Fort Phantom Hill Reservoir: 69.5% full as of 2026-09-01
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 | 2026-09-01 | 69.5 | 1,629.70 | 48,645 | 48,639 | 70,030 | 3,038 |
| 1 day prior | 2026-08-31 | 69.6 | 1,629.74 | 48,767 | 48,761 | 70,030 | 3,042 |
| 2 days prior | 2026-08-30 | 69.8 | 1,629.78 | 48,888 | 48,882 | 70,030 | 3,046 |
| 1 week prior | 2026-08-25 | 70.5 | 1,629.95 | 49,408 | 49,402 | 70,030 | 3,066 |
| 1 month prior | 2026-08-01 | 74.8 | 1,630.90 | 52,369 | 52,363 | 70,030 | 3,167 |
| 3 months prior | 2026-06-01 | 72.1 | 1,630.30 | 50,488 | 50,482 | 70,030 | 3,105 |
| 6 months prior | 2026-03-01 | 71.6 | 1,630.19 | 50,147 | 50,141 | 70,030 | 3,094 |
| 1 year prior | 2025-09-01 | 79.2 | 1,631.86 | 55,466 | 55,460 | 70,030 | 3,286 |
*
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 | 2026-09-01 23:30 | 1,629.68 | 1,635.90 | -6.22 |
| 1 hour prior | 2026-09-01 22:30 | 1,629.67 | 1,635.90 | -6.23 |
| 2 hours prior | 2026-09-01 21:30 | 1,629.68 | 1,635.90 | -6.22 |
| 6 hours prior | 2026-09-01 17:30 | 1,629.69 | 1,635.90 | -6.21 |
| 12 hours prior | 2026-09-01 11:30 | 1,629.70 | 1,635.90 | -6.20 |
| 24 hours prior | 2026-08-31 23:30 | 1,629.72 | 1,635.90 | -6.18 |
| 48 hours prior | 2026-08-30 23:30 | 1,629.76 | 1,635.90 | -6.14 |
*
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
