Fort Phantom Hill Reservoir: 66.5% full as of 2026-09-21
Historical Data
| Date | Percent Full |
Mean Water Level (ft) |
Reservoir Storage (acre-ft) |
Conservation Storage (acre-ft) |
Conservation Capacity (acre-ft) |
Surface Area (acres) |
|
|---|---|---|---|---|---|---|---|
| Most recent | 2026-09-21 | 66.5 | 1,629.01 | 46,572 | 46,566 | 70,030 | 2,970 |
| 1 day prior | 2026-09-20 | 66.6 | 1,629.04 | 46,661 | 46,655 | 70,030 | 2,973 |
| 2 days prior | 2026-09-19 | 66.7 | 1,629.07 | 46,751 | 46,745 | 70,030 | 2,976 |
| 1 week prior | 2026-09-14 | 67.6 | 1,629.27 | 47,348 | 47,342 | 70,030 | 2,996 |
| 1 month prior | 2026-08-21 | 71.2 | 1,630.10 | 49,869 | 49,863 | 70,030 | 3,084 |
| 3 months prior | 2026-06-21 | 78.0 | 1,631.61 | 54,649 | 54,643 | 70,030 | 3,254 |
| 6 months prior | 2026-03-21 | 72.2 | 1,630.32 | 50,550 | 50,544 | 70,030 | 3,107 |
| 1 year prior | 2025-09-21 | 76.9 | 1,631.37 | 53,871 | 53,865 | 70,030 | 3,224 |
*
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 | 2026-09-21 23:30 | 1,628.99 | 1,635.90 | -6.91 |
| 1 hour prior | 2026-09-21 22:30 | 1,628.99 | 1,635.90 | -6.91 |
| 2 hours prior | 2026-09-21 21:30 | 1,628.99 | 1,635.90 | -6.91 |
| 6 hours prior | 2026-09-21 17:30 | 1,629.02 | 1,635.90 | -6.88 |
| 12 hours prior | 2026-09-21 11:30 | 1,629.02 | 1,635.90 | -6.88 |
| 24 hours prior | 2026-09-20 23:30 | 1,629.03 | 1,635.90 | -6.87 |
| 48 hours prior | 2026-09-19 23:30 | 1,629.06 | 1,635.90 | -6.84 |
*
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
