Lewisville Lake: 91.6% full as of 2026-08-22
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 | 2026-08-22 | 91.6 | 520.20 | 551,352 | 515,678 | 563,228 | 25,872 |
| Yesterday | 2026-08-21 | 91.6 | 520.22 | 551,870 | 516,196 | 563,228 | 25,884 |
| 2 days ago | 2026-08-20 | 91.9 | 520.27 | 553,164 | 517,490 | 563,228 | 25,912 |
| 1 week ago | 2026-08-15 | 93.2 | 520.55 | 560,442 | 524,768 | 563,228 | 26,075 |
| 1 month ago | 2026-07-22 | 99.5 | 521.89 | 595,933 | 560,259 | 563,228 | 26,945 |
| 3 months ago | 2026-05-22 | 100.0 | 522.29 | 606,763 | 563,228 | 563,228 | - n.a. - |
| 6 months ago | 2026-02-22 | 100.0 | 522.11 | 601,876 | 563,228 | 563,228 | - n.a. - |
| 1 year ago | 2025-08-22 | 93.5 | 520.62 | 562,269 | 526,595 | 563,228 | 26,116 |
*
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 | 2026-08-22 12:15 | 520.15 | 522.00 | -1.85 |
| 1 hour prior | 2026-08-22 11:15 | 520.15 | 522.00 | -1.85 |
| 2 hours prior | 2026-08-22 10:15 | 520.19 | 522.00 | -1.81 |
| 6 hours prior | 2026-08-22 06:15 | 520.20 | 522.00 | -1.80 |
| 12 hours prior | 2026-08-22 00:15 | 520.22 | 522.00 | -1.78 |
| 24 hours prior | 2026-08-21 12:15 | 520.22 | 522.00 | -1.78 |
| 48 hours prior | 2026-08-20 12:15 | 520.24 | 522.00 | -1.76 |
*
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
