Surface-water records for the 1970 water year for gaging stations, partial-record stations, and miscellaneous sites within the State of Idaho are given in this report and their locations shown in figures 2 and 3. Records for a few selected gaging stations in bordering States also are included. The records were collected and computed by the Water Resources Division of the U.S. Geological Survey, under the direction of W. L. Burnham, district chief, Water Resources Division.
Through September 30, 1960, the records of discharge and stage of streams 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 with those of certain natural drainage areas. The records in Idaho were contained in Parts 10, 12, and 13 of that series.
Beginning with the 1961 water year, streamflow records and related data have been released by the Geological Survey in annual reports on a State boundary basis. Distribution of these basic-data reports is limited; they are designed primarily for rapid release of data shortly after the end of the water year to meet local needs. The discharge and reservoir-storage records are also being published at 5-year intervals in a Geological Survey water-supply paper series entitled "Surface Water Supply of the United States." These papers which show daily discharge and storage figures are compiled on the same geographical areas used for the annual series published through September 30, 1960. The daily records for 1961-65 are compiled in Water-Supply Papers 1927 (Part 10), 1933 (Part 12), and 1934 (Part 13).
