Rio-Grande River Basin Reservoirs: Monitored Water Supply Reservoirs are 25.4% full on 2025-07-09

Historical Data

Date Percent Full Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Today 2025-07-09 25.4 1,087,925 893,538 3,520,940
Yesterday 2025-07-08 25.4 1,087,925 893,538 3,520,940
2 days ago 2025-07-07 25.1 1,076,083 883,807 3,520,940
1 week ago 2025-07-02 24.2 1,035,891 850,389 3,520,940
1 month ago 2025-06-09 23.2 984,087 815,745 3,520,940
3 months ago 2025-04-09 22.0 1,065,502 775,669 3,520,940
6 months ago 2025-01-09 21.6 1,076,751 759,163 3,520,940
1 year ago 2024-07-09 19.8 971,937 696,988 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 32.5 1,053.61 -63.39 716,385 589,124 1,813,408 19,303
Falcon 1 Water Supply 15.4 255.13 -46.07 310,377 241,088 1,562,367 20,975
Red Bluff Water Supply 50.5 2,816.22 -11.88 73,291 73,291 145,165 4,824
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.