Choke Canyon Reservoir: 23.3% full as of 2026-09-01
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 | 2026-09-01 | 23.3 | 191.91 | 154,633 | 154,632 | 662,820 | 10,689 |
| Yesterday | 2026-08-31 | 23.4 | 191.93 | 154,847 | 154,846 | 662,820 | 10,697 |
| 2 days ago | 2026-08-30 | 23.4 | 191.96 | 155,169 | 155,168 | 662,820 | 10,709 |
| 1 week ago | 2026-08-25 | 23.7 | 192.12 | 156,887 | 156,886 | 662,820 | 10,773 |
| 1 month ago | 2026-08-01 | 25.0 | 192.90 | 165,414 | 165,413 | 662,820 | 11,102 |
| 3 months ago | 2026-06-01 | 8.3 | 179.67 | 54,885 | 54,884 | 662,820 | 5,585 |
| 6 months ago | 2026-03-01 | 8.4 | 179.79 | 55,558 | 55,557 | 662,820 | 5,638 |
| 1 year ago | 2025-09-01 | 11.9 | 183.47 | 79,091 | 79,090 | 662,820 | 7,152 |
*
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 | 2026-09-01 23:15 | 191.88 | 220.50 | -28.62 |
| 1 hour prior | 2026-09-01 22:15 | 191.87 | 220.50 | -28.63 |
| 2 hours prior | 2026-09-01 21:15 | 191.87 | 220.50 | -28.63 |
| 6 hours prior | 2026-09-01 17:15 | 191.91 | 220.50 | -28.59 |
| 12 hours prior | 2026-09-01 11:15 | 191.91 | 220.50 | -28.59 |
| 24 hours prior | 2026-08-31 23:15 | 191.90 | 220.50 | -28.60 |
| 48 hours prior | 2026-08-30 23:15 | 191.94 | 220.50 | -28.56 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1982-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 136.40 ft above NGVD29 |
| Service spillway crest elevation | 199.50 ft above NGVD29 |
| Emergency spillway crest elevation | 223.20 ft above NGVD29 |
| Maximum design elevation | 232.18 ft above NGVD29 |
| Top of dam elevation | 241.14 ft above NGVD29 |
| Conservation pool elevation | 220.50 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1983-01-01 (source: USBR)
1993-03-01 (source: TWDB)
: GIS Data
2012-06-01 (source: TWDB)
: GIS Data
|
|
| Data Source | USGS:08206900 |
| USGS Monitoring Location | USGS:08206900 |
Lake Location
