Lake Buchanan: 56.4% full as of 2025-03-26

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 2025-03-26 56.4 1,000.76 502,070 488,408 866,694 15,974
Yesterday 2025-03-25 56.4 1,000.78 502,389 488,727 866,694 15,982
2 days ago 2025-03-24 56.5 1,000.84 503,349 489,687 866,694 16,007
1 week ago 2025-03-19 57.1 1,001.16 508,494 494,832 866,694 16,152
1 month ago 2025-02-26 58.6 1,001.95 521,403 507,741 866,694 16,532
3 months ago 2024-12-26 61.7 1,003.57 548,794 535,132 866,694 17,255
6 months ago 2024-09-26 67.3 1,004.61 566,935 553,273 822,207 17,627
1 year ago 2024-03-26 46.4 995.01 415,639 401,977 866,694 14,227
*

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 2025-03-26 06:00 1,000.76 1,020.00 -19.24
1 hour prior 2025-03-26 05:00 1,000.75 1,020.00 -19.25
2 hours prior 2025-03-26 04:00 1,000.76 1,020.00 -19.24
6 hours prior 2025-03-26 00:00 1,000.76 1,020.00 -19.24
12 hours prior 2025-03-25 18:00 - n.a. - - n.a. - - n.a. -
24 hours prior 2025-03-25 06:00 - n.a. - - n.a. - - n.a. -
48 hours prior 2025-03-24 06:00 1,000.88 1,020.00 -19.12
*

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: 1990-05-01 (Seasonal: May 1 to November 1) 		1,018.00 ft above NAVD88 +0.26
Conservation pool elevation
Start date: 1990-05-01 (Seasonal: November 1 to May 1) 		1,020.00 ft above NAVD88 +0.26
Conservation pool elevation
End date: 1990-03-08 		1,020.50 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
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