Colorado River Basin Reservoirs: Monitored Water Supply Reservoirs are 66.7% full on 2026-08-19

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-08-19 66.7 2,736,552 2,679,417 4,019,576
Yesterday 2026-08-18 66.7 2,736,736 2,679,601 4,019,576
2 days ago 2026-08-17 66.7 2,739,949 2,682,814 4,019,576
1 week ago 2026-08-12 67.2 2,758,630 2,701,495 4,019,576
1 month ago 2026-07-19 67.9 2,860,190 2,730,623 4,019,576
3 months ago 2026-05-19 60.4 2,484,644 2,427,509 4,019,576
6 months ago 2026-02-19 61.0 2,510,750 2,453,615 4,019,576
1 year ago 2025-08-19 67.7 2,777,706 2,720,571 4,019,576
*

 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)
Austin Water Supply 96.3 492.23 -0.57 23,690 23,081 23,972 1,547
Brady Creekas of 2026-08-18 Water Supply 89.1 1,741.34 -1.66 27,286 25,664 28,808 1,883
Brownwoodas of 2026-08-18 Water Supply 88.4 1,422.59 -2.01 115,705 115,705 130,868 6,318
Buchanan Water Supply 98.3 1,019.34 -0.66 865,588 851,926 866,694 22,306
Champion Creek Water Supply 43.7 2,063.16 -19.84 18,176 18,176 41,580 875
Colemanas of 2026-08-18 Water Supply 82.1 1,713.60 -3.90 31,280 31,262 38,075 1,675
Colorado City Water Supply 55.8 2,059.56 -10.64 17,169 17,169 30,758 - n.a. -
E V Spence Water Supply 10.2 1,843.45 -54.55 52,687 52,687 517,272 3,412
Hords Creekas of 2026-08-18 Water Supply and Flood Control 49.0 1,889.37 -10.63 3,975 3,972 8,109 286
Inks Water Supply 95.0 887.14 -0.86 13,328 13,045 13,729 784
J B Thomasas of 2026-08-18 Water Supply 22.4 2,227.61 -30.39 45,552 44,879 199,931 3,240
Lyndon B Johnson Water Supply 99.1 824.84 -0.16 130,590 111,750 112,778 6,417
Marble Falls Water Supply 93.9 736.23 -0.77 7,131 7,131 7,597 598
Nasworthyas of 2026-08-18 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 12.0 1,873.41 -34.59 13,847 13,846 115,742 1,199
O H Ivieas of 2026-08-18 Water Supply 44.6 1,530.99 -20.51 247,499 247,499 554,340 - n.a. -
Oak Creekas of 2026-08-18 Water Supply 15.3 1,974.58 -25.42 6,146 5,996 39,210 561
Travis Water Supply and Flood Control 97.7 679.68 -1.32 1,090,146 1,073,114 1,098,044 18,733
Twin Buttes Water Supply and Flood Control 6.7 1,898.21 -41.99 16,020 12,271 182,454 1,246