Stillhouse Hollow Lake: 96.0% full as of 2026-11-02
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 | 2026-11-02 | 96.0 | 620.56 | 220,771 | 220,685 | 229,796 | 6,228 |
| Yesterday | 2026-11-01 | 96.1 | 620.58 | 220,896 | 220,810 | 229,796 | 6,231 |
| 2 days ago | 2026-10-31 | 96.1 | 620.60 | 221,021 | 220,935 | 229,796 | 6,233 |
| 1 week ago | 2026-10-26 | 96.5 | 620.72 | 221,770 | 221,684 | 229,796 | 6,249 |
| 1 month ago | 2026-10-02 | 96.7 | 620.79 | 222,207 | 222,121 | 229,796 | 6,258 |
| 3 months ago | 2026-08-02 | 100.0 | 622.47 | 232,919 | 229,796 | 229,796 | - n.a. - |
| 6 months ago | 2026-05-02 | 100.0 | 621.99 | 229,817 | 229,731 | 229,796 | 6,428 |
| 1 year ago | 2025-11-02 | 98.8 | 621.57 | 227,130 | 227,044 | 229,796 | 6,367 |
*
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 | 2026-11-02 13:00 | 620.55 | 622.00 | -1.45 |
| 1 hour prior | 2026-11-02 12:00 | 620.56 | 622.00 | -1.44 |
| 2 hours prior | 2026-11-02 11:00 | 620.56 | 622.00 | -1.44 |
| 6 hours prior | 2026-11-02 07:00 | 620.56 | 622.00 | -1.44 |
| 12 hours prior | 2026-11-02 01:00 | 620.56 | 622.00 | -1.44 |
| 24 hours prior | 2026-11-01 13:00 | 620.57 | 622.00 | -1.43 |
| 48 hours prior | 2026-10-31 13:00 | 620.60 | 622.00 | -1.40 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1968-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 515.00 ft above NGVD29 |
| Emergency spillway crest elevation | 666.00 ft above NGVD29 |
| Flood pool elevation | 666.00 ft above NGVD29 |
| Maximum design elevation | 693.20 ft above NGVD29 |
| Top of dam elevation | 698.00 ft above NGVD29 |
| Conservation pool elevation | 622.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1968-01-01 (source: USGS)
1995-05-01 (source: TWDB)
: GIS Data
2005-05-01 (source: TWDB)
: GIS Data
2015-12-01 (source: TWDB)
: GIS Data
|
|
| Data Source | USGS:08104050 |
| USGS Monitoring Location | USGS:08104050 |
Lake Location
