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: 95.7% full as of 2026-10-25

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 2026-10-25 95.7 1,018.34 843,379 829,717 866,694 22,117
Yesterday 2026-10-24 95.8 1,018.35 843,600 829,938 866,694 22,118
2 days ago 2026-10-23 95.8 1,018.35 843,600 829,938 866,694 22,118
1 week ago 2026-10-18 95.9 1,018.39 844,485 830,823 866,694 22,125
1 month ago 2026-09-25 95.9 1,018.41 844,927 831,265 866,694 22,129
3 months ago 2026-07-25 99.4 1,019.78 875,423 861,761 866,694 22,400
6 months ago 2026-04-25 96.5 1,018.63 849,800 836,138 866,694 22,168
1 year ago 2025-10-25 95.2 1,018.15 839,180 825,518 866,694 22,083
*

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 2026-10-25 02:45 1,018.34 1,020.00 -1.66
1 hour prior 2026-10-25 01:45 1,018.34 1,020.00 -1.66
2 hours prior 2026-10-25 00:45 1,018.34 1,020.00 -1.66
6 hours prior 2026-10-24 20:45 1,018.35 1,020.00 -1.65
12 hours prior 2026-10-24 14:45 1,018.35 1,020.00 -1.65
24 hours prior 2026-10-24 02:45 1,018.35 1,020.00 -1.65
48 hours prior 2026-10-23 02:45 1,018.35 1,020.00 -1.65
*

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