Notes

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: 76.2% full as of 2022-07-01

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 2022-07-01 76.2 1,008.50 637,930 622,728 816,904 18,770
Yesterday 2022-06-30 76.4 1,008.56 639,057 623,856 816,904 18,796
2 days ago 2022-06-29 76.6 1,008.68 641,316 626,114 816,904 18,851
1 week ago 2022-06-24 77.9 1,009.20 651,176 635,974 816,904 19,067
1 month ago 2022-06-01 84.9 1,012.15 709,025 693,824 816,904 20,188
3 months ago 2022-04-01 87.7 1,015.08 769,550 754,348 860,607 21,090
6 months ago 2022-01-01 88.1 1,015.26 773,351 758,150 860,607 21,136
1 year ago 2021-07-01 96.4 1,016.64 802,741 787,540 816,904 21,455
*

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 2022-07-01 06:30 1,008.50 1,018.00 -9.50 below flood pool
1 hour prior 2022-07-01 05:30 1,008.50 1,018.00 -9.50 below flood pool
2 hours prior 2022-07-01 04:30 1,008.50 1,018.00 -9.50 below flood pool
6 hours prior 2022-07-01 00:30 1,008.50 1,018.00 -9.50 below flood pool
12 hours prior 2022-06-30 18:30 - n.a. - - n.a. - - n.a. - into flood pool
24 hours prior 2022-06-30 06:30 - n.a. - - n.a. - - n.a. - into flood pool
48 hours prior 2022-06-29 06:30 1,008.75 1,018.00 -9.25 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