Lake Tawakoni: 90.4% full as of 2026-09-30
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 | 2026-09-30 | 90.4 | 435.17 | 788,176 | 788,168 | 871,685 | 34,878 |
| 1 day prior | 2026-09-29 | 90.5 | 435.19 | 788,874 | 788,866 | 871,685 | 34,893 |
| 2 days prior | 2026-09-28 | 90.7 | 435.23 | 790,270 | 790,262 | 871,685 | 34,922 |
| 1 week prior | 2026-09-23 | 91.4 | 435.41 | 796,567 | 796,559 | 871,685 | 35,054 |
| 1 month prior | 2026-08-30 | 94.1 | 436.07 | 819,872 | 819,864 | 871,685 | 35,573 |
| 3 months prior | 2026-06-30 | 100.0 | 437.64 | 876,878 | 871,685 | 871,685 | - n.a. - |
| 6 months prior | 2026-03-30 | 96.1 | 436.58 | 838,126 | 838,118 | 871,685 | 36,019 |
| 1 year prior | 2025-09-30 | 96.3 | 436.62 | 839,567 | 839,559 | 871,685 | 36,056 |
*
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 | 2026-09-30 23:15 | 435.21 | 437.50 | -2.29 |
| 1 hour prior | 2026-09-30 22:15 | 435.20 | 437.50 | -2.30 |
| 2 hours prior | 2026-09-30 21:15 | 435.21 | 437.50 | -2.29 |
| 6 hours prior | 2026-09-30 17:15 | 435.14 | 437.50 | -2.36 |
| 12 hours prior | 2026-09-30 11:15 | 435.14 | 437.50 | -2.36 |
| 24 hours prior | 2026-09-29 23:15 | 435.17 | 437.50 | -2.33 |
| 48 hours prior | 2026-09-28 23:15 | 435.22 | 437.50 | -2.28 |
*
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
