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<br /> <br />. <br /> <br />. <br /> <br />(3) In Colorado. a reconnaissance of North and Middle Parks was begun. <br />(4) In Nevada. a report" Grcl1,lIl1ld-water potentialities in Crescent <br />Valley, Eureka and Lander CO\lll1ltiee. Nevada". by C. P. Zones was placed <br />in open file pending publication. A well-site selection for the Atomic <br />Energy Commission in the vicinity of Groom Lake. north of the Nevada Test <br />Site, was successful. (5) In New Mexico. a reconnaissance report on the <br />southern part of the Jicarilla Reservation is in final review. A report <br />"Reconnaissance of the geology and ground-water resources of the Farmington <br />area. San Juan County. New Mexico". by J. R. RapP. was released to open <br />file. (6) In Utah. study of the Pavant Valley, Millard County and a <br />12.000-foot test-drilling program in central Sevier Valley were begun. <br />Two reports were submitted for review; "Geology and ground-water resources <br />of Jordan Valley. Utah". by I. W.'Marine and Don Price, and "Ground-water <br />hydrology of northern Utah Valley. Utah County. Utah'". by Seymour <br />Subitsky. <br /> <br />Collection of basic data and hydrologic mapping in other problem <br />areas continu'sd. <br /> <br />Chemical--9ual:ity of water:. - The stream-sampling network was <br />enlarged by re-activating four statione~. one station on the Humboldt <br />River, Nevada, one station on the San Joaquin River and two on the <br />Sacramento River. in California. <br /> <br />New starts and completions include: (1) In California. areal <br />studies of the Alameda Creek basin and the Fruitvale Oil Field, also <br />research in quanM.,tative spectrog:l'aphic methods were started, a report <br />on chemical-quality aspects of a San Frandsco Bay Barrier (a study for <br />the Corps of Engineers) is in review'. (2) In Utah. a study of <br />dissolved-constituent contributions to Great Salt Lake was started, :3 <br />weekly and 12 periodio sampling stations were established for the purpose. <br /> <br />Sediment. - One new station for daily record of suspended sediment <br />and temperature was established in the Gila River basin. New Mexico. <br />Other noteworthy changes in program include: (1) In Ari,zona. the trap- <br />efficiency study of Creighton Reservoir on (}Old Gulch. near Bowie. was <br />discontinued. (2) In California. a study was begun on quantity and <br />characteristios of sediment transported by the Delta-Mendota Canal. <br />(3) At Denver. Colorado. a study of the mineralogy of stream sediments. <br />including amount and kinds of clay minerals and ion-exchange capacity of <br />suspended and bed materials. was started, this stu~. of reconnaissance <br />scope. covers two sampli.ng stations on two streams each in northern <br />California and in New Mexico. <br /> <br />Speoial studies. - As one of several cooperating agencies. Federal <br />and State. the Geological Survey began its part of a 5-year comprehensive <br />study of the hydrology of the Humboldt River Valley in the vicinity of <br />Winnemucca. Nevada. This will giwe particular attention to use of water <br />by phreatoRhytes. as outlined below. <br /> <br />-s- <br />