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<br />ODJ7u6 <br /> <br />4 <br /> <br />in the key well near Flowell was record-low for <br />December. <br /> <br />Nevada.-Runoff in northern Nevada was above <br />median partly as a result of warm temperatures that <br />reduced ice storage. Withdrawals reduced Lake <br />Tahoe storage by 25,000 acre-ft, but other reservoirs <br />had minor increases. Stored water in most of the <br />major reservoirs equaled or exceeded that of a year <br />ago and was well above average. <br /> <br />California.-Runoff continued below median and waf:! <br />deficient in several areas. but reservoir storage con... <br />tinued generally at above average levels. <br /> <br />Arizona.-Runoff was deficient except in the extreme <br />southeast corner which was near median. Discharge <br />of the key station, Little Colorado River near <br />Cameron. was second lowest for December since 1920 <br />and that of the key station, Virgin River near Little- <br />field; was second lowest since 1929. Combined stor- <br />age in Lakes Mead and Mohave decreased to 130 <br />percent of average, 1,169,000 acre-ft more than that <br />a year ago. Storage in the Salt and Verde River <br /> <br />\ <br /> <br />system of reservoirs increased to 893,000 acre-ft, <br />155 percent of average and 436,900 acre-ft more than <br />a year ago. Storage in San Carlos Reservoir decreased <br />to 107,900 acre-ft, 98 percent of average and 49,920 <br />acre-ft more than a year ago. <br /> <br />New, Mexico.-Runoff in the San Juan River basin <br />continued deficient and that in the Rio Grande basin <br />continued to be below median. Conchas Reservoir on <br />the Canadian River and the larger reservoirs on the <br />Pecos River remained nearly full. Actual flow at the <br />key station Rio Grande at Otowi Bridge, as in November, <br />was higher than shown owing to the release during the <br />month of 38,000 acre-ft from EI Vado Reservoir. This <br />release combined with the natural flow of Rio Grande <br />increased the storage in Elephant Butte and Caballo <br />Reservoirs to 1,135,000 acre-ft, 142 percent of the <br />20-year average. <br /> <br />The level in the Dayton key well declined to a record- <br />low stage, but the levels in the other key wells rose <br />slightly. Despite this rise, record-low levels for <br />December were measured in the Lovington and <br />Deming wells. <br /> <br />, <br />\ <br />I <br /> <br />Prepared by O. D. Mussey, E. W. Reed, and]. K. Searcy. <br />Note, -All statements and comparisons concerning storage refer to <br />conditions as of the end of month, unless stated othenv:ise. <br /> <br />, <br />f <br />f <br />; <br />f <br /> <br />NEW GEOLOGICAL SURVEY REPORTS <br /> <br />Bulletin 1071-B. Geologic reconnaissance of San Clements Island, California, by F. H. Olmsted. 1958. <br />p. 55-68, pI. 1. Price, 75c, from the Superintendent of Documents, Washington 25, D. C. <br /> <br />Water-Supply Paper 1429. Reconnaissance of the geology and ground water of the Khorat Plateau, Thailand, <br />by P. E. LaMoreaux and others. 1958. p. 1-62, pIs, 1-9, figs. 1-11. Price, $1.25, from the Superintendent of <br />Documents, Washington 25, D. C, <br /> <br />Circular 407. Floods of June-July 1957 in Indiana, by C. E. Schoppenhorst. 1958. p. 1-32, fig,s. 1-14. <br />Free on application to Geological Survey, Washington 25, D. C. <br /> <br />IIfr._DUP. S!C., IASH_, D.C. ~ 1 ~ 90 <br />