Lewisville Lake: 99.1% full as of 2017-03-23

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, 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)
Most recent 2017-03-23 99.1 521.81 593,780 558,106 563,228 26,878
1 day prior 2017-03-22 99.2 521.83 594,318 558,644 563,228 26,895
2 days prior 2017-03-21 99.2 521.84 594,587 558,913 563,228 26,903
1 week prior 2017-03-16 99.5 521.89 595,933 560,259 563,228 26,945
1 month prior 2017-02-23 100.0 522.32 607,580 563,228 563,228 - n.a. -
3 months prior 2016-12-23 99.8 521.96 597,822 562,148 563,228 27,086
6 months prior 2016-09-23 97.4 521.46 584,418 548,744 563,228 26,628
1 year prior 2016-03-23 100.0 524.20 660,009 563,228 563,228 - n.a. -
*

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 2017-03-24 00:15 521.78 522.0 -0.2 below flood pool
1 hour prior 2017-03-23 23:15 521.78 522.0 -0.2 below flood pool
2 hours prior 2017-03-23 22:15 521.78 522.0 -0.2 below flood pool
6 hours prior 2017-03-23 18:15 521.79 522.0 -0.2 below flood pool
12 hours prior 2017-03-23 12:15 521.82 522.0 -0.2 below flood pool
24 hours prior 2017-03-23 00:15 521.83 522.0 -0.2 below flood pool
48 hours prior 2017-03-22 00:15 521.83 522.0 -0.2 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1955-01-01
Vertical datum NGVD29
Gauge USGS:08052800
Dead pool elevation 481 ft above NGVD29
Conservation pool elevation 522 ft above NGVD29
Emergency spillway crest elevation 532 ft above NGVD29
Flood pool elevation 532 ft above NGVD29
Maximum design elevation 552.14 ft above NGVD29
Maximum design elevation 553 ft above NGVD29
Top of dam elevation 560 ft above NGVD29
Data download (CSV) period of record, last one year, last 30 days

Elevation-Area-Capacity Curves

2007-09-01 (source: twdb) : GIS Data

Lake Location