Rio-Grande River Basin Reservoirs: Monitored Water Supply Reservoirs are 27.0% full on 2025-09-06

Historical Data

Date Percent Full Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Today 2025-09-06 27.0 1,135,297 952,213 3,520,940
Yesterday 2025-09-05 27.0 1,132,948 950,308 3,520,940
2 days ago 2025-09-04 26.9 1,130,758 948,523 3,520,940
1 week ago 2025-08-30 26.1 1,126,733 920,616 3,520,940
1 month ago 2025-08-06 26.7 1,155,391 939,206 3,520,940
3 months ago 2025-06-06 23.3 986,830 818,849 3,520,940
6 months ago 2025-03-06 22.2 1,053,184 780,350 3,520,940
1 year ago 2024-09-06 20.3 988,340 713,362 3,520,940
*

 Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.

Area Map

Reservoir Storage

Reservoir Type Percent Full Water Level
(ft)
Height Above Conservation Pool
(ft)
Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Surface Area
(acres)
Amistad 1 Water Supply and Flood Control 35.4 1,056.76 -60.24 779,593 641,350 1,813,408 20,866
Falcon 1 Water Supply 15.2 253.77 -47.43 282,800 237,959 1,562,367 19,646
Red Bluff Water Supply 50.2 2,816.14 -11.96 72,904 72,904 145,165 4,808
footnotes
1

Lake Amistad and Lake Falcon straddle the border of Texas and Mexico. By treaty, Texas has rights to 56.2% of the total conservation capacity of Amistad and 58.6% of the total conservation capacity of Falcon. The fraction of the actual storage that belongs to Texas is formally determined biweekly by the International Boundary Water Commission (IBWC). The IBWC is the legal repository of data related to this lake for treaty purposes and official versions of the datasets should be obtained directly from them. Conservation capacity is based on the fixed percent of total conservation capacity. Conservation storage is based on the bi-weekly changing Texas share.