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: 96.1% full as of 2026-10-02

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 2026-10-02 96.1 1,018.50 846,920 833,258 866,694 22,145
Yesterday 2026-10-01 95.9 1,018.42 845,148 831,486 866,694 22,131
2 days ago 2026-09-30 95.6 1,018.28 842,052 828,390 866,694 22,106
1 week ago 2026-09-25 95.9 1,018.41 844,927 831,265 866,694 22,129
1 month ago 2026-09-02 97.4 1,019.00 858,015 844,353 866,694 22,239
3 months ago 2026-07-02 99.7 1,019.87 877,440 863,778 866,694 22,421
6 months ago 2026-04-02 94.1 1,017.69 829,040 815,378 866,694 22,003
1 year ago 2025-10-02 95.3 1,018.18 839,842 826,180 866,694 22,088
*

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 2026-10-02 17:00 1,018.52 1,020.00 -1.48
1 hour prior 2026-10-02 16:00 1,018.52 1,020.00 -1.48
2 hours prior 2026-10-02 15:00 1,018.53 1,020.00 -1.47
6 hours prior 2026-10-02 11:00 1,018.52 1,020.00 -1.48
12 hours prior 2026-10-02 05:00 1,018.49 1,020.00 -1.51
24 hours prior 2026-10-01 17:00 1,018.49 1,020.00 -1.51
48 hours prior 2026-09-30 17:00 1,018.26 1,020.00 -1.74
*

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