Arrangement: Alphabetical within ten year periods. For letterpress volumes, chronological. The reading files years reflect terms of office of adjudicators.

Microfilm: 1900-1969

Incoming and outgoing correspondence on the daily business of the Board, including information and requests pertaining to water rights tabulations, changes of diversion points, petitions for declaration of abandonment, and water rights. Photos, certificate of water appropriation, affidavits, and reports of the Board may accompany correspondence.

Reading files reflect correspondence of adjudicators during their terms of office.