Stillhouse Hollow Lake: 96.3% full as of 2026-10-02
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 | 2026-10-02 | 96.3 | 620.66 | 221,395 | 221,309 | 229,796 | 6,241 |
| Yesterday | 2026-10-01 | 96.2 | 620.61 | 221,083 | 220,997 | 229,796 | 6,235 |
| 2 days ago | 2026-09-30 | 96.1 | 620.58 | 220,896 | 220,810 | 229,796 | 6,231 |
| 1 week ago | 2026-09-25 | 96.6 | 620.78 | 222,145 | 222,059 | 229,796 | 6,256 |
| 1 month ago | 2026-09-02 | 98.5 | 621.47 | 226,494 | 226,408 | 229,796 | 6,353 |
| 3 months ago | 2026-07-02 | 100.0 | 623.51 | 239,755 | 229,796 | 229,796 | - n.a. - |
| 6 months ago | 2026-04-02 | 92.8 | 619.37 | 213,451 | 213,365 | 229,796 | 6,073 |
| 1 year ago | 2025-10-02 | 99.9 | 621.96 | 229,625 | 229,539 | 229,796 | 6,424 |
*
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 | 2026-10-02 00:00 | 620.66 | 622.00 | -1.34 |
| 1 hour prior | 2026-10-01 23:00 | 620.66 | 622.00 | -1.34 |
| 2 hours prior | 2026-10-01 22:00 | 620.66 | 622.00 | -1.34 |
| 6 hours prior | 2026-10-01 18:00 | 620.66 | 622.00 | -1.34 |
| 12 hours prior | 2026-10-01 12:00 | 620.60 | 622.00 | -1.40 |
| 24 hours prior | 2026-10-01 00:00 | 620.56 | 622.00 | -1.44 |
| 48 hours prior | 2026-09-30 00:00 | 620.59 | 622.00 | -1.41 |
*
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
