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 09/27/2025
27.0% of U.S. Total Conservation Capacity
7.6% of Mex. Total Conservation Capacity
Amistad Dam
Water Surface Elevation		Feet	Meters
Top of Normal Conservation		1,117.00	340.462
	@09/27/2025	1,057.50	322.325
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 09/27/2025
Country	Million Cubic Meters	Thousand Acre-Feet	Requested Releases CMS	Requested Releases CFS
United States	802.654	650.719	15.0	530.0
Mexico	178.518	144.726	5.40	191.0
Total Storage	981.172	795.444	20.4	721.0
% of US Capacity @ Normal Cons.	35.88%
Inflows, Releases, and Losses for week of 09/21-09/27
U.S. Inflows (cms)	18.4	Total Inflows	26.7
U.S. Releases (cms)	15.9	Total Releases	20.1
U.S. Losses (cms)	7.03	Total Losses	8.70
Falcon Dam
Water Surface Elevation		feet	meters
Top of Normal Conservation		301.20	91.805
	@09/27/2025	254.95	77.710
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 09/27/2025
Country	Million Cubic Meters	Thousand Acre-Feet	Requested Releases CMS	Requested Releases CFS
United States	320.700	259.994	5.00	177.0
Mexico	57.650	46.737	8.00	283.0
Total Storage	378.350	306.732	13.0	460.0
*Values may not sum due to round-off error
% of US Capacity @ Normal Cons.	16.64%
Inflows, Releases, and Losses for week of 09/21-09/27
U.S. Inflows (cms)	30.2	Total Inflows	47.8
U.S. Releases (cms)	3.00	Total Releases	10.8
U.S. Losses (cms)	4.30	Total Losses	5.05
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 10/02/2025