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COSTILLA CREEK COMPACT <br />(§37-68-101, et. seq., C.R.S.) <br />September 30, 1944 <br />(Amended February 7, 1963) <br />Signatory States: Colorado and New Mexico <br />Colorado Commissioner: State Engineer <br />Major Purposes: <br />1. Equitable division of the waters of Costilla Creek (Art. I) <br />2. Remove present and future causes of interstate controversy (Art. I) <br />3. Assure the most efficient utilization of water (Art. I) <br />4. Provide for integrated operation of existing and prospective irrigation facilities in the <br />two states (Art. I) <br />5. Adjust conflicting jurisdictions of the two states over irrigation works diverting and <br />storing water in one state for use in both states (Art. I) <br />6. Equalize benefits of water from Costilla Creek (Art. I) <br />7. Place the beneficial application of water on an equal basis in both states (Art. I) <br />Important Provisions: <br />1. Provides for the calculation of a safe yield prior to delivery of water each year. (Art. <br />II) <br />2. Defines an irrigation season (May 16 - Sept. 30) and a storage season (Oct. 1 - May <br />15). (Art. II) <br />3. Establishes a duty of water of one cubic -foot per second for each 80 acres of land <br />irrigated. (Art. 111) <br />4. Involves the relinquishment of Colorado water rights and the change of decreed <br />amounts. (Art. III) <br />5. Establishes schedules of delivery to each state based on water available. (Art. V) <br />6. Prohibits direct flow diversions during the storage season. (Art. V) <br />