The surface-water records for t he 1964 water year for gaging st at i ons and miscellaneous si tes within the State of Arizona are given in this report. For convenience there are also included records for a few pertinent gaging stations in bordering States. The records were collected and computed by the Water Resources Division of the U.S. Geological Survey, under the direction of R. M. Babcock, district chief.
This report continues a new method, begun with the 1961 water year, of presenting, annually, basic data on surface-water records by States. Through September 30, 1960, the records of discharge and stage of str eams and contents and stage of lakes or reservoirs were published in an annual series of U.S. Geological Survey water-supply papers entitled "Surface Water Supply of the United States." Since 1951 there have been 20 volumes in the series; each volume covered an area whose boundaries coincided wi th those of certain natural drainage areas. The records in Arizona were contained in Part 9 of that series.
Beginning with the 1961 water year, streamflow records and related data are being released by the Geological Survey in annual reports on a State-boundary basis. Distribution of these basic-data reports will be limited and primarily for local needs.
