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: 96.7% full as of 2026-09-12

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 2026-09-12 96.7 1,018.73 852,018 838,356 866,694 22,187
Yesterday 2026-09-11 96.8 1,018.75 852,461 838,799 866,694 22,191
2 days ago 2026-09-10 96.9 1,018.78 853,127 839,465 866,694 22,196
1 week ago 2026-09-05 97.2 1,018.91 856,014 842,352 866,694 22,221
1 month ago 2026-08-12 98.9 1,019.58 870,947 857,285 866,694 22,356
3 months ago 2026-06-12 99.6 1,019.84 876,767 863,105 866,694 22,414
6 months ago 2026-03-12 94.5 1,017.87 833,003 819,341 866,694 22,035
1 year ago 2025-09-12 96.8 1,018.74 852,239 838,577 866,694 22,189
*

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 2026-09-12 14:00 1,018.73 1,020.00 -1.27
1 hour prior 2026-09-12 13:00 1,018.72 1,020.00 -1.28
2 hours prior 2026-09-12 12:00 1,018.73 1,020.00 -1.27
6 hours prior 2026-09-12 08:00 1,018.73 1,020.00 -1.27
12 hours prior 2026-09-12 02:00 1,018.73 1,020.00 -1.27
24 hours prior 2026-09-11 14:00 1,018.77 1,020.00 -1.23
48 hours prior 2026-09-10 14:00 1,018.79 1,020.00 -1.21
*

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