Edwards-Plateau Climate Division Reservoirs: Monitored Water Supply Reservoirs are 46.9% full on 2026-01-11

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-01-11 46.9 2,112,060 1,998,038 4,261,647
Yesterday 2026-01-10 47.0 2,115,732 2,001,570 4,261,647
2 days ago 2026-01-09 47.0 2,117,084 2,002,860 4,261,647
1 week ago 2026-01-04 47.2 2,126,132 2,011,550 4,261,647
1 month ago 2025-12-11 47.7 2,196,190 2,033,318 4,261,647
3 months ago 2025-10-11 47.6 2,213,026 2,027,624 4,261,647
6 months ago 2025-07-11 45.7 2,126,748 1,945,779 4,261,647
1 year ago 2025-01-11 35.2 1,730,964 1,500,270 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 35.3 1,053.54 -63.46 715,028 639,806 1,813,408 19,269
Brady Creek Water Supply 98.0 1,742.68 -0.32 29,849 28,227 28,808 1,999
Buchanan Water Supply 94.6 1,017.90 -2.10 833,664 820,002 866,694 22,040
E V Spence Water Supply 12.4 1,846.52 -51.48 63,990 63,990 517,272 3,908
Inks Water Supply 95.0 887.13 -0.87 13,320 13,037 13,729 784
Lyndon B Johnson Water Supply 98.5 824.73 -0.27 129,885 111,045 112,778 6,406
Marble Falls Water Supply 94.9 736.36 -0.64 7,209 7,209 7,597 601
Nasworthy Water Supply 86.3 1,871.78 -0.93 8,787 8,294 9,615 1,238
O C Fisher Water Supply and Flood Control 14.9 1,876.07 -31.93 17,252 17,251 115,742 1,356
O H Ivie Water Supply 46.9 1,532.10 -19.40 259,942 259,942 554,340 - n.a. -
Oak Creek Water Supply 19.5 1,977.30 -22.70 7,809 7,659 39,210 673
Twin Buttes Water Supply and Flood Control 11.8 1,904.62 -35.58 25,325 21,576 182,454 1,688
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.