Lake Tawakoni: 100.0% full as of 2017-08-20

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, while 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 2017-08-20 100.0 438.01 890,689 871,685 871,685 - n.a. -
Yesterday 2017-08-19 100.0 437.92 887,316 871,685 871,685 - n.a. -
2 days ago 2017-08-18 100.0 437.59 875,023 871,685 871,685 - n.a. -
1 week ago 2017-08-13 94.1 436.08 820,227 820,219 871,685 35,582
1 month ago 2017-07-20 94.2 436.10 820,939 820,931 871,685 35,598
3 months ago 2017-05-20 91.5 435.45 797,971 797,963 871,685 35,084
6 months ago 2017-02-20 88.9 434.80 775,319 775,311 871,685 34,616
1 year ago 2016-08-20 96.1 436.56 837,406 837,398 871,685 36,001
*

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 2017-08-20 21:30 437.99 437.5 0.5 into flood pool
1 hour prior 2017-08-20 20:30 438.00 437.5 0.5 into flood pool
2 hours prior 2017-08-20 19:30 438.00 437.5 0.5 into flood pool
6 hours prior 2017-08-20 15:30 438.01 437.5 0.5 into flood pool
12 hours prior 2017-08-20 09:30 438.02 437.5 0.5 into flood pool
24 hours prior 2017-08-19 21:30 438.00 437.5 0.5 into flood pool
48 hours prior 2017-08-18 21:30 437.71 437.5 0.2 into 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 378.0 ft above NGVD29
Conservation pool elevation 437.5 ft above NGVD29
Emergency spillway crest elevation 437.5 ft above NGVD29
Top of dam elevation 454 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