Lake Tawakoni: 97.6% full as of 2019-08-21

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 2019-08-21 97.6 436.94 851,154 851,146 871,685 36,366
1 day prior 2019-08-20 97.8 436.97 852,246 852,238 871,685 36,397
2 days prior 2019-08-19 97.9 436.99 852,973 852,965 871,685 36,417
1 week prior 2019-08-14 98.4 437.13 858,083 858,075 871,685 36,565
1 month prior 2019-07-21 100.0 437.67 877,993 871,685 871,685 - n.a. -
3 months prior 2019-05-21 100.0 439.30 939,999 871,685 871,685 - n.a. -
6 months prior 2019-02-21 100.0 438.61 913,401 871,685 871,685 - n.a. -
1 year prior 2018-08-21 91.6 435.47 798,672 798,664 871,685 35,099
*

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 2019-08-21 22:15 436.92 437.50 -0.58 below flood pool
1 hour prior 2019-08-21 21:15 436.93 437.50 -0.57 below flood pool
2 hours prior 2019-08-21 20:15 436.92 437.50 -0.58 below flood pool
6 hours prior 2019-08-21 16:15 436.93 437.50 -0.57 below flood pool
12 hours prior 2019-08-21 10:15 436.95 437.50 -0.55 below flood pool
24 hours prior 2019-08-20 22:15 436.96 437.50 -0.54 below flood pool
48 hours prior 2019-08-19 22:15 436.98 437.50 -0.52 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