Lewisville Lake: 85.6% full as of 2024-12-20

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)
Most recent 2024-12-20 85.6 518.89 517,992 482,318 563,228 25,027
1 day prior 2024-12-19 85.7 518.90 518,242 482,568 563,228 25,035
2 days prior 2024-12-18 85.7 518.91 518,492 482,818 563,228 25,042
1 week prior 2024-12-13 85.0 518.75 514,495 478,821 563,228 24,926
1 month prior 2024-11-20 86.4 519.06 522,256 486,582 563,228 25,148
3 months prior 2024-09-20 94.1 520.74 565,408 529,734 563,228 26,187
6 months prior 2024-06-20 100.0 528.89 801,544 563,228 563,228 - n.a. -
1 year prior 2023-12-20 87.1 519.22 526,289 490,615 563,228 25,257
*

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 2024-12-21 05:15 518.86 522.00 -3.14 below flood pool
1 hour prior 2024-12-21 04:15 518.89 522.00 -3.11 below flood pool
2 hours prior 2024-12-21 03:15 518.91 522.00 -3.09 below flood pool
6 hours prior 2024-12-20 23:15 518.86 522.00 -3.14 below flood pool
12 hours prior 2024-12-20 17:15 518.88 522.00 -3.12 below flood pool
24 hours prior 2024-12-20 05:15 518.89 522.00 -3.11 below flood pool
48 hours prior 2024-12-19 05:15 518.91 522.00 -3.09 below flood pool
*

Data is provisional and subject to revision.

Additional Information

Impoundment date 1955-01-01
Vertical datum NGVD29
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
Data Source USGS:08052800

Lake Location