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u02G52 . WYOMING* . , Authorized - 2 Control .. 0 Compilation - 8 Published - 0 Compilation copy is available on 8 quadrangles in the South Pass project. Basic control was started on the Granger project. *Information given on these states is for only that portion falling wi thin the boundary of the Pacific Southwest area. Wate~resources investigations Streams and runoff.- During the report period, runoff was above : median over a considerable part of the area, especially in the upper Colorado River basin where it averaged about 135 percent of median. stor- age in major reservoirs was above average at the end of the period. Collection of streamflow records continued, largely in cooperation between the Geological Survey, the states, and Federal agencies. Changes in the station network include the following: (1) In Arizona, new stations on Alchesay Spring near Wbi teriver, Cave Creek neal,' Cave Creek, and Cibecue 1. and? near Show Low; the latter two are for ~'esearch in land use. (2) In Gali.!-ornia, 14 new stations. (3) In ~!sw Mexico, 3 new crest-stage gages nflar Silver City, a new cableway on La Plata River near Farmington, and an a.rtificial control at the relocated station on San Vicente Arroyo at Silver City. (4) In Utah, 3 new stations in the Ogden River basin. Compilation of streamflow records through 1950 is in the clean-Up stage. The repqrt on the recent prolonged drought in the Southwest has been transmitted for editorial review and publication. Interpretive and hydrologic studies were continued on diverse topics, including the following which have not been reported previously: (1) "Arizona's water," a sUlll!llary report on water conditions over the State, is in final draft; this is one of several pilot reports in a contemplated new series of publications. (2) In California, the '"Nater SUIlI!llary for Southern CalifoX'hia" 1957" was completed and scheduled for publication. A sunnnary report on water conditions in the Los Angeles area is nearly com- plete; this is anoth~ pilot study. Selected data on daily streamflow that had been punched 0'I'l tape were fed into the Datatron computer to determ- ine lair-flow means and, monthly discharge. (3) In Idaho-utah, the 'IBear River Hydrometrio Data, Tri-8tate Investigations, l~n were releas'~d and those for 1957 were transmitted for approval. The Bear River Compact was signed Maroh 17; under the compact, collection of data and certain admin- istrative functions will be by the Geologioal Survey. (4) In New Mexioo, a report was made on flood-flow characteristios at a proposed bridge site on the San Juan River at Blanco. Ground water.- Colleotion of basic data and mapping of pertinent geologie features contirlued, largely in problem areas. Note"TOrthy area investigations not previously repor-ted j.ncludel (1) In Arizona, lower San Pedro basin, Snowflake-Taylor region, Apache County south of the Javajo Indian Reservatton, and McMUllen Valley. A report on the Bonita Creek area ';; 7. ,