Edwards-Plateau Climate Division Reservoirs: Monitored Water Supply Reservoirs are 48.3% full on 2025-09-17

Historical Data

Date Percent Full Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Today 2025-09-17 48.3 2,241,084 2,056,999 4,261,647
Yesterday 2025-09-16 48.3 2,241,061 2,057,040 4,261,647
2 days ago 2025-09-15 48.3 2,241,289 2,057,465 4,261,647
1 week ago 2025-09-10 48.4 2,245,116 2,061,783 4,261,647
1 month ago 2025-08-17 48.3 2,249,697 2,056,910 4,261,647
3 months ago 2025-06-17 36.7 1,720,565 1,561,967 4,261,647
6 months ago 2025-03-17 34.1 1,686,682 1,451,592 4,261,647
1 year ago 2024-09-17 36.0 1,742,559 1,519,147 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 35.8 1,057.47 -59.53 794,877 649,592 1,813,408 21,244
Brady Creek Water Supply 93.0 1,741.95 -1.05 28,424 26,802 28,808 1,936
Buchanan Water Supply 96.4 1,018.61 -1.39 849,357 835,695 866,694 22,165
E V Spence Water Supply 13.9 1,848.49 -49.51 71,911 71,911 517,272 4,243
Inks Water Supply 95.0 887.14 -0.86 13,328 13,045 13,729 784
Lyndon B Johnson Water Supply 98.6 824.76 -0.24 130,077 111,237 112,778 6,409
Marble Falls Water Supply 95.0 736.37 -0.63 7,215 7,215 7,597 601
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 16.5 1,877.35 -30.65 19,094 19,093 115,742 1,505
O H Ivie Water Supply 50.5 1,533.79 -17.71 279,736 279,736 554,340 - n.a. -
Oak Creek Water Supply 22.3 1,978.94 -21.06 8,904 8,754 39,210 745
Twin Buttes Water Supply 14.1 1,906.94 -33.26 29,485 25,736 182,454 1,930
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.