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<br />RIO GRANDE COMPACT <br />March 18, 1938 <br /> <br />Signatory States: Colorado, New Mexico, and Texas <br /> <br />Colorado Commissioner: State Engineer <br /> <br />Major Purposes: <br /> <br />I. To remove all cause of present and future controversy between the states concerning the waters <br />of the Rio Grande above Ft. Quitman, Texas (preamble) <br /> <br />2. To promote interstate comity (preamble) <br /> <br />3. To effect an equitable apportionment of the waters of the Rio Grande above Ft. Quitman, Texas <br />(preamble) <br /> <br />Salient Provisions: <br /> <br />I. Rio Grande Basin means all of the territory drained by the Rio Grande and its tributaries in <br />Colorado, New Mexico and Texas. <br /> <br />2. The Commission shall cause to be maintained and operated, among others, the following stream <br />gaging stations: (Art. II) <br /> <br />a. Rio Grande near Del Norte above the principal points of diversion to the San Luis Valley <br />b. Conejos River near Mogote <br />c. Los Pinos River near Ortiz <br />d. San Antonio River at Ortiz <br />e. Conejos River at its mouth near Las Sauses <br />f. Rio Grande near Lobatos <br />g. Automatic water stage recorders on all reservoirs constructed after 1929, as well as stream <br />gaging stations below such reservoirs. <br /> <br />3. Colorado is obliged to deliver at Lobatos the sum of the amounts set forth in the delivery <br />schedules for the Conejos River and the Rio Grande less 10,000 acre-feet. The Conejos Index <br />Supply includes the San Antonio River and Los Pinos River flows for the months April through <br />October. These schedules require zero delivery for an index of 100,000 acre-feet, up to 68 % <br />delivery for an index of 700,000 acre-feet on the Conejos, and 30% delivery for an index of <br />200,000 acre-feet, and up to 60% delivery for an index of 1,400,000 acre-feet on the Rio <br />Grande (see attached graph). (Art. lID <br /> <br />4. If the Closed Basin is used for delivery of water to the Rio Grande, the water must contain no <br />more than 45 % sodium ions in the total positive ion count when total dissolved solids exceed 350 <br />ppm. (Art. lID <br /> <br />8 <br /> <br />.i;", ' ". _ ,~"" Ald>, <br /> <br />t,' <br />~__, Jr <br />-::to ,c\<. <br />. ',~ <br />