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: 99.2% full as of 2026-08-05

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 2026-08-05 99.2 1,019.71 873,855 860,193 866,694 22,385
Yesterday 2026-08-04 99.3 1,019.73 874,303 860,641 866,694 22,389
2 days ago 2026-08-03 99.4 1,019.75 874,751 861,089 866,694 22,394
1 week ago 2026-07-29 99.4 1,019.78 875,423 861,761 866,694 22,400
1 month ago 2026-07-05 99.4 1,019.75 874,751 861,089 866,694 22,394
3 months ago 2026-05-05 96.5 1,018.65 850,243 836,581 866,694 22,172
6 months ago 2026-02-05 93.4 1,017.44 823,544 809,882 866,694 21,959
1 year ago 2025-08-05 99.7 1,019.88 877,664 864,002 866,694 22,423
*

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 2026-08-05 17:30 1,019.70 1,020.00 -0.30
1 hour prior 2026-08-05 16:30 1,019.70 1,020.00 -0.30
2 hours prior 2026-08-05 15:30 1,019.70 1,020.00 -0.30
6 hours prior 2026-08-05 11:30 1,019.71 1,020.00 -0.29
12 hours prior 2026-08-05 05:30 1,019.71 1,020.00 -0.29
24 hours prior 2026-08-04 17:30 1,019.73 1,020.00 -0.27
48 hours prior 2026-08-03 17:30 1,019.75 1,020.00 -0.25
*

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