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 05/18/2019
63.2% of U.S. Total Conservation Capacity
16.4% of Mex. Total Conservation Capacity
Amistad Dam
Water Surface Elevation Feet Meters
Top of Normal Conservation 1,117.00 340.462
  @05/18/2019 1,084.78 330.640
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 05/18/2019
Country Million
Cubic Meters
Thousand
Acre-Feet
Requested
Releases
CMS
Requested
Releases
CFS
United States 1,804 1,463 20.0 706.0
Mexico 202 164 123.0 4340.0
Total Storage 2,006 1,626 143.0 5050.0
% of US Capacity @ Normal Cons. 79.4%
Inflows, Releases, and Losses for week of 05/12-05/18
U.S. Inflows 42.6 Total Inflows 57.8
U.S. Releases 22.5 Total Releases 145.0
U.S. Losses 11.0 Total Losses 12.4
Falcon Dam
Water Surface Elevation feet meters
Top of Normal Conservation 301.20 91.805
  @05/18/2019 273.79 83.450
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 05/18/2019
Country Million
Cubic Meters
Thousand
Acre-Feet
Requested
Releases
CMS
Requested
Releases
CFS
United States 840 681 50.0 1770.0
Mexico 310 251 50.0 1770.0
Total Storage 1,150 932 100.0 3540.0
*Values may not sum due to round-off error
% of US Capacity @ Normal Cons. 43.9%
Inflows, Releases, and Losses for week of 05/12-05/18
U.S. Inflows 27.5 Total Inflows 164.0
U.S. Releases 51.2 Total Releases 135.0
U.S. Losses 5.69 Total Losses 7.66
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 05/23/2019