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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 09/06/2014.

  • The current cycle began on October 25, 2010.
  • The pro-rated deficit as of 09/06/2014 is 386,984 AF for this cycle, which is an increase from the 385,992 reported in the 08/30/2014 report.
  • 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 185,178 AF for the fourth year.
  • The running total of deliveries for this 5-year cycle is 966,030 AF.
  • On September 6, 2014, the U.S. combined ownership at Amistad/Falcon stood at 38.60% of normal conservation capacity, impounding 1,309,297 acre-feet, up from 30.47 % (1,033,655 AF) of normal conservation a year ago at this time.
  • Since January 1, 2014, we have accepted 28,984 AF of water from the San Juan. Of that water, 23,525.03 AF has been "No-Charge" and 5,458.97 AF has been "Charged."
  • The United States has 979,338 AF in Amistad and 329,959 AF in Falcon.
  • Mexico has 313,745 AF in Amistad and 359,955 AF in Falcon.
  • The Amistad Reservoir is currently at: 1075.34 ft -41.66 with a release of 20.0 cms/706 cfs
  • Falcon Reservoir is currently at: 267.58 ft -33.62 with a release of 2.0 cms/70 cfs

Ownership of Water – Amistad/Falcon

Report dated 9/13/2014.

On September 13, 2014, the U.S. combined ownership at Amistad/Falcon stood at 39.51% of normal conservation capacity, impounding 1,340,104 acre-feet, up from 30.64 % (1,039,330 AF) of normal conservation a year ago at this time. Overall the system is holding 34.11 % of normal conservation capacity, impounding 2,020,289 acre-feet with Amistad at 40.47% of conservation capacity, impounding 1,325,511 acre-feet and Falcon at 26.25% of conservation capacity, impounding 694,778 acre-feet. Mexico has 26.88% of normal conservation capacity, impounding 680,186 acre-feet at Amistad/Falcon.

Resolutions

Letters Pertaining to Mexican Water Deficit

IBWC's Minute 309 and Letters