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<br />September <br />October <br />November <br />December <br /> <br />3,270 <br />1,090 <br />540 <br />o <br /> <br />Annual Total <br /> <br />60,000 <br /> <br />In the event that "extraordinary droughf or "serious accident to the irrigation system in the <br />United States" occurs, the water delivered to Mexico can be reduced in the same proportion as <br />the water delivered to the irrigated lands in the United States is reduced. Extraordinary drought <br />and serious accident are not defined in the treaty. <br /> <br />Article III provides that water will be delivered to Mexico without cost. The United States, <br />consequently, is responsible for the storage, conveyance, and measurement. <br /> <br />In Article IV, Mexico waived any claims for waters in the Rio Grande between the head <br />of the Acequia Madre and Fort Quitman and also settled all prior and subsequent claims for <br />damages as the result of diversion of Rio Grande waters by United States' citizens. <br /> <br />Rio Grande ComDact of 1938 <br /> <br />Interstate Controversies Leadina to the ComDact. The interstate controversies that <br />existed in the upper Rio Grande basin from the 1890s until the late 1930s initially involved <br />Colorado's desire to construct storage reservoirs and the fear of the downstream interests that <br />such reservoirs would deplete the flow of the river. As previously mentioned, the development <br />of any significant reservoir storage was prevented by the embargo of 1896 since any such <br />development would involve Federal land. In Colorado's view, this situation was not equitable. <br />Colorado's major irrigation development had occurred by 1890 and reservoir storage facilities <br />were necessary to regulate the water supply that was already being used so that it could be <br />made available over time to match the crop irrigation requirements.2J In contrast, the major <br />irrigation development had occurred in the Rio Grande Project area in the 1910s after the <br /> <br />2j Approximately two-thirds of the total irrigation season water supply on the Rio Grande in the San Luis <br />Valley occurs during May and June. Substantially more than one-half of the irrigation requirements occur <br />after June. <br /> <br />3-6 <br /> <br />(':: ...,. n <br />'j \. . I....J <br />