Lake Tawakoni: 89.8% full as of 2026-10-21
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 | 2026-10-21 | 89.8 | 435.01 | 782,604 | 782,596 | 871,685 | 34,764 |
| Yesterday | 2026-10-20 | 89.8 | 435.02 | 782,952 | 782,944 | 871,685 | 34,771 |
| 2 days ago | 2026-10-19 | 90.0 | 435.06 | 784,344 | 784,336 | 871,685 | 34,800 |
| 1 week ago | 2026-10-14 | 90.9 | 435.28 | 792,017 | 792,009 | 871,685 | 34,958 |
| 1 month ago | 2026-09-21 | 91.6 | 435.47 | 798,672 | 798,664 | 871,685 | 35,099 |
| 3 months ago | 2026-07-21 | 99.4 | 437.37 | 866,891 | 866,883 | 871,685 | 36,851 |
| 6 months ago | 2026-04-21 | 98.6 | 437.16 | 859,181 | 859,173 | 871,685 | 36,598 |
| 1 year ago | 2025-10-21 | 94.5 | 436.17 | 823,434 | 823,426 | 871,685 | 35,658 |
*
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 | 2026-10-21 04:15 | 435.00 | 437.50 | -2.50 |
| 1 hour prior | 2026-10-21 03:15 | 435.01 | 437.50 | -2.49 |
| 2 hours prior | 2026-10-21 02:15 | 435.01 | 437.50 | -2.49 |
| 6 hours prior | 2026-10-20 22:15 | 435.01 | 437.50 | -2.49 |
| 12 hours prior | 2026-10-20 16:15 | 435.03 | 437.50 | -2.47 |
| 24 hours prior | 2026-10-20 04:15 | 435.03 | 437.50 | -2.47 |
| 48 hours prior | 2026-10-19 04:15 | 435.07 | 437.50 | -2.43 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1960-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 378.00 ft above NGVD29 |
| Emergency spillway crest elevation | 437.50 ft above NGVD29 |
| Top of dam elevation | 454.00 ft above NGVD29 |
| Conservation pool elevation | 437.50 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1960-01-01 (source: USGS)
2000-10-01 (source: USGS)
2009-08-01 (source: TWDB)
: GIS Data
|
|
| Data Source | USGS:08017400 |
| USGS Monitoring Location | USGS:08017400 |
Lake Location
