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: 96.9% full as of 2026-09-09

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 2026-09-09 96.9 1,018.81 853,793 840,131 866,694 22,202
Yesterday 2026-09-08 97.0 1,018.84 854,459 840,797 866,694 22,208
2 days ago 2026-09-07 97.1 1,018.87 855,126 841,464 866,694 22,214
1 week ago 2026-09-02 97.4 1,019.00 858,015 844,353 866,694 22,239
1 month ago 2026-08-09 99.1 1,019.65 872,513 858,851 866,694 22,371
3 months ago 2026-06-09 99.6 1,019.85 876,991 863,329 866,694 22,416
6 months ago 2026-03-09 94.4 1,017.82 831,902 818,240 866,694 22,026
1 year ago 2025-09-09 97.0 1,018.82 854,015 840,353 866,694 22,204
*

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 2026-09-09 19:00 1,018.79 1,020.00 -1.21
1 hour prior 2026-09-09 18:00 1,018.80 1,020.00 -1.20
2 hours prior 2026-09-09 17:00 1,018.81 1,020.00 -1.19
6 hours prior 2026-09-09 13:00 1,018.81 1,020.00 -1.19
12 hours prior 2026-09-09 07:00 1,018.81 1,020.00 -1.19
24 hours prior 2026-09-08 19:00 1,018.82 1,020.00 -1.18
48 hours prior 2026-09-07 19:00 1,018.86 1,020.00 -1.14
*

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