Lewisville Lake: 82.6% full as of 2026-10-18
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 | 2026-10-18 | 82.6 | 518.21 | 501,143 | 465,469 | 563,228 | 24,524 |
| 1 day prior | 2026-10-17 | 82.7 | 518.23 | 501,634 | 465,960 | 563,228 | 24,539 |
| 2 days prior | 2026-10-16 | 83.4 | 518.38 | 505,323 | 469,649 | 563,228 | 24,652 |
| 1 week prior | 2026-10-11 | 83.6 | 518.44 | 506,804 | 471,130 | 563,228 | 24,697 |
| 1 month prior | 2026-09-18 | 84.9 | 518.73 | 513,997 | 478,323 | 563,228 | 24,911 |
| 3 months prior | 2026-07-18 | 100.0 | 522.08 | 601,064 | 563,228 | 563,228 | - n.a. - |
| 6 months prior | 2026-04-18 | 100.0 | 522.12 | 602,147 | 563,228 | 563,228 | - n.a. - |
| 1 year prior | 2025-10-18 | 93.2 | 520.55 | 560,442 | 524,768 | 563,228 | 26,075 |
*
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 | 2026-10-19 03:15 | 518.19 | 522.00 | -3.81 |
| 1 hour prior | 2026-10-19 02:15 | 518.19 | 522.00 | -3.81 |
| 2 hours prior | 2026-10-19 01:15 | 518.19 | 522.00 | -3.81 |
| 6 hours prior | 2026-10-18 21:15 | 518.17 | 522.00 | -3.83 |
| 12 hours prior | 2026-10-18 15:15 | 518.21 | 522.00 | -3.79 |
| 24 hours prior | 2026-10-18 03:15 | 518.19 | 522.00 | -3.81 |
| 48 hours prior | 2026-10-17 03:15 | 518.24 | 522.00 | -3.76 |
*
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 |
| USGS Monitoring Location | USGS:08052800 |
Lake Location
