Edwards-Plateau Climate Division Reservoirs: Monitored Water Supply Reservoirs are 47.6% full on 2025-10-27

Historical Data

Date Percent Full Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Today 2025-10-27 47.6 2,211,474 2,029,757 4,261,647
Yesterday 2025-10-26 47.6 2,210,900 2,029,279 4,261,647
2 days ago 2025-10-25 47.5 2,206,358 2,025,290 4,261,647
1 week ago 2025-10-20 47.4 2,200,365 2,020,028 4,261,647
1 month ago 2025-09-27 47.8 2,229,240 2,038,956 4,261,647
3 months ago 2025-07-27 49.1 2,279,920 2,092,182 4,261,647
6 months ago 2025-04-27 33.3 1,627,853 1,421,168 4,261,647
1 year ago 2024-10-27 35.3 1,714,639 1,489,424 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 36.3 1,057.72 -59.28 800,316 657,399 1,813,408 21,380
Brady Creek Water Supply 89.4 1,741.38 -1.62 27,367 25,745 28,808 1,886
Buchanan Water Supply 95.5 1,018.23 -1.77 840,947 827,285 866,694 22,097
E V Spence Water Supply 13.3 1,847.67 -50.33 68,546 68,546 517,272 4,017
Inks Water Supply 57.1 879.17 -8.83 8,122 7,839 13,729 533
Lyndon B Johnson Water Supply 98.4 824.72 -0.28 129,821 110,981 112,778 6,406
Marble Falls Water Supply 95.1 736.38 -0.62 7,221 7,221 7,597 601
Nasworthy Water Supply 85.0 1,871.68 -1.03 8,664 8,171 9,615 1,231
O C Fisher Water Supply and Flood Control 15.7 1,876.73 -31.27 18,181 18,180 115,742 1,435
O H Ivie Water Supply 48.1 1,532.70 -18.80 266,865 266,865 554,340 - n.a. -
Oak Creek Water Supply 21.2 1,978.31 -21.69 8,456 8,306 39,210 716
Twin Buttes Water Supply 12.7 1,905.57 -34.63 26,968 23,219 182,454 1,778
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.