Edwards-Plateau Climate Division Reservoirs: Monitored Water Supply Reservoirs are 48.2% full on 2026-07-26

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-07-26 48.2 2,191,303 2,054,262 4,261,647
Yesterday 2026-07-25 48.2 2,190,384 2,053,532 4,261,647
2 days ago 2026-07-24 48.1 2,186,963 2,050,574 4,261,647
1 week ago 2026-07-19 46.7 2,121,194 1,992,061 4,261,647
1 month ago 2026-06-26 45.2 2,043,111 1,925,772 4,261,647
3 months ago 2026-04-26 45.1 2,024,165 1,923,628 4,261,647
6 months ago 2026-01-26 46.1 2,084,502 1,966,059 4,261,647
1 year ago 2025-07-26 48.4 2,278,968 2,063,409 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 37.4 1,056.59 -60.41 775,913 677,634 1,813,408 20,775
Brady Creek Water Supply 92.9 1,741.93 -1.07 28,387 26,765 28,808 1,934
Buchanan Water Supply 99.4 1,019.78 -0.22 875,423 861,761 866,694 22,400
E V Spence Water Supply 10.9 1,844.45 -53.55 56,179 56,179 517,272 3,576
Inks Water Supply 94.7 887.09 -0.91 13,288 13,005 13,729 781
Lyndon B Johnson Water Supply 97.7 824.59 -0.41 128,989 110,149 112,778 6,393
Marble Falls Water Supply 95.2 736.40 -0.60 7,233 7,233 7,597 602
Nasworthy Water Supply 85.6 1,871.73 -0.98 8,726 8,233 9,615 1,234
O C Fisher Water Supply and Flood Control 12.7 1,874.12 -33.88 14,709 14,708 115,742 1,237
O H Ivie Water Supply 46.6 1,531.94 -19.56 258,117 258,117 554,340 - n.a. -
Oak Creek Water Supply 16.5 1,975.39 -24.61 6,636 6,486 39,210 594
Twin Buttes Water Supply and Flood Control 7.9 1,899.90 -40.30 18,202 14,453 182,454 1,349
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.