Edwards-Plateau Climate Division Reservoirs: Monitored Water Supply Reservoirs are 48.4% full on 2025-07-25

Historical Data

Date Percent Full Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Today 2025-07-25 48.4 2,276,172 2,061,474 4,261,647
Yesterday 2025-07-24 48.3 2,273,995 2,059,729 4,261,647
2 days ago 2025-07-23 48.3 2,272,469 2,058,631 4,261,647
1 week ago 2025-07-18 48.4 2,271,877 2,061,681 4,261,647
1 month ago 2025-06-25 36.3 1,706,308 1,545,299 4,261,647
3 months ago 2025-04-25 33.4 1,630,228 1,424,163 4,261,647
6 months ago 2025-01-25 34.9 1,719,687 1,488,089 4,261,647
1 year ago 2024-07-25 34.6 1,669,382 1,457,346 4,217,160
*

 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 32.3 1,055.91 -61.09 762,150 586,356 1,813,408 20,436
Brady Creek Water Supply 100.0 1,743.04 0.04 30,534 28,808 28,808 2,026
Buchanan Water Supply 100.0 1,020.00 0.00 880,356 866,694 866,694 22,452
E V Spence Water Supply 15.3 1,850.09 -47.91 78,896 78,896 517,272 4,461
Inks Water Supply 94.4 887.03 -0.97 13,242 12,959 13,729 777
Lyndon B Johnson Water Supply 98.5 824.74 -0.26 129,949 111,109 112,778 6,407
Marble Falls Water Supply 94.7 736.34 -0.66 7,197 7,197 7,597 600
Nasworthy Water Supply 85.1 1,871.69 -1.02 8,676 8,183 9,615 1,232
O C Fisher Water Supply and Flood Control 18.5 1,878.80 -29.20 21,418 21,417 115,742 1,724
O H Ivie Water Supply 54.3 1,535.50 -16.00 300,857 300,857 554,340 - n.a. -
Oak Creek Water Supply 24.7 1,980.18 -19.82 9,835 9,685 39,210 799
Twin Buttes Water Supply 16.1 1,908.71 -31.49 33,062 29,313 182,454 2,127
footnotes
1

Lake Amistad straddles the border of Texas and Mexico. By treaty, Texas has rights 56.2% of the total conservation capacity. 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 56.2% of total conservation capacity. Conservation storage is based on the bi-weekly changing Texas fraction.