Edwards-Plateau Climate Division Reservoirs: Monitored Water Supply Reservoirs are 48.5% full on 2025-07-15

Historical Data

Date Percent Full Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Today 2025-07-15 48.5 2,254,003 2,068,167 4,261,647
Yesterday 2025-07-14 48.1 2,234,767 2,050,520 4,261,647
2 days ago 2025-07-13 46.7 2,170,570 1,988,472 4,261,647
1 week ago 2025-07-08 43.8 2,040,285 1,866,507 4,261,647
1 month ago 2025-06-15 36.6 1,717,538 1,559,215 4,261,647
3 months ago 2025-04-15 32.9 1,630,578 1,401,607 4,261,647
6 months ago 2025-01-15 35.1 1,727,749 1,496,411 4,261,647
1 year ago 2024-07-15 34.5 1,658,477 1,454,598 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 33.6 1,055.41 -61.59 752,122 608,480 1,813,408 20,188
Brady Creek Water Supply 100.0 1,743.12 0.12 30,734 28,808 28,808 2,036
Buchanan Water Supply 98.0 1,019.21 -0.79 862,690 849,028 866,694 22,280
E V Spence Water Supply 15.4 1,850.22 -47.78 79,477 79,477 517,272 4,476
Inks Water Supply 100.0 891.61 3.61 17,102 13,729 13,729 917
Lyndon B Johnson Water Supply 98.0 824.64 -0.36 129,308 110,468 112,778 6,398
Marble Falls Water Supply 91.7 735.95 -1.05 6,964 6,964 7,597 592
Nasworthy Water Supply 89.1 1,872.00 -0.71 9,062 8,569 9,615 1,254
O C Fisher Water Supply and Flood Control 18.9 1,879.04 -28.96 21,824 21,823 115,742 1,765
O H Ivie Water Supply 54.7 1,535.69 -15.81 303,263 303,263 554,340 - n.a. -
Oak Creek Water Supply 25.2 1,980.46 -19.54 10,019 9,869 39,210 812
Twin Buttes Water Supply 15.2 1,907.93 -32.27 31,438 27,689 182,454 2,040
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.