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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 08/2/2014.

    • The current cycle began on October 25, 2010.
    • The pro-rated deficit as of 08/2/2014 is 366,596 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 172,004 AF for the fourth year.
    • The running total of deliveries for this 5-year cycle is 952,856 AF.
    • On August 2, 2014, the U.S. combined ownership at Amistad/Falcon stood at 40.90% of normal conservation capacity, impounding 1,387,125 acre-feet, up from 31.53 (1,069,326 AF) of normal conservation a year ago at this time.
    • The Mexican Reservoirs report shows, as a whole, a total of 52.4% average capacity. All reservoirs are under 100% capacity at this time.
    • As of 08/2/14, the United States has 985,823 AF in Amistad and 401,301 AF in Falcon.
    • Mexico has 297,531 AF in Amistad and 403,734 AF in Falcon.
    • The Amistad Reservoir is currently at: 1075.00 ft -42.00 with a release of 20.0 cms/706 cfs
    • Falcon Reservoir is currently at: 270.07 ft -31.13 with a release of 55.0 cms/1,942 cfs

Ownership of Water – Amistad/Falcon

Report dated 8/9/2014.

On August 9, 2014, the U.S. combined ownership at Amistad/Falcon stood at 40.13% of normal conservation capacity, impounding 1,361,182 acre-feet, up from 31.33% (1,062,841 AF) of normal conservation a year ago at this time. Overall the system is holding 34.70 % of normal conservation capacity, impounding 2,055,150 acre-feet with Amistad at 39.20% of conservation capacity, impounding 1,284,165 acre-feet and Falcon at 29.13% of conservation capacity, impounding 770,985 acre-feet. Mexico has 27.42% of normal conservation capacity, impounding 693,968 acre-feet at Amistad/Falcon.

Resolutions

Letters Pertaining to Mexican Water Deficit

IBWC's Minute 309 and Letters