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: 96.6% full as of 2026-09-14

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 2026-09-14 96.6 1,018.66 850,465 836,803 866,694 22,174
Yesterday 2026-09-13 96.6 1,018.68 850,908 837,246 866,694 22,178
2 days ago 2026-09-12 96.7 1,018.72 851,796 838,134 866,694 22,185
1 week ago 2026-09-07 97.1 1,018.87 855,126 841,464 866,694 22,214
1 month ago 2026-08-14 98.7 1,019.49 868,936 855,274 866,694 22,337
3 months ago 2026-06-14 99.5 1,019.80 875,871 862,209 866,694 22,405
6 months ago 2026-03-14 94.5 1,017.84 832,342 818,680 866,694 22,029
1 year ago 2025-09-14 96.6 1,018.67 850,687 837,025 866,694 22,176
*

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 2026-09-14 07:00 1,018.66 1,020.00 -1.34
1 hour prior 2026-09-14 06:00 1,018.66 1,020.00 -1.34
2 hours prior 2026-09-14 05:00 1,018.66 1,020.00 -1.34
6 hours prior 2026-09-14 01:00 1,018.66 1,020.00 -1.34
12 hours prior 2026-09-13 19:00 1,018.67 1,020.00 -1.33
24 hours prior 2026-09-13 07:00 1,018.70 1,020.00 -1.30
48 hours prior 2026-09-12 07:00 1,018.73 1,020.00 -1.27
*

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