Recent changes

2013-06-19: The vertical datums of gauge, conservation pool and dead pool elevations for this lake have been adjusted to NGVD29+0.01ft.

Lake Buchanan: 93.1% full as of 2021-09-23

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 2021-09-23 93.1 1,015.39 776,101 760,900 816,904 21,168
Yesterday 2021-09-22 93.3 1,015.45 777,372 762,170 816,904 21,182
2 days ago 2021-09-21 93.5 1,015.52 778,855 763,654 816,904 21,199
1 week ago 2021-09-16 93.9 1,015.69 782,462 767,260 816,904 21,239
1 month ago 2021-08-23 96.1 1,016.51 799,954 784,752 816,904 21,425
3 months ago 2021-06-23 96.7 1,016.75 805,102 789,900 816,904 21,481
6 months ago 2021-03-23 82.9 1,013.10 728,363 713,162 860,607 20,511
1 year ago 2020-09-23 93.3 1,015.45 777,372 762,170 816,904 21,182
*

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 2021-09-23 19:30 1,015.37 1,018.00 -2.63 below flood pool
1 hour prior 2021-09-23 18:30 - n.a. - - n.a. - - n.a. - into flood pool
2 hours prior 2021-09-23 17:30 - n.a. - - n.a. - - n.a. - into flood pool
6 hours prior 2021-09-23 13:30 1,015.38 1,018.00 -2.62 below flood pool
12 hours prior 2021-09-23 07:30 - n.a. - - n.a. - - n.a. - into flood pool
24 hours prior 2021-09-22 19:30 - n.a. - - n.a. - - n.a. - into flood pool
48 hours prior 2021-09-21 19:30 1,015.52 1,018.00 -2.48 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1938-01-01
Vertical datum NGVD29 +0.01
Gauge LCRA:1995
Dead pool elevation 937.50 ft above NGVD29 +0.01
Service spillway crest elevation 1,020.50 ft above NGVD29
Top of flood gate elevation 1,020.50 ft above NGVD29
Emergency spillway crest elevation 1,020.50 ft above NGVD29
Maximum design elevation 1,024.00 ft above NGVD29
Top of dam elevation 1,025.00 ft above NGVD29
Conservation pool elevation
ending 1990-03-08
1,020.50 ft above NGVD29 +0.01
Conservation pool elevation
1990-03-08 to 1990-05-01
1,020.00 ft above NGVD29 +0.01
Conservation pool elevation
seasonal: May 1 to November 1 starting 1990-05-01
1,018.00 ft above NGVD29 +0.01
Conservation pool elevation
seasonal: November 1 to May 1 starting 1990-05-01
1,020.00 ft above NGVD29 +0.01
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2006-03-01 (source: twdb) : GIS Data

Lake Location