Rio-Grande River Basin Reservoirs: Monitored Water Supply Reservoirs are 27.5% full on 2025-09-16

Historical Data

Date Percent Full Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Today 2025-09-16 27.5 1,158,851 969,910 3,520,940
Yesterday 2025-09-15 27.5 1,158,938 969,992 3,520,940
2 days ago 2025-09-14 27.6 1,159,605 970,557 3,520,940
1 week ago 2025-09-09 27.4 1,152,090 964,261 3,520,940
1 month ago 2025-08-16 26.2 1,136,923 924,091 3,520,940
3 months ago 2025-06-16 23.8 1,028,828 838,611 3,520,940
6 months ago 2025-03-16 21.9 1,046,449 771,952 3,520,940
1 year ago 2024-09-16 21.1 1,029,104 744,349 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 35.8 1,057.42 -59.58 793,879 648,776 1,813,408 21,219
Falcon 1 Water Supply 15.9 254.24 -46.96 291,778 247,940 1,562,367 20,057
Red Bluff Water Supply 50.4 2,816.20 -11.90 73,194 73,194 145,165 4,820
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.