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 03/22/2025
20.8% of U.S. Total Conservation Capacity
10.8% of Mex. Total Conservation Capacity
Amistad Dam
Water Surface Elevation Feet Meters
Top of Normal Conservation 1,117.00 340.462
  @03/22/2025 1,050.82 320.290
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 03/22/2025
Country Million
Cubic Meters
Thousand
Acre-Feet
Requested
Releases
CMS
Requested
Releases
CFS
United States 579.032 469.426 15.0 530.0
Mexico 240.818 195.233 5.40 191.0
Total Storage 819.850 664.659 20.4 721.0
% of US Capacity @ Normal Cons. 25.89%
Inflows, Releases, and Losses for week of 03/16-03/22
U.S. Inflows (cms) 16.1 Total Inflows 21.3
U.S. Releases (cms) 15.8 Total Releases 21.2
U.S. Losses (cms) 5.71 Total Losses 8.09
Falcon Dam
Water Surface Elevation feet meters
Top of Normal Conservation 301.20 91.805
  @03/22/2025 255.02 77.730
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 03/22/2025
Country Million
Cubic Meters
Thousand
Acre-Feet
Requested
Releases
CMS
Requested
Releases
CFS
United States 287.418 233.012 20.0 706.0
Mexico 92.626 75.093 7.00 247.0
Total Storage 380.044 308.105 27.0 953.0
*Values may not sum due to round-off error
% of US Capacity @ Normal Cons. 14.91%
Inflows, Releases, and Losses for week of 03/16-03/22
U.S. Inflows (cms) 12.0 Total Inflows 14.4
U.S. Releases (cms) 26.7 Total Releases 33.9
U.S. Losses (cms) 4.84 Total Losses 6.40
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:
Mr. William D. Finn
Chief, Water Accounting Division
e-mail: william.finn@ibwc.gov
(915) 832-4789
Last Updated 03/27/2025