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<br />., ~ <br />pi <br />"'I <br />:~ <br />'1j ~"j <br />;'~ ~."., <br />,." i~;'f <br />, 'I' <br />(;..... <br />( ) <br /> <br /> <br />_<0___'- ':""'_"."0.'",, <br /> <br />RULES AND REGULATIONS <br /> <br />21 <br /> <br />(b) Excess, releases from Elephant Butte Reservoir, as <br />defined in (a) above, shall be added to the quantity of <br />water actually in storage in that reservoir, and Actual <br />Spill shall be deemed to have commenced when this sum <br />equals the total physical capacity of that reservoir, to <br />the level of the uncontrolled spillwah i.e.-2,219,000 acre- <br />ft in 1942. <br /> <br />(c) All water actually spilled at Elephant Butte <br />Reservoir, or released therefrom, in excess of Project <br />requirements, which is currently passed through Caballo <br />Reservoir, after the time of spill, shall be considered as <br />Actual Spill, provided that the total quantity of water <br />then in storage in Elephant Butte Reservoir exceeds the <br />physical capacity of that reservoir at the level of the sill <br />of the spillway gates, i.e. -1,830,000 acre-ft in 1942. <br /> <br />(d) Water released from Caballo Reservoir in excess <br />of Project requirements and in excess of water currently <br />released from Elephant Butte Reservoir, shall be deemed <br />Usable Water released, excepting only flood water entering <br />Caballo Reservoir from tributaries below Elephant Butte <br />Reservoir. <br /> <br />~;.. <br /> <br />DEPARTURES FROM NORMAL RELEASES il. <br /> <br />For the purpose of computing the time of Hypothetical <br />Spill required by Article VI and for the purpose of the <br />adjustment set forth in Article VII, no allowance shall <br />be made for the difference between Actual and Hypothetical <br />Evaporation, and any under-release of usable water from <br />Project Storage in excess of 150,000 acre-ft in any year <br />shall be taken as equal to that amount. <br /> <br />EVAPORATION LOSSES Li, ~, ~ <br /> <br />The Commission shall encourage the equipping, main- <br />tenance and operation, in cooperation with the U.S. Weather <br />BUreau or other appropriate agency, of evaporation stations <br />at Elephant Butte Reservoir and at or near each major <br />reservoir in the Rio Grande Basin within Colorado construc- <br />ted after 1937 and in New Mexico constructed after 1929. <br />The net loss by evaporation from a reservoir surface shall <br />be taken as the difference between the actual evaporation <br />loss and the evapo-transpiration losses whicL would have <br />occurred naturally, prior to the construction of such <br />reservoir. Changes in evapo-transpiration losses along <br />stream channels below reservoirs may be disregarded. <br /> <br />3 Adopted June 2, 1959; made effective January 1, 1952. <br />4 Amended at Tenth Annual Meeting, February 15, 1949. <br />5 Amended at TWelfth Annual Meeting, February 24, 1951. <br />6 Amended June ~ lq~q <br /> <br />I~'''~';<-'''''~h'~-''..'''''.'''~~c.....;;;..' <br /> <br /> <br />