Lake Cisco: 44.7% full as of 2026-08-17
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 | 2026-08-17 | 44.7 | 1,504.13 | 12,974 | 12,974 | 29,003 | 605 |
| Yesterday | 2026-08-16 | 44.8 | 1,504.15 | 12,986 | 12,986 | 29,003 | 605 |
| 2 days ago | 2026-08-15 | 44.8 | 1,504.18 | 13,003 | 13,003 | 29,003 | 606 |
| 1 week ago | 2026-08-10 | 45.3 | 1,504.39 | 13,126 | 13,126 | 29,003 | 610 |
| 1 month ago | 2026-07-17 | 45.9 | 1,504.71 | 13,317 | 13,317 | 29,003 | 617 |
| 3 months ago | 2026-05-17 | 47.1 | 1,505.27 | 13,647 | 13,647 | 29,003 | 630 |
| 6 months ago | 2026-02-17 | 48.1 | 1,505.76 | 13,950 | 13,950 | 29,003 | 641 |
| 1 year ago | 2025-08-17 | 53.5 | 1,508.01 | 15,520 | 15,520 | 29,003 | 692 |
*
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 | 2026-08-17 21:30 | 1,504.11 | 1,522.46 | -18.35 |
| 1 hour prior | 2026-08-17 20:30 | 1,504.09 | 1,522.46 | -18.37 |
| 2 hours prior | 2026-08-17 19:30 | 1,504.12 | 1,522.46 | -18.34 |
| 6 hours prior | 2026-08-17 15:30 | 1,504.14 | 1,522.46 | -18.32 |
| 12 hours prior | 2026-08-17 09:30 | 1,504.13 | 1,522.46 | -18.33 |
| 24 hours prior | 2026-08-16 21:30 | 1,504.14 | 1,522.46 | -18.32 |
| 48 hours prior | 2026-08-15 21:30 | 1,504.16 | 1,522.46 | -18.30 |
*
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
