Lake Cisco: 42.5% full as of 2026-10-20
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 | 2026-10-20 | 42.5 | 1,503.00 | 12,316 | 12,316 | 29,003 | 579 |
| Yesterday | 2026-10-19 | 42.5 | 1,503.02 | 12,328 | 12,328 | 29,003 | 579 |
| 2 days ago | 2026-10-18 | 42.5 | 1,503.04 | 12,340 | 12,340 | 29,003 | 580 |
| 1 week ago | 2026-10-13 | 42.4 | 1,502.95 | 12,287 | 12,287 | 29,003 | 578 |
| 1 month ago | 2026-09-20 | 42.8 | 1,503.19 | 12,427 | 12,427 | 29,003 | 583 |
| 3 months ago | 2026-07-20 | 45.8 | 1,504.66 | 13,287 | 13,287 | 29,003 | 616 |
| 6 months ago | 2026-04-20 | 47.8 | 1,505.64 | 13,874 | 13,874 | 29,003 | 639 |
| 1 year ago | 2025-10-20 | 50.1 | 1,506.68 | 14,544 | 14,544 | 29,003 | 662 |
*
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 | 2026-10-20 07:30 | 1,502.99 | 1,522.46 | -19.47 |
| 1 hour prior | 2026-10-20 06:30 | 1,502.99 | 1,522.46 | -19.47 |
| 2 hours prior | 2026-10-20 05:30 | 1,503.00 | 1,522.46 | -19.46 |
| 6 hours prior | 2026-10-20 01:30 | 1,503.00 | 1,522.46 | -19.46 |
| 12 hours prior | 2026-10-19 19:30 | 1,503.01 | 1,522.46 | -19.45 |
| 24 hours prior | 2026-10-19 07:30 | 1,503.02 | 1,522.46 | -19.44 |
| 48 hours prior | 2026-10-18 07:30 | 1,503.04 | 1,522.46 | -19.42 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1923-01-01 |
| Vertical datum | NGVD29 |
| Service spillway crest elevation | 1,522.46 ft above NGVD29 |
| Top of dam elevation | 1,528.50 ft above NGVD29 |
|
Conservation pool elevation |
1,522.46 ft above NGVD29 |
|
Conservation pool elevation |
1,496.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1974-10-01 (source: TWDB)
|
|
| Data Source | USGS:08086215 |
| USGS Monitoring Location | USGS:08086215 |
Lake Location
