Lewisville Lake: 95.0% full as of 2019-09-20

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 2019-09-20 95.0 520.95 570,920 535,246 563,228 26,312
Yesterday 2019-09-19 95.1 520.96 571,183 535,509 563,228 26,318
2 days ago 2019-09-18 95.2 520.98 571,709 536,035 563,228 26,329
1 week ago 2019-09-13 95.8 521.11 575,136 539,462 563,228 26,408
1 month ago 2019-08-20 98.1 521.60 588,151 552,477 563,228 26,723
3 months ago 2019-06-20 100.0 526.75 735,062 563,228 563,228 - n.a. -
6 months ago 2019-03-20 100.0 522.94 624,598 563,228 563,228 - n.a. -
1 year ago 2018-09-20 87.0 519.19 525,531 489,857 563,228 25,237
*

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 2019-09-20 14:15 520.93 522.00 -1.07 below flood pool
1 hour prior 2019-09-20 13:15 520.93 522.00 -1.07 below flood pool
2 hours prior 2019-09-20 12:15 520.93 522.00 -1.07 below flood pool
6 hours prior 2019-09-20 08:15 520.94 522.00 -1.06 below flood pool
12 hours prior 2019-09-20 02:15 520.95 522.00 -1.05 below flood pool
24 hours prior 2019-09-19 14:15 520.96 522.00 -1.04 below flood pool
48 hours prior 2019-09-18 14:15 520.98 522.00 -1.02 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 481.00 ft above NGVD29
Emergency spillway crest elevation 532.00 ft above NGVD29
Flood pool elevation 532.00 ft above NGVD29
Maximum design elevation 552.14 ft above NGVD29
Maximum design elevation 553.00 ft above NGVD29
Top of dam elevation 560.00 ft above NGVD29
Conservation pool elevation 522.00 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