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 05/09/2026
26.1% of U.S. Total Conservation Capacity
4.8% of Mex. Total Conservation Capacity
Amistad Dam
Water Surface Elevation		Feet	Meters
Top of Normal Conservation		1,117.00	340.462
	@05/09/2026	1,047.83	319.380
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 05/09/2026
Country	Million Cubic Meters	Thousand Acre-Feet	Requested Releases CMS	Requested Releases CFS
United States	674.499	546.822	20.0	706.0
Mexico	81.915	66.409	3.00	106.0
Total Storage	756.414	613.231	23.0	812.0
% of US Capacity @ Normal Cons.	30.15%
Inflows, Releases, and Losses for week of 05/03-05/09
U.S. Inflows (cms)	18.1	Total Inflows	24.4
U.S. Releases (cms)	20.7	Total Releases	23.7
U.S. Losses (cms)	4.56	Total Losses	5.11
Falcon Dam
Water Surface Elevation		feet	meters
Top of Normal Conservation		301.20	91.805
	@05/09/2026	258.50	78.790
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 05/09/2026
Country	Million Cubic Meters	Thousand Acre-Feet	Requested Releases CMS	Requested Releases CFS
United States	411.846	333.887	30.0	1060.0
Mexico	65.917	53.439	2.00	70.6
Total Storage	477.763	387.327	32.0	1130.0
*Values may not sum due to round-off error
% of US Capacity @ Normal Cons.	21.37%
Inflows, Releases, and Losses for week of 05/03-05/09
U.S. Inflows (cms)	33.0	Total Inflows	41.7
U.S. Releases (cms)	28.3	Total Releases	32.5
U.S. Losses (cms)	5.05	Total Losses	5.85
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 05/14/2026