The materials consist of meeting minutes, reports, data, planning documents, drafts, policy, correspondence, news clippings.

The collection contains research regarding Blake Gumprecht's book The Los Angeles River: Its Life, Death, and Possible Rebirth. Materials include correspondence, photographs, audio tapes, VHS tapes, and maps. The collection consists of research material dating from the early twentieth century to the early twenty-first century regarding the Los Angeles River and Aqueduct that was utilized by Gumprecht for his book.