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Water Shortage Issue Related to the Mexican Water Deficit

Documents and information pertaining to the TCEQ's position on Rio Grande water distribution between the United States and Mexico.

 

Issue

The failure of Mexico to consistently deliver water in accordance with the 1944 water treaty between the United States and Mexico significantly harms Texas interests.

The treaty requires delivery from certain tributaries in Mexico to the United States of not less than an average of 350,000 acre feet annually, in cycles of five consecutive years. Mexico has failed to deliver the amount of water owed resulting in hardship for Texas' water users who rely on that water for irrigation, as well as municipalities that need the irrigation water to convey public drinking water supplies.

The International Boundary and Water Commission, in conjunction with the U.S. State Department, has the responsibility to enforce the treaty, but has not been successful in doing so in spite of the fact that the United States has implemented actions to the benefit of Mexico on numerous occasions.

Rio Grande Watermaster Reports

Reservoir Levels

This report is for the week ending 7/12/2014.

  • The current cycle began on October 25, 2010.
  • The pro-rated deficit as of 07/12/2014 is 350,424 AF for this cycle.
  • During the first year of the cycle, Mexico delivered 288,309 AF, during the second year 100,401 AF, during the third year 392,142 AF and to date 168,039 AF for the fourth year.
  • The running total of deliveries for this 5-year cycle is 948,891 AF.
  • On July 12, 2014, the U.S. combined ownership at Amistad/Falcon stood at 42.38% of normal conservation capacity, impounding 1,437,389 acre-feet, up from 31.79 % (1,078,244 AF) of normal conservation a year ago at this time.
  • The Mexican Reservoirs report shows, as a whole, a total of 53.01% average capacity. All reservoirs are under 100% capacity at this time.
  • As of 7/12/14, the United States has 998,795 AF in Amistad and 438,594 AF in Falcon.
  • Mexico has 293,477 AF in Amistad and 419,948 AF in Falcon.
  • The Amistad Reservoir is currently at: 1075.17 ft -41.83 with a release of 30.0 cms/1,059 cfs
  • Falcon Reservoir is currently at: 271.75 ft -29.45 with a release of 30.0 cms/1,059 cfs

Ownership of Water – Amistad/Falcon

Report dated 7/12/2014.

On July 12, 2014, the U.S. combined ownership at Amistad/Falcon stood at 42.38% of normal conservation capacity, impounding 1,437,389 acre-feet, up from 31.79 % (1,078,244 AF) of normal conservation a year ago at this time. Overall the system is holding 36.32 % of normal conservation capacity, impounding 2,150,814 acre-feet with Amistad at 39.45% of conservation capacity, impounding 1,292,272 acre-feet and Falcon at 32.44% of conservation capacity, impounding 858,542 acre-feet. Mexico has 28.19% of normal conservation capacity, impounding 713,425 acre-feet at Amistad/Falcon.

Resolutions

Letters Pertaining to Mexican Water Deficit

IBWC's Minute 309 and Letters