Lewisville Lake: 84.3% full as of 2026-10-04
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 | 2026-10-04 | 84.3 | 518.58 | 510,268 | 474,594 | 563,228 | 24,800 |
| Yesterday | 2026-10-03 | 84.2 | 518.56 | 509,772 | 474,098 | 563,228 | 24,786 |
| 2 days ago | 2026-10-02 | 84.1 | 518.54 | 509,277 | 473,603 | 563,228 | 24,771 |
| 1 week ago | 2026-09-27 | 82.9 | 518.26 | 502,370 | 466,696 | 563,228 | 24,562 |
| 1 month ago | 2026-09-04 | 88.1 | 519.44 | 531,862 | 496,188 | 563,228 | 25,404 |
| 3 months ago | 2026-07-04 | 100.0 | 522.89 | 623,216 | 563,228 | 563,228 | - n.a. - |
| 6 months ago | 2026-04-04 | 100.0 | 522.40 | 609,760 | 563,228 | 563,228 | - n.a. - |
| 1 year ago | 2025-10-04 | 95.4 | 521.03 | 573,027 | 537,353 | 563,228 | 26,359 |
*
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 | 2026-10-04 16:15 | 518.59 | 522.00 | -3.41 |
| 1 hour prior | 2026-10-04 15:15 | 518.60 | 522.00 | -3.40 |
| 2 hours prior | 2026-10-04 14:15 | 518.59 | 522.00 | -3.41 |
| 6 hours prior | 2026-10-04 10:15 | 518.57 | 522.00 | -3.43 |
| 12 hours prior | 2026-10-04 04:15 | 518.58 | 522.00 | -3.42 |
| 24 hours prior | 2026-10-03 16:15 | 518.58 | 522.00 | -3.42 |
| 48 hours prior | 2026-10-02 16:15 | 518.55 | 522.00 | -3.45 |
*
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
