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: 100.0% full as of 2021-05-13

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 2021-05-13 100.0 44.02 160,029 159,566 159,566 - n.a. -
1 day prior 2021-05-12 100.0 44.05 160,305 159,566 159,566 - n.a. -
2 days prior 2021-05-11 99.8 43.97 159,569 159,290 159,566 9,523
1 week prior 2021-05-06 99.9 43.98 159,661 159,382 159,566 9,574
1 month prior 2021-04-13 91.7 42.53 146,610 146,331 159,566 8,821
3 months prior 2021-02-13 98.1 43.67 156,825 156,546 159,566 9,105
6 months prior 2020-11-13 93.9 42.92 150,069 149,790 159,566 8,915
1 year prior 2020-05-13 89.5 42.12 143,013 142,734 159,566 8,725
*

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 2021-05-13 23:00 44.01 44.00 0.01 into flood pool
1 hour prior 2021-05-13 22:00 44.01 44.00 0.01 into flood pool
2 hours prior 2021-05-13 21:00 44.01 44.00 0.01 into flood pool
6 hours prior 2021-05-13 17:00 44.02 44.00 0.02 into flood pool
12 hours prior 2021-05-13 11:00 44.02 44.00 0.02 into flood pool
24 hours prior 2021-05-12 23:00 44.04 44.00 0.04 into flood pool
48 hours prior 2021-05-11 23:00 43.99 44.00 -0.01 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 4.00 ft above NGVD29
Service spillway crest elevation 23.00 ft above NGVD29
Top of flood gate elevation 45.00 ft above NGVD29
Emergency spillway crest elevation 45.00 ft above NGVD29
Maximum design elevation 47.00 ft above NGVD29
Top of dam elevation 55.00 ft above NGVD29
Conservation pool elevation 44.00 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