New Terrell City Lake: 24.2% full as of 2026-09-25
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 | 2026-09-25 | 24.2 | 493.40 | 2,087 | 2,076 | 8,583 | 358 |
| Yesterday | 2026-09-24 | 24.2 | 493.41 | 2,090 | 2,079 | 8,583 | 359 |
| 2 days ago | 2026-09-23 | 24.4 | 493.44 | 2,101 | 2,090 | 8,583 | 360 |
| 1 week ago | 2026-09-18 | 24.9 | 493.56 | 2,144 | 2,133 | 8,583 | 363 |
| 1 month ago | 2026-08-25 | 26.8 | 494.01 | 2,311 | 2,300 | 8,583 | 378 |
| 3 months ago | 2026-06-25 | 33.8 | 495.48 | 2,910 | 2,899 | 8,583 | 440 |
| 6 months ago | 2026-03-25 | 27.6 | 494.19 | 2,380 | 2,369 | 8,583 | 384 |
| 1 year ago | 2025-09-25 | 26.8 | 494.00 | 2,307 | 2,296 | 8,583 | 378 |
*
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 | 2026-09-25 15:30 | 493.38 | 504.00 | -10.62 |
| 1 hour prior | 2026-09-25 14:30 | 493.41 | 504.00 | -10.59 |
| 2 hours prior | 2026-09-25 13:30 | 493.38 | 504.00 | -10.62 |
| 6 hours prior | 2026-09-25 09:30 | 493.38 | 504.00 | -10.62 |
| 12 hours prior | 2026-09-25 03:30 | 493.39 | 504.00 | -10.61 |
| 24 hours prior | 2026-09-24 15:30 | 493.41 | 504.00 | -10.59 |
| 48 hours prior | 2026-09-23 15:30 | 493.43 | 504.00 | -10.57 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1955-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 481.00 ft above NGVD29 |
| Service spillway crest elevation | 508.80 ft above NGVD29 |
| Emergency spillway crest elevation | 509.80 ft above NGVD29 |
| Top of dam elevation | 514.20 ft above NGVD29 |
|
Conservation pool elevation |
504.00 ft above NGVD29 |
|
Conservation pool elevation |
504.00 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1997-05-01 (source: TWDB)
: GIS Data
|
|
| Data Source | USGS:08062730 |
| USGS Monitoring Location | USGS:08062730 |
Lake Location
