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 08/16/2025
25.3% of U.S. Total Conservation Capacity
8.4% of Mex. Total Conservation Capacity
Amistad Dam
Water Surface Elevation Feet Meters
Top of Normal Conservation 1,117.00 340.462
  @08/16/2025 1,056.02 321.875
Conservation Storages
Country Million
Cubic Meters
Thousand
Acre-Feet
United States 2,236.814 1,813.404
Mexico 1,743.282 1,413.294
Total Conservation* 3,980.096 3,226.698
*Values may not sum due to round-off error
Ownership and Releases @ 2400 hours on 08/16/2025
Country Million
Cubic Meters
Thousand
Acre-Feet
Requested
Releases
CMS
Requested
Releases
CFS
United States 752.735 610.249 15.0 530.0
Mexico 190.017 154.048 3.00 106.0
Total Storage 942.752 764.297 18.0 636.0
% of US Capacity @ Normal Cons. 33.65%
Inflows, Releases, and Losses for week of 08/10-08/16
U.S. Inflows (cms) 17.5 Total Inflows 24.6
U.S. Releases (cms) 15.9 Total Releases 19.2
U.S. Losses (cms) 9.63 Total Losses 12.1
Falcon Dam
Water Surface Elevation feet meters
Top of Normal Conservation 301.20 91.805
  @08/16/2025 254.59 77.600
Conservation Storages Normal Conservation
Country Million
Cubic Meters
Thousand
Acre-Feet
United States 1,927.193 1,562.392
Mexico 1,361.533 1,103.806
Total Conservation* 3,288.726 2,666.198
*Values may not sum due to round-off error
Ownership and Releases @ 2400 hours on 08/16/2025
Country Million
Cubic Meters
Thousand
Acre-Feet
Requested
Releases
CMS
Requested
Releases
CFS
United States 298.775 242.219 2.00 70.6
Mexico 70.257 56.958 9.00 318.0
Total Storage 369.032 299.177 11.0 389.0
*Values may not sum due to round-off error
% of US Capacity @ Normal Cons. 15.50%
Inflows, Releases, and Losses for week of 08/10-08/16
U.S. Inflows (cms) 12.7 Total Inflows 14.3
U.S. Releases (cms) 16.5 Total Releases 26.4
U.S. Losses (cms) 6.04 Total Losses 7.50
Note: All dam measurements based on elevation above mean sea level.
Rio Grande Flow and Reservoir Storage Conditions (Updated daily Monday through Friday)
1996-Present Amistad-Falcon Ownership Trends
For further information concerning the content of this page contact:
U.S. Section - Water Accounting Division
e-mail: WA-Data@ibwc.gov
Last Updated 08/22/2025