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<br />signed, under the By, Laws of the Administration, to the En- <br />gineering Committce. <br />(b) During the period covered by this report the Administration <br />has had the benefit of excellent cooperation from all agencies <br />and officials referred to in the above provision of the Compact. <br />The United States Geological Survey has proceeded with the <br />establishment and operation of Compact gaging stations, an ac- <br />tivity which is cOVL'rcd in detail in Paragraph 8 of this report. <br />The United Sttltes Geological Survey has also continued the <br />compilation of hyurologic data which are presented in this <br />report and \vhich have bcen utilized in the administration <br />of the Compact. The Corps of Engineers has continued to <br />operate John Martin Reservoir in accordance with the pro' <br />visions of the Ccmpact. <br /> <br />i. 'Valer Supply, Reservoir Operation and Hydrologic Data <br />On November 1, 1950. the beginning of the Compact year con- <br />sidered in this report, the John Martin Reservoir contained 58,500 acre' <br />feet of water. The winter period. as in thc preceding yeilr, again was <br />very dry and there was accumulated in storage only an additional <br />23,000 acrc-feet of. water. Thus, at the beginning of the irrigation season <br />on April 1, 195"1, the reservoir contained 81,500 acre-feet of water. <br />Throughout the irrigation season from April 1, 1951 to October 31, <br />1951, inflow into thc reservoir as measured in t'he Arkan15as and Purga' <br />toire Rivers near Las Animas amounted to 120,400 acre-feet. The total <br />inflow from these sourc.cs during thc Compact ycar was 137,900 acre' <br />feet of which approximately 80% occurred during June, July and Aug' <br />ust. For the second succcssive year, the inflow from the Purgfltoire River <br />exceeded the inflow from the Arkansas River. <br />With the exception of the periods from May 15 to 28 and from <br />June 11 to July 5, Colorado made almost constant demands for w.tter <br />from the reservoir throughout the irrigation season. Kansas demands for <br />water began on May 2 and ended on May 15 follo\ving intense rains <br />and floods along the rivcr downstream from the reservoir. Dcmands for <br />delivery to Kansas wcre resumed on July 28 and continued through <br />Septemher 7. Fl..lrther demand for delivery of water was made by <br />Kansas for the period October 5 to 18 inclusive. Early in the irrigation <br />season the watcr stored in the reservoir was rapidly reduced by the <br />middle of May to 36,500 acre,fect. Frequent storms during the summer <br />months produced freshets sufficient to replenish water supply in storage <br />from time to time with recovery to a maximum amount of 79,800 acre' <br />feet on August 26. Steady demands hy both states rapidly depicted this <br />supply so that at the close of the irrigation season, on October 31,1951, <br />the reservoir contained only 22,800 acre-feet of water. The outflow from <br />the reservoir during the Compact year was 192,000 acre-feet of which <br />approximately 98 ro was released during the irrigation season. <br />The Statcline flow during the Compact year was 267.100 aere- <br />fcet, exceeding the outflow from the reservoir by nearly 40%. More than <br />one-third of the Statcline flov-: occurred during- the month of MilY <br /> <br />8 <br /> <br />, <br />