Fort Phantom Hill Reservoir: 72.9% full as of 2026-08-12
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 | 2026-08-12 | 72.9 | 1,630.49 | 51,080 | 51,074 | 70,030 | 3,124 |
| Yesterday | 2026-08-11 | 73.1 | 1,630.52 | 51,174 | 51,168 | 70,030 | 3,127 |
| 2 days ago | 2026-08-10 | 73.2 | 1,630.56 | 51,299 | 51,293 | 70,030 | 3,132 |
| 1 week ago | 2026-08-05 | 74.1 | 1,630.75 | 51,896 | 51,890 | 70,030 | 3,151 |
| 1 month ago | 2026-07-12 | 76.6 | 1,631.29 | 53,614 | 53,608 | 70,030 | 3,215 |
| 3 months ago | 2026-05-12 | 73.1 | 1,630.52 | 51,174 | 51,168 | 70,030 | 3,127 |
| 6 months ago | 2026-02-12 | 72.0 | 1,630.27 | 50,395 | 50,389 | 70,030 | 3,102 |
| 1 year ago | 2025-08-12 | 81.5 | 1,632.34 | 57,061 | 57,055 | 70,030 | 3,360 |
*
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 | 2026-08-12 18:30 | 1,630.46 | 1,635.90 | -5.44 |
| 1 hour prior | 2026-08-12 17:30 | 1,630.47 | 1,635.90 | -5.43 |
| 2 hours prior | 2026-08-12 16:30 | 1,630.46 | 1,635.90 | -5.44 |
| 6 hours prior | 2026-08-12 12:30 | 1,630.48 | 1,635.90 | -5.42 |
| 12 hours prior | 2026-08-12 06:30 | 1,630.48 | 1,635.90 | -5.42 |
| 24 hours prior | 2026-08-11 18:30 | 1,630.52 | 1,635.90 | -5.38 |
| 48 hours prior | 2026-08-10 18:30 | 1,630.55 | 1,635.90 | -5.35 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1938-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 1,582.40 ft above NGVD29 |
| Service spillway crest elevation | 1,635.90 ft above NGVD29 |
| Emergency spillway crest elevation | 1,642.00 ft above NGVD29 |
| Top of dam elevation | 1,650.00 ft above NGVD29 |
| Conservation pool elevation | 1,635.90 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1993-11-01 (source: TWDB)
: GIS Data
|
|
| Data Source | USGS:08083500 |
| USGS Monitoring Location | USGS:08083500 |
Lake Location
