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 09/09/2023
23.3% of U.S. Total Conservation Capacity
25.6% of Mex. Total Conservation Capacity
Amistad Dam
Water Surface Elevation		Feet	Meters
Top of Normal Conservation		1,117.00	340.462
	@09/09/2023	1,066.86	325.180
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 09/09/2023
Country	Million Cubic Meters	Thousand Acre-Feet	Requested Releases CMS	Requested Releases CFS
United States	788	639	30.0	1060.0
Mexico	502	407	5.50	194.0
Total Storage	1,290	1,046	35.5	1250.0
% of US Capacity @ Normal Cons.	34.7%
Inflows, Releases, and Losses for week of 09/03-09/09
U.S. Inflows (cms)	19.9	Total Inflows	31.1
U.S. Releases (cms)	31.6	Total Releases	37.9
U.S. Losses (cms)	8.44	Total Losses	13.8
Falcon Dam
Water Surface Elevation		feet	meters
Top of Normal Conservation		301.20	91.805
	@09/09/2023	257.86	78.595
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 09/09/2023
Country	Million Cubic Meters	Thousand Acre-Feet	Requested Releases CMS	Requested Releases CFS
United States	188	152	50.0	1770.0
Mexico	296	240	5.00	177.0
Total Storage	484	392	55.0	1950.0
*Values may not sum due to round-off error
% of US Capacity @ Normal Cons.	9.8%
Inflows, Releases, and Losses for week of 09/03-09/09
U.S. Inflows (cms)	26.8	Total Inflows	31.7
U.S. Releases (cms)	39.5	Total Releases	44.5
U.S. Losses (cms)	3.84	Total Losses	9.76
Note: All dam measurements based on elevation above mean sea level.
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: william.finn@ibwc.gov
(915) 832-4789
Last Updated 09/14/2023