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: 94.6% full as of 2026-01-11

The elevation-storage rating curve used to produce the storage hydrograph is made of two segments: (1) the segment up to the conservation pool top (below the red line) is based on measured data, and (2) the segment in the flood pool (above the red line) is an extrapolation from the first segment and shouldn't be relied upon for flood storage information.

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 2026-01-11 94.6 1,017.90 833,664 820,002 866,694 22,040
Yesterday 2026-01-10 94.8 1,017.96 834,987 821,325 866,694 22,050
2 days ago 2026-01-09 94.8 1,017.98 835,428 821,766 866,694 22,054
1 week ago 2026-01-04 95.3 1,018.18 839,842 826,180 866,694 22,088
1 month ago 2025-12-11 97.4 1,019.01 858,237 844,575 866,694 22,241
3 months ago 2025-10-11 95.2 1,018.13 838,738 825,076 866,694 22,080
6 months ago 2025-07-11 85.0 1,014.06 750,596 736,934 866,694 21,140
1 year ago 2025-01-11 60.7 1,003.02 539,364 525,702 866,694 17,029
*

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 2026-01-11 22:30 1,017.89 1,020.00 -2.11
1 hour prior 2026-01-11 21:30 1,017.89 1,020.00 -2.11
2 hours prior 2026-01-11 20:30 1,017.89 1,020.00 -2.11
6 hours prior 2026-01-11 16:30 1,017.88 1,020.00 -2.12
12 hours prior 2026-01-11 10:30 1,017.89 1,020.00 -2.11
24 hours prior 2026-01-10 22:30 1,017.92 1,020.00 -2.08
48 hours prior 2026-01-09 22:30 1,017.98 1,020.00 -2.02
*

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