The International Boundary & Water Commission, United States Section
Updated Rio Grande National Ownership of Waters
Stored At The International Amistad and Falcon Dams
Determination of ownership in the reservoirs is made weekly for the accounting period ending on each Saturday at midnight. Field data collections, exchange of data between the U.S and Mexico, and computation of national ownerships are usually completed by Thursday afternoon or Friday morning of the following week. Data are PRELIMINARY and subject to REVISION.
Estimated ownership @ 2400 hours on 05/11/2013
31.6% of U.S. Total Conservation Capacity
7.9% of Mex. Total Conservation Capacity
Amistad Dam
Water Surface Elevation Feet Meters
Top of Normal Conservation 1,117.00 340.462
  @05/11/2013 1,056.00 321.870
Conservation Storages
Country Million
Cubic Meters
Thousand
Acre-Feet
United States 2,271 1,841
Mexico 1,770 1,435
Total Conservation* 4,040 3,276
*Values may not sum due to round-off error
Ownership and Releases @ 2400 hours on 05/11/2013
Country Million
Cubic Meters
Thousand
Acre-Feet
Requested
Releases
CMS
Requested
Releases
CFS
United States 840 681 30.0 1060.0
Mexico 136 110 3.00 106.0
Total Storage 976 791 33.0 1170.0
% of US Capacity @ Normal Cons. 37.0%
Inflows, Releases, and Losses for week of 05/05-05/11
U.S. Inflows 27.8 Total Inflows 36.8
U.S. Releases 46.2 Total Releases 49.5
U.S. Losses 6.39 Total Losses 7.41
Falcon Dam
Water Surface Elevation feet meters
Top of Normal Conservation 301.20 91.805
  @05/11/2013 261.12 79.590
Conservation Storages Normal Conservation
Country Million
Cubic Meters
Thousand
Acre-Feet
United States 1,913 1,551
Mexico 1,352 1,096
Total Conservation* 3,265 2,647
*Values may not sum due to round-off error
Ownership and Releases @ 2400 hours on 05/11/2013
Country Million
Cubic Meters
Thousand
Acre-Feet
Requested
Releases
CMS
Requested
Releases
CFS
United States 483 392 20.0 706.0
Mexico 110 89 8.00 283.0
Total Storage 594 482 28.0 989.0
*Values may not sum due to round-off error
% of US Capacity @ Normal Cons. 25.2%
Inflows, Releases, and Losses for week of 05/05-05/11
U.S. Inflows 62.1 Total Inflows 81.8
U.S. Releases 22.7 Total Releases 30.7
U.S. Losses 6.34 Total Losses 7.78
Note: All dam measurements based on elevation above mean sea level.
Related Info:
U.S. Tributaries: 4,440 TCM Beginning of Current 5-Year Cycle: 10/25/2010
U.S. Springflow: 10,658 TCM Deliveries to U.S. during Current Week: 912 TCM / 739 AF
Combined U.S. flow: 15,098 TCM Deliveries to U.S. during Current Cycle: 508,836 TCM / 412,518 AF
U.S. 50/50 water: 13,257 TCM / 10,747 AF
Conversion Table
Rio Grande Flow and Reservoir Storage Conditions (Updated daily Monday through Friday)
1996-Present Amistad-Falcon Ownership Trends
Other Graphics
For further information concerning the content of this page contact:
Mr. William D. Finn
Chief, Water Accounting Division
e-mail: wfinn@ibwc.gov
(915) 832-4789
Last Updated 05/16/2013