Recent changes

2013-05-08: The rating curve for this reservoir has been updated and replaced with the most recent data from the TWDB Hydrosurvey Program.

Lake Texana: 99.0% full as of 2017-09-23

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 2017-09-23 99.0 43.82 158,194 157,915 159,566 9,146
Yesterday 2017-09-22 98.6 43.75 157,554 157,275 159,566 9,127
2 days ago 2017-09-21 97.8 43.62 156,370 156,091 159,566 9,092
1 week ago 2017-09-16 98.6 43.75 157,554 157,275 159,566 9,127
1 month ago 2017-08-23 84.7 41.24 135,424 135,145 159,566 8,526
3 months ago 2017-06-23 93.0 42.76 148,646 148,367 159,566 8,876
6 months ago 2017-03-23 99.5 43.91 159,018 158,739 159,566 9,219
1 year ago 2016-09-23 97.9 43.64 156,552 156,273 159,566 9,097
*

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 2017-09-23 07:00 43.82 44.0 -0.2 below flood pool
1 hour prior 2017-09-23 06:00 43.82 44.0 -0.2 below flood pool
2 hours prior 2017-09-23 05:00 43.82 44.0 -0.2 below flood pool
6 hours prior 2017-09-23 01:00 43.82 44.0 -0.2 below flood pool
12 hours prior 2017-09-22 19:00 43.82 44.0 -0.2 below flood pool
24 hours prior 2017-09-22 07:00 43.66 44.0 -0.3 below flood pool
48 hours prior 2017-09-21 07:00 43.60 44.0 -0.4 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1981-01-01
Vertical datum NGVD29
Gauge USGS:08164525
Dead pool elevation 4.0 ft above NGVD29
Service spillway crest elevation 23.0 ft above NGVD29
Top of flood gate elevation 45.0 ft above NGVD29
Emergency spillway crest elevation 45.0 ft above NGVD29
Maximum design elevation 47.0 ft above NGVD29
Top of dam elevation 55.0 ft above NGVD29
Conservation pool elevation 44.0 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2010-03-01 (source: twdb) : GIS Data

Lake Location