Edwards-Plateau Climate Division Reservoirs: Monitored Water Supply Reservoirs are 44.6% full on 2026-04-01

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-04-01 44.6 1,990,778 1,901,789 4,261,647
Yesterday 2026-03-31 44.7 1,992,344 1,903,265 4,261,647
2 days ago 2026-03-30 44.7 1,993,902 1,904,743 4,261,647
1 week ago 2026-03-25 44.9 2,002,445 1,912,846 4,261,647
1 month ago 2026-03-01 45.4 2,051,522 1,936,715 4,261,647
3 months ago 2026-01-01 47.3 2,132,639 2,017,833 4,261,647
6 months ago 2025-10-01 47.9 2,223,205 2,039,890 4,261,647
1 year ago 2025-04-01 33.6 1,664,780 1,430,969 4,261,647
*

 Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.

Area Map

recent reservoir storage 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 31.3 1,048.11 -68.89 617,820 567,631 1,813,408 16,685
Brady Creek Water Supply 94.9 1,742.23 -0.77 28,959 27,337 28,808 1,963
Buchanan Water Supply 94.0 1,017.65 -2.35 828,160 814,498 866,694 21,996
E V Spence Water Supply 11.6 1,845.43 -52.57 59,790 59,790 517,272 3,794
Inks Water Supply 95.8 887.27 -0.73 13,430 13,147 13,729 791
Lyndon B Johnson Water Supply 99.0 824.82 -0.18 130,462 111,622 112,778 6,415
Marble Falls Water Supply 94.3 736.29 -0.71 7,167 7,167 7,597 599
Nasworthy Water Supply 86.0 1,871.76 -0.95 8,762 8,269 9,615 1,236
O C Fisher Water Supply and Flood Control 14.2 1,875.43 -32.57 16,396 16,395 115,742 1,326
O H Ivie Water Supply 45.1 1,531.19 -20.31 249,731 249,731 554,340 - n.a. -
Oak Creek Water Supply 18.0 1,976.36 -23.64 7,201 7,051 39,210 634
Twin Buttes Water Supply and Flood Control 10.5 1,903.13 -37.07 22,900 19,151 182,454 1,580
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.