Choke Canyon Reservoir: 22.4% full as of 2026-09-20
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 | 2026-09-20 | 22.4 | 191.35 | 148,710 | 148,709 | 662,820 | 10,466 |
| Yesterday | 2026-09-19 | 22.5 | 191.37 | 148,920 | 148,919 | 662,820 | 10,474 |
| 2 days ago | 2026-09-18 | 22.5 | 191.38 | 149,024 | 149,023 | 662,820 | 10,478 |
| 1 week ago | 2026-09-13 | 22.7 | 191.52 | 150,495 | 150,494 | 662,820 | 10,533 |
| 1 month ago | 2026-08-20 | 23.9 | 192.29 | 158,724 | 158,723 | 662,820 | 10,839 |
| 3 months ago | 2026-06-20 | 8.7 | 180.13 | 57,500 | 57,499 | 662,820 | 5,778 |
| 6 months ago | 2026-03-20 | 8.0 | 179.34 | 53,065 | 53,064 | 662,820 | 5,447 |
| 1 year ago | 2025-09-20 | 11.4 | 182.97 | 75,566 | 75,565 | 662,820 | 6,949 |
*
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 | 2026-09-20 09:15 | 191.36 | 220.50 | -29.14 |
| 1 hour prior | 2026-09-20 08:15 | 191.35 | 220.50 | -29.15 |
| 2 hours prior | 2026-09-20 07:15 | 191.35 | 220.50 | -29.15 |
| 6 hours prior | 2026-09-20 03:15 | 191.35 | 220.50 | -29.15 |
| 12 hours prior | 2026-09-19 21:15 | 191.34 | 220.50 | -29.16 |
| 24 hours prior | 2026-09-19 09:15 | 191.37 | 220.50 | -29.13 |
| 48 hours prior | 2026-09-18 09:15 | 191.38 | 220.50 | -29.12 |
*
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
