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: 82.3% full as of 2018-09-21

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)
Most recent 2018-09-21 82.3 1,011.06 687,252 672,050 816,904 19,748
1 day prior 2018-09-20 82.2 1,011.02 686,463 671,262 816,904 19,730
2 days prior 2018-09-19 82.1 1,010.99 685,871 670,670 816,904 19,717
1 week prior 2018-09-14 81.5 1,010.74 680,954 665,752 816,904 19,618
1 month prior 2018-08-21 81.7 1,010.83 682,722 667,520 816,904 19,653
3 months prior 2018-06-21 91.1 1,014.59 759,249 744,048 816,904 20,953
6 months prior 2018-03-21 89.8 1,015.95 787,992 772,790 860,607 21,297
1 year prior 2017-09-21 95.4 1,016.25 794,391 779,190 816,904 21,365
*

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 2018-09-21 23:30 1,011.09 1,018.0 -6.9 below flood pool
1 hour prior 2018-09-21 22:30 - n.a. - - n.a. - - n.a. - into flood pool
2 hours prior 2018-09-21 21:30 1,011.08 1,018.0 -6.9 below flood pool
6 hours prior 2018-09-21 17:30 1,011.06 1,018.0 -6.9 below flood pool
12 hours prior 2018-09-21 11:30 - n.a. - - n.a. - - n.a. - into flood pool
24 hours prior 2018-09-20 23:30 1,011.06 1,018.0 -6.9 below flood pool
48 hours prior 2018-09-19 23:30 1,011.00 1,018.0 -7.0 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