Edwards-Plateau Climate Division Reservoirs: Monitored Water Supply Reservoirs are 48.5% full on 2025-09-06

Historical Data

Date Percent Full Reservoir Storage
(acre-ft)
Conservation Storage
(acre-ft)
Conservation Capacity
(acre-ft)
Today 2025-09-06 48.5 2,242,128 2,065,085 4,261,647
Yesterday 2025-09-05 48.4 2,239,178 2,062,740 4,261,647
2 days ago 2025-09-04 48.4 2,237,226 2,061,330 4,261,647
1 week ago 2025-08-30 47.9 2,235,246 2,041,043 4,261,647
1 month ago 2025-08-06 48.8 2,271,090 2,080,400 4,261,647
3 months ago 2025-06-06 35.6 1,668,023 1,518,728 4,261,647
6 months ago 2025-03-06 34.4 1,700,099 1,465,256 4,261,647
1 year ago 2024-09-06 35.5 1,717,283 1,497,212 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 35.4 1,056.76 -60.24 779,593 641,350 1,813,408 20,866
Brady Creek Water Supply 94.6 1,742.18 -0.82 28,860 27,238 28,808 1,958
Buchanan Water Supply 97.4 1,018.99 -1.01 857,793 844,131 866,694 22,237
E V Spence Water Supply 14.2 1,848.81 -49.19 73,281 73,281 517,272 4,308
Inks Water Supply 94.4 887.04 -0.96 13,249 12,966 13,729 778
Lyndon B Johnson Water Supply 98.9 824.80 -0.20 130,333 111,493 112,778 6,413
Marble Falls Water Supply 95.2 736.40 -0.60 7,233 7,233 7,597 602
Nasworthy Water Supply 85.2 1,871.70 -1.01 8,689 8,196 9,615 1,232
O C Fisher Water Supply and Flood Control 16.9 1,877.63 -30.37 19,520 19,519 115,742 1,536
O H Ivie Water Supply 51.3 1,534.16 -17.34 284,204 284,204 554,340 - n.a. -
Oak Creek Water Supply 22.8 1,979.20 -20.80 9,083 8,933 39,210 755
Twin Buttes Water Supply 14.5 1,907.35 -32.85 30,290 26,541 182,454 1,976
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.