Lewisville Lake: 92.2% full as of 2026-08-19
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 | 2026-08-19 | 92.2 | 520.33 | 554,720 | 519,046 | 563,228 | 25,947 |
| Yesterday | 2026-08-18 | 92.4 | 520.39 | 556,278 | 520,604 | 563,228 | 25,981 |
| 2 days ago | 2026-08-17 | 92.7 | 520.45 | 557,839 | 522,165 | 563,228 | 26,016 |
| 1 week ago | 2026-08-12 | 94.1 | 520.75 | 565,670 | 529,996 | 563,228 | 26,193 |
| 1 month ago | 2026-07-19 | 100.0 | 522.03 | 599,713 | 563,228 | 563,228 | - n.a. - |
| 3 months ago | 2026-05-19 | 100.0 | 522.11 | 601,876 | 563,228 | 563,228 | - n.a. - |
| 6 months ago | 2026-02-19 | 100.0 | 522.16 | 603,232 | 563,228 | 563,228 | - n.a. - |
| 1 year ago | 2025-08-19 | 93.9 | 520.71 | 564,622 | 528,948 | 563,228 | 26,169 |
*
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 | 2026-08-19 22:15 | 520.32 | 522.00 | -1.68 |
| 1 hour prior | 2026-08-19 21:15 | 520.33 | 522.00 | -1.67 |
| 2 hours prior | 2026-08-19 20:15 | 520.33 | 522.00 | -1.67 |
| 6 hours prior | 2026-08-19 16:15 | 520.31 | 522.00 | -1.69 |
| 12 hours prior | 2026-08-19 10:15 | 520.30 | 522.00 | -1.70 |
| 24 hours prior | 2026-08-18 22:15 | 520.38 | 522.00 | -1.62 |
| 48 hours prior | 2026-08-17 22:15 | 520.44 | 522.00 | -1.56 |
*
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
