Notes

2025-06-12: Lake Buchanan's conservation pool elevation has been updated to a year-round elevation of 1,020.00 ft above NAVD88 +0.26. This change was implemented because, effective January 1, 2025, the Lower Colorado River Authority (LCRA) no longer operates Lake Buchanan to a varying seasonal conservation pool elevation.

Lake Buchanan: 97.7% full as of 2026-08-25

Historical Data

Date Percent Full Mean Water Level
(ft) 		Reservoir Storage
(acre-ft) 		Conservation Storage
(acre-ft) 		Conservation Capacity
(acre-ft) 		Surface Area
(acres)
Today 2026-08-25 97.7 1,019.10 860,240 846,578 866,694 22,258
Yesterday 2026-08-24 97.8 1,019.14 861,130 847,468 866,694 22,266
2 days ago 2026-08-23 97.9 1,019.18 862,021 848,359 866,694 22,274
1 week ago 2026-08-18 98.3 1,019.36 866,034 852,372 866,694 22,310
1 month ago 2026-07-25 99.4 1,019.78 875,423 861,761 866,694 22,400
3 months ago 2026-05-25 98.8 1,019.55 870,277 856,615 866,694 22,350
6 months ago 2026-02-25 93.9 1,017.63 827,720 814,058 866,694 21,993
1 year ago 2025-08-25 98.5 1,019.40 866,926 853,264 866,694 22,319
*

Percent Full is based on Conservation Storage and Conservation Capacity and doesn't account for storage in flood pool.

**

   Values above, including today's are averaged conditions. For near real-time instantaneous water level, see table below or the interactive map viewer.

Most Recent Instantaneous Water Level

Date/time Water Level
(ft) 		Conservation Pool Elevation
(ft) 		Height Above Conservation Pool
(ft)
Most recent 2026-08-25 23:30 1,019.07 1,020.00 -0.93
1 hour prior 2026-08-25 22:30 1,019.08 1,020.00 -0.92
2 hours prior 2026-08-25 21:30 1,019.08 1,020.00 -0.92
6 hours prior 2026-08-25 17:30 1,019.09 1,020.00 -0.91
12 hours prior 2026-08-25 11:30 1,019.11 1,020.00 -0.89
24 hours prior 2026-08-24 23:30 1,019.11 1,020.00 -0.89
48 hours prior 2026-08-23 23:30 1,019.17 1,020.00 -0.83
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1938-01-01
Vertical datum NAVD88 +0.26
Dead pool elevation 937.00 ft above NAVD88 +0.26
Service spillway crest elevation 1,020.49 ft above NAVD88 +0.26
Emergency spillway crest elevation 1,020.49 ft above NAVD88 +0.26
Maximum design elevation 1,023.99 ft above NAVD88 +0.26
Top of dam elevation 1,025.50 ft above NAVD88 +0.26
Conservation pool elevation
Start date: 2024-11-01 		1,020.00 ft above NAVD88 +0.26
Conservation pool elevation
Start date to end date: 1990-05-01 to 2024-11-01 (Seasonal: May 1 to November 1)		 1,018.00 ft above NAVD88 +0.26
Conservation pool elevation
Start date to end date: 1990-05-01 to 2024-11-01 (Seasonal: November 1 to May 1)		 1,020.00 ft above NAVD88 +0.26
Conservation pool elevation
Start date to end date: 1990-03-08 to 1990-05-01 		1,020.00 ft above NAVD88 +0.26
Conservation pool elevation
End date: 1990-03-08 		1,020.50 ft above NAVD88 +0.26
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2006-03-01 (source: TWDB) : GIS Data
2019-07-01 (source: TWDB) : GIS Data
Data Source LCRA:1995

Lake Location