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: 98.6% full as of 2026-08-15

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 2026-08-15 98.6 1,019.47 868,489 854,827 866,694 22,333
Yesterday 2026-08-14 98.7 1,019.49 868,936 855,274 866,694 22,337
2 days ago 2026-08-13 98.8 1,019.54 870,053 856,391 866,694 22,348
1 week ago 2026-08-08 99.1 1,019.66 872,736 859,074 866,694 22,374
1 month ago 2026-07-15 98.3 1,019.36 866,034 852,372 866,694 22,310
3 months ago 2026-05-15 97.6 1,019.05 859,127 845,465 866,694 22,249
6 months ago 2026-02-15 93.9 1,017.60 827,060 813,398 866,694 21,987
1 year ago 2025-08-15 98.9 1,019.59 871,171 857,509 866,694 22,358
*

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 2026-08-15 21:00 1,019.44 1,020.00 -0.56
1 hour prior 2026-08-15 20:00 1,019.44 1,020.00 -0.56
2 hours prior 2026-08-15 19:00 1,019.46 1,020.00 -0.54
6 hours prior 2026-08-15 15:00 1,019.46 1,020.00 -0.54
12 hours prior 2026-08-15 09:00 1,019.47 1,020.00 -0.53
24 hours prior 2026-08-14 21:00 1,019.47 1,020.00 -0.53
48 hours prior 2026-08-13 21:00 1,019.50 1,020.00 -0.50
*

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