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<br />;:.-,:'> ,'':,,::i-> ,._,;'"~ ~ :, <br /> <br />~ <br />0) <br />1:'- <br /> <br />, , ~/ <br /> <br />C_') <br />c:',) <br /> <br />:;." <br />" <br />t <br />[ <br />i~ <br />!' <br />~ <br />, <br /> <br />" <br />~,,", <br />.- <br /> <br />f:o' <br />?: <br />" <br />" <br />-, <br />t.~ <br /> <br />',:.! <br />,(. <br />i..(.~ <br />'1 <br /> <br />..",,"'--:~"~"~'---"'~' ., ..,. .."'" <br /> <br />16 <br /> <br />RIO GRANDE COMPACT COMMISSION REPORT <br /> <br />EVAPORATION LOSSES {!,~, l2 <br /> <br />The Commission shall encourage the equipping, maintenance and 'operation, in <br />cooperation with the U.S. Weather Bureau or other appropriate agency, of evaporation sta- <br />tions at Elephant Butte Reservoir and at or near each major reservoir. in the Rio Grande <br />Basin within Colorado constructed after 1937 and in New Mexico constructed after 1929. <br />The net loss by evaporation from a reservoir surface shall be taken as the difference <br />between the actual evaporation loss and the evapo-transpiration losses which would have <br />occurred naturally, prior to the construction of such reservoir. Changes in evapo-transpira- <br />tion losses along stream channels below reservoirs may be disregarded. <br /> <br />Net losses by evaporation, as defined above, shall be used in correcting Index <br />Supplies for the operation of reservoirs upstream from Index Gaging Stations as required by <br />the provisions of Article III and Article IV of the Compact. <br /> <br />In the application of the provisions of the last unnumbered paragraph of Article VI <br />of the Compact: <br /> <br />(a) Evaporation losses for which accrued credits shall be reduced shall be taken <br />as the difference between the gross evaporation from the water surface of Elephant Butte <br />Reservoir and rainfall on the same surface, <br /> <br />(b) Evaporation losses for which accrued debits shall be reduced shall be taken <br />as the net loss by evaporation as defined in the first paragraph. <br /> <br />ADJUSTMENT OF RECORDS <br /> <br />The Commission shall keep a record of the location, and description of each gag- <br />ing station and evaporation station, and, in the event of change in location of any stream <br />gaging station for any reason, it shall ascertain the increment in flow or decrease in flow <br />between such locations for all stages. Wherever practicable, concurrent records shall be <br />obtained for one year before abandonment of the previous station. <br /> <br />NEW OR INCREASED DEPLETIONS <br /> <br />In the event any works are constructed which alter or may be expected to alter the <br />flow at any of the Index Gaging Stations mentioned in the Compact, or which may otherwise <br />necessitate adjustments in the application of the schedules set forth in the Compact, it shall <br />be the duty of the Commissioner specifically concemed to file with the Commission all avail- <br />able information pertaining thereto, and appropriate adjustments shall be made in accor- <br />dance with the terms of the Compact; provided, however, that any such adjustments shall in <br />no way increase the burden imposed upon Colorado or New Mexico under the schedules of <br />deliveries established by the Compact. <br /> <br />TRANSMOUNTAIN DIVERSIONS <br /> <br />In the event any works are constructed for the delivery of waters into the drainage <br />basin of the Rio Grande from any stream system outside of the Rio Grande Basin, such <br />waters shall be measured at the point of delivery into the Rio Grande Basin and proper <br />allowances shall be made for losses in transit from such points to the Index Gaging Station <br />on the stream with which the imported waters are comingled. <br /> <br />l! Amended at Tenth Annual Meeting, February 15,1949. <br /> <br />~ Amended at Twelfth Annual Meeting, February 24, 1951. <br /> <br />fJi Amended June 2, 1959, <br /> <br />"f ~.~ _~~:1~^o.~~';, l~ <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />_. ,"'o."-':W.' <br />