Fort Phantom Hill Reservoir: 73.5% full as of 2026-08-09
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 | 2026-08-09 | 73.5 | 1,630.61 | 51,455 | 51,449 | 70,030 | 3,137 |
| Yesterday | 2026-08-08 | 73.6 | 1,630.63 | 51,518 | 51,512 | 70,030 | 3,139 |
| 2 days ago | 2026-08-07 | 73.7 | 1,630.66 | 51,612 | 51,606 | 70,030 | 3,142 |
| 1 week ago | 2026-08-02 | 74.6 | 1,630.87 | 52,274 | 52,268 | 70,030 | 3,164 |
| 1 month ago | 2026-07-09 | 77.1 | 1,631.40 | 53,968 | 53,962 | 70,030 | 3,228 |
| 3 months ago | 2026-05-09 | 73.3 | 1,630.58 | 51,361 | 51,355 | 70,030 | 3,134 |
| 6 months ago | 2026-02-09 | 72.0 | 1,630.29 | 50,457 | 50,451 | 70,030 | 3,104 |
| 1 year ago | 2025-08-09 | 82.0 | 1,632.44 | 57,398 | 57,392 | 70,030 | 3,375 |
*
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 | 2026-08-09 08:30 | 1,630.60 | 1,635.90 | -5.30 |
| 1 hour prior | 2026-08-09 07:30 | 1,630.60 | 1,635.90 | -5.30 |
| 2 hours prior | 2026-08-09 06:30 | 1,630.60 | 1,635.90 | -5.30 |
| 6 hours prior | 2026-08-09 02:30 | 1,630.61 | 1,635.90 | -5.29 |
| 12 hours prior | 2026-08-08 20:30 | 1,630.61 | 1,635.90 | -5.29 |
| 24 hours prior | 2026-08-08 08:30 | 1,630.63 | 1,635.90 | -5.27 |
| 48 hours prior | 2026-08-07 08:30 | 1,630.66 | 1,635.90 | -5.24 |
*
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
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|
| Data Source | USGS:08083500 |
| USGS Monitoring Location | USGS:08083500 |
Lake Location
