Stillhouse Hollow Lake: 96.3% full as of 2026-10-29
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 | 2026-10-29 | 96.3 | 620.65 | 221,333 | 221,247 | 229,796 | 6,240 |
| Yesterday | 2026-10-28 | 96.3 | 620.66 | 221,395 | 221,309 | 229,796 | 6,241 |
| 2 days ago | 2026-10-27 | 96.4 | 620.69 | 221,582 | 221,496 | 229,796 | 6,245 |
| 1 week ago | 2026-10-22 | 96.8 | 620.85 | 222,583 | 222,497 | 229,796 | 6,265 |
| 1 month ago | 2026-09-29 | 96.2 | 620.62 | 221,145 | 221,059 | 229,796 | 6,236 |
| 3 months ago | 2026-07-29 | 100.0 | 622.75 | 234,744 | 229,796 | 229,796 | - n.a. - |
| 6 months ago | 2026-04-29 | 98.9 | 621.59 | 227,258 | 227,172 | 229,796 | 6,370 |
| 1 year ago | 2025-10-29 | 99.2 | 621.72 | 228,087 | 228,001 | 229,796 | 6,389 |
*
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 | 2026-10-29 00:00 | 620.65 | 622.00 | -1.35 |
| 1 hour prior | 2026-10-28 23:00 | 620.65 | 622.00 | -1.35 |
| 2 hours prior | 2026-10-28 22:00 | 620.65 | 622.00 | -1.35 |
| 6 hours prior | 2026-10-28 18:00 | 620.65 | 622.00 | -1.35 |
| 12 hours prior | 2026-10-28 12:00 | 620.66 | 622.00 | -1.34 |
| 24 hours prior | 2026-10-28 00:00 | 620.67 | 622.00 | -1.33 |
| 48 hours prior | 2026-10-27 00:00 | 620.70 | 622.00 | -1.30 |
*
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
