59 STAT.] MEXICO-WATER UTILIZATION- Feb. 3 19 4 4 Nov.14,1944 an average amount in cycles of five consecutive years, than 350,- 000 acre-feet (431,721,000 cubic meters) annually. The United States shall not acquire any right by the use of the waters of the tributaries named in this subparagraph, in excess of the said 350,000 acre-feet (431,721,- 000 cubic meters) annually, ex- cept the right to use one-third of the flow reaching the Rio Grande (Rio Bravo) from said tributaries, although such one- third may be in excess of that amount. (d) One-half of all other flows not otherwise allotted by this Article occurring in the main channel of the Rio Grande (Rio Bravo), including the con- tributions from all the un- measured tributaries, which are those not named in this Article, between Fort Quitman and the lowest major international stor- age dam. In the event of extraordinary drought or serious accident to the hydraulic systems on the measured Mexican tributaries, making it difficult for Mexico to make avail- able the run-off of 350,000 acre- feet (431,721,000 cubic meters) annually, allotted in subparagraph (c) of paragraph B of this Article to the United States as the mini- mum contribution from the afore- said Mexican tributaries, any de- ficiencies existing at the end of the aforesaid five-year cycle shall be made up in the following five-year cycle with water from the said measured tributaries. Whenever the conservation capacities assigned to the United States in at least two of the major international reservoirs, including the highest major reservoir, are filled with waters belonging to the promedio y en ciclos de cinco afos consecutivos, de 431 721 000 metros cubicos (350 000 acres pies) anuales. Los Estados Unidos no adqui- riran ningdn derecho por el uso de las aguas de los afluentes mencionados en este inciso en exceso de los citados 431 721 - 000 metros cubicos (350 000 acres pies), salvo el derecho a usar de la tercera parte del escurrimiento que llegue al rio Bravo (Grande) de dichos aflu- entes, aunque ella exceda del volumen aludido. d) La mitad de cualquier otro escurrimiento en el cauce principal del rio Bravo (Grande), no asignado especificamente en este Articulo, y la mitad de las aportaciones de todos los afluen- tes no aforados-que son aqu6llos no denominados en este Artfculo-entre Fort Quit- man y la presa inferior principal internacional. En casos de extraordinaria sequia o de serio accidente en los sistemas hidraulicos de los afluen- tes mexicanos aforados que hagan dificil para Mexico dejar escurrir los 431 721 000 metros cubicos (350 000 acres pies) anua- les que se asignan a los Estados Unidos como aportaci6n minima de los citados afluentes mexicanos, en el inciso c) del parrafo B de este Articulo, los faltantes que existieren al final del ciclo aludido de cinco anos, se repondran en el ciclo siguiente con agua proce- dente de los mismos tributaries. Siempre que la capacidad fitil asignada a los Estados Unidos de por lo menos dos de las presas internacionales principales, inclu- yendo la localizada mas aguas arriba, se Ilene con aguas pertene- 1227
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