Colorado River Basin Reservoirs: Monitored Water Supply Reservoirs are 63.4% full on 2026-09-21

Historical Data

Date Percent Full Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft)
Today 2026-09-21 63.4 2,604,611 2,547,476 4,019,576
Yesterday 2026-09-20 63.4 2,606,900 2,549,765 4,019,576
2 days ago 2026-09-19 63.5 2,610,199 2,553,064 4,019,576
1 week ago 2026-09-14 64.1 2,631,902 2,574,767 4,019,576
1 month ago 2026-08-21 66.4 2,725,803 2,668,668 4,019,576
3 months ago 2026-06-21 64.4 2,645,782 2,588,647 4,019,576
6 months ago 2026-03-21 60.3 2,481,848 2,424,713 4,019,576
1 year ago 2025-09-21 65.4 2,684,590 2,627,455 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 97.2 492.37 -0.43 23,907 23,298 23,972 1,555
Brady Creek Water Supply 84.7 1,740.68 -2.32 26,034 24,412 28,808 1,822
Brownwood Water Supply 82.9 1,421.42 -3.18 108,454 108,454 130,868 6,078
Buchanan Water Supply 96.1 1,018.50 -1.50 846,920 833,258 866,694 22,145
Champion Creek Water Supply 42.2 2,062.43 -20.57 17,538 17,538 41,580 857
Coleman Water Supply 78.6 1,712.80 -4.70 29,952 29,934 38,075 1,645
Colorado City Water Supply 53.1 2,058.78 -11.42 16,320 16,320 30,758 - n.a. -
E V Spence Water Supply 9.5 1,842.39 -55.61 49,151 49,151 517,272 3,264
Hords Creek Water Supply and Flood Control 46.1 1,888.53 -11.47 3,740 3,737 8,109 273
Inks Water Supply 95.8 887.28 -0.72 13,438 13,155 13,729 791
J B Thomas Water Supply 20.4 2,226.33 -31.67 41,477 40,804 199,931 3,126
Lyndon B Johnson Water Supply 98.9 824.81 -0.19 130,397 111,557 112,778 6,414
Marble Falls Water Supply 97.8 736.73 -0.27 7,432 7,432 7,597 608
Nasworthy Water Supply 85.9 1,871.75 -0.96 8,750 8,257 9,615 1,236
O C Fisher Water Supply and Flood Control 11.1 1,872.50 -35.50 12,791 12,790 115,742 1,124
O H Ivie Water Supply 42.2 1,529.73 -21.77 233,927 233,927 554,340 - n.a. -
Oak Creek Water Supply 14.0 1,973.65 -26.35 5,639 5,489 39,210 524
Travis Water Supply and Flood Control 90.9 675.59 -5.41 1,015,422 998,390 1,098,044 17,804
Twin Buttes Water Supply and Flood Control 5.2 1,895.90 -44.30 13,322 9,573 182,454 1,105