Lake Tawakoni: 95.2% full as of 2020-09-20

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 2020-09-20 95.2 436.35 829,865 829,857 871,685 35,813
Yesterday 2020-09-19 95.3 436.38 830,940 830,932 871,685 35,839
2 days ago 2020-09-18 95.4 436.41 832,015 832,007 871,685 35,865
1 week ago 2020-09-13 95.9 436.52 835,966 835,958 871,685 35,964
1 month ago 2020-08-20 95.5 436.43 832,733 832,725 871,685 35,883
3 months ago 2020-06-20 100.0 437.61 875,764 871,685 871,685 - n.a. -
6 months ago 2020-03-20 100.0 440.33 980,663 871,685 871,685 - n.a. -
1 year ago 2019-09-20 96.1 436.57 837,766 837,758 871,685 36,010
*

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 2020-09-20 14:15 436.34 437.50 -1.16 below flood pool
1 hour prior 2020-09-20 13:15 436.35 437.50 -1.15 below flood pool
2 hours prior 2020-09-20 12:15 436.35 437.50 -1.15 below flood pool
6 hours prior 2020-09-20 08:15 436.35 437.50 -1.15 below flood pool
12 hours prior 2020-09-20 02:15 436.36 437.50 -1.14 below flood pool
24 hours prior 2020-09-19 14:15 436.38 437.50 -1.12 below flood pool
48 hours prior 2020-09-18 14:15 436.41 437.50 -1.09 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1960-01-01
Vertical datum NGVD29
Gauge USGS:08017400
Dead pool elevation 378.00 ft above NGVD29
Emergency spillway crest elevation 437.50 ft above NGVD29
Top of dam elevation 454.00 ft above NGVD29
Conservation pool elevation 437.50 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

1960-01-01 (source: usgs)
2000-10-01 (source: usgs)
2009-08-01 (source: twdb) : GIS Data

Lake Location