Stillhouse Hollow Lake: 95.9% full as of 2026-11-11
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 | 2026-11-11 | 95.9 | 620.51 | 220,460 | 220,374 | 229,796 | 6,222 |
| Yesterday | 2026-11-10 | 95.9 | 620.51 | 220,460 | 220,374 | 229,796 | 6,222 |
| 2 days ago | 2026-11-09 | 95.9 | 620.51 | 220,460 | 220,374 | 229,796 | 6,222 |
| 1 week ago | 2026-11-04 | 96.0 | 620.56 | 220,771 | 220,685 | 229,796 | 6,228 |
| 1 month ago | 2026-10-11 | 98.1 | 621.30 | 225,416 | 225,330 | 229,796 | 6,328 |
| 3 months ago | 2026-08-11 | 100.0 | 622.07 | 230,332 | 229,796 | 229,796 | 6,440 |
| 6 months ago | 2026-05-11 | 100.0 | 622.68 | 234,287 | 229,796 | 229,796 | - n.a. - |
| 1 year ago | 2025-11-11 | 98.0 | 621.29 | 225,353 | 225,267 | 229,796 | 6,327 |
*
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 | 2026-11-11 08:00 | 620.51 | 622.00 | -1.49 |
| 1 hour prior | 2026-11-11 07:00 | 620.51 | 622.00 | -1.49 |
| 2 hours prior | 2026-11-11 06:00 | 620.51 | 622.00 | -1.49 |
| 6 hours prior | 2026-11-11 02:00 | 620.51 | 622.00 | -1.49 |
| 12 hours prior | 2026-11-10 20:00 | 620.51 | 622.00 | -1.49 |
| 24 hours prior | 2026-11-10 08:00 | 620.52 | 622.00 | -1.48 |
| 48 hours prior | 2026-11-09 08:00 | 620.51 | 622.00 | -1.49 |
*
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
