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: 95.2% full as of 2018-11-21

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 2018-11-21 95.2 1,018.10 834,276 819,074 860,607 21,716
Yesterday 2018-11-20 95.2 1,018.12 834,711 819,510 860,607 21,719
2 days ago 2018-11-19 95.2 1,018.12 834,711 819,510 860,607 21,719
1 week ago 2018-11-14 94.9 1,017.98 831,672 816,470 860,607 21,700
1 month ago 2018-10-21 100.0 1,019.10 856,065 816,904 816,904 21,864
3 months ago 2018-08-21 81.7 1,010.83 682,722 667,520 816,904 19,653
6 months ago 2018-05-21 94.1 1,015.76 783,949 768,748 816,904 21,254
1 year ago 2017-11-21 89.1 1,015.68 782,250 767,048 860,607 21,237
*

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 2018-11-21 12:15 1,018.02 1,020.0 -2.0 below flood pool
1 hour prior 2018-11-21 11:15 - n.a. - - n.a. - - n.a. - into flood pool
2 hours prior 2018-11-21 10:15 - n.a. - - n.a. - - n.a. - into flood pool
6 hours prior 2018-11-21 06:15 1,018.15 1,020.0 -1.9 below flood pool
12 hours prior 2018-11-21 00:15 1,018.15 1,020.0 -1.9 below flood pool
24 hours prior 2018-11-20 12:15 - n.a. - - n.a. - - n.a. - into flood pool
48 hours prior 2018-11-19 12:15 1,018.11 1,020.0 -1.9 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 937.5 ft above NGVD29 +0.01
Service spillway crest elevation 1,020.5 ft above NGVD29
Top of flood gate elevation 1,020.5 ft above NGVD29
Emergency spillway crest elevation 1,020.5 ft above NGVD29
Maximum design elevation 1,024.0 ft above NGVD29
Top of dam elevation 1,025.0 ft above NGVD29
Conservation pool elevation
ending 1990-03-08
1,020.5 ft above NGVD29 +0.01
Conservation pool elevation
1990-03-08 to 1990-05-01
1,020.0 ft above NGVD29 +0.01
Conservation pool elevation
seasonal: May 1 to November 1 starting 1990-05-01
1,018.0 ft above NGVD29 +0.01
Conservation pool elevation
seasonal: November 1 to May 1 starting 1990-05-01
1,020.0 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