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002iJ53 ~, . . . near Safford haS been completed but not yet released. A report, "Should the term 'Gila oonglomera te I be abandoned?" was published in Contribution No.7, Program in Geoohronology, Universi W of Arizona Bulletin, January 19,6. (2) In California, a reconnaissance of the U. S. Naval Air Missile Facility, Point Arguello. Open-file reports were released on Butte Valley, Sacra,mento Valley,' Furnace Creek area in Death Valley; a preliminary re- port by the Inter-Agency Committee on Land SUbsidence was ~so released. (3) In Nevada, a repdrt on CreScent Valley, Eureka and Lander Counties, was transmitted for review; a report on Ciuinn River Valley, Humboldt County, was submitted for publication as State of Nevada Water Resources Bulletin 14. (4) In Utah, Pavant Valley in regard to variations in ohemi- cal quality of the water; an open-file report, "The Geology and distribu- tion of aquifers in southeastern San Juan Coanty, Ul:.ah", was released April 1956. (5) Reconnaissance of certain areas in Arizona, Nevada and Wyoming, in relation to possible sites for disposal of radioactive wastes. Chemical quality of water.- Records of dissolved constituents and temperature of streams were oontinued, and one new weekly station was es- tablished on the Weber River, Utah, Throughout the Paoifio Southwest, long strides were made toward rational design of a base network for sampling streams. Chemical quality of ground water was investigated in Arizona, also' '. in the upper l'uerco of the West and the Gila River sub-basins of New Mexico. A report, "Compilation of ohemical quali.1;~r data for ground and surface waters in Utah", was submitted for publiM.tion by the Ut1:.h State Engineer. Sediment._ Sediment records on streamf' have been continued. New stations inolude: (1) In Arizona, daily on the Gila River at Kelvin. in oQoperation with the Bureau of Reclamation; (2) :rn CalifOrnia, 2 daily and 6 periodio in the Nacimiento and San Antonio River basins of the Hunter-Liggett Military Reservation. In the upper Colorado River bas1n two measurements of total sediment load were made in June 1958, in camect:\,on With the hydrolo~o appraisal or that area. 010 c research and s ecial st~dies... New special studies in Arizona nc u el evapora J.on oases y he enertliY-budget method :from SahU$ro Lake, Canyon ~e, Apache :J;.ake 4Ild Roosevelt Reservoir; (2) reoonnaissance to measure the rea$ibiUty of a pllotproje;ct in tll.\l Gotton- wood Wash area, in part to ilinprove method!! of! lI\easuring tl\le useoi water by riparian vegetation..(3) -eontinued e."tic;;!J of! t~ ~ologi!; effects of eradioating pinon-j).Ulipe~ in tlllil Fort Apaohe, J;ncU.l!-l;l ReelilX'Vatiql'l. ~ (4) the etrect of stock reserV'oirs in thlil Arb()~ Str:\,p~ !n t,he upPj)r Colorado River basin." J,!.' comprehensive l1Ydrologic appraisal With special emphaeiscm water quaU.tybegan in A;prill956. 8.