New Terrell City Lake: 27.2% full as of 2026-08-21
Historical Data
| Date | Percent Full |
Mean Water Level (ft) |
Reservoir Storage (acre-ft) |
Conservation Storage (acre-ft) |
Conservation Capacity (acre-ft) |
Surface Area (acres) |
|
|---|---|---|---|---|---|---|---|
| Today | 2026-08-21 | 27.2 | 494.10 | 2,345 | 2,334 | 8,583 | 381 |
| Yesterday | 2026-08-20 | 27.2 | 494.11 | 2,349 | 2,338 | 8,583 | 382 |
| 2 days ago | 2026-08-19 | 27.4 | 494.14 | 2,361 | 2,350 | 8,583 | 383 |
| 1 week ago | 2026-08-14 | 27.9 | 494.26 | 2,407 | 2,396 | 8,583 | 387 |
| 1 month ago | 2026-07-21 | 30.8 | 494.89 | 2,658 | 2,647 | 8,583 | 412 |
| 3 months ago | 2026-05-21 | 27.3 | 494.13 | 2,357 | 2,346 | 8,583 | 382 |
| 6 months ago | 2026-02-21 | 24.7 | 493.53 | 2,133 | 2,122 | 8,583 | 362 |
| 1 year ago | 2025-08-21 | 27.5 | 494.17 | 2,372 | 2,361 | 8,583 | 384 |
*
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 | 2026-08-21 16:30 | 494.09 | 504.00 | -9.91 |
| 1 hour prior | 2026-08-21 15:30 | 494.07 | 504.00 | -9.93 |
| 2 hours prior | 2026-08-21 14:30 | 494.09 | 504.00 | -9.91 |
| 6 hours prior | 2026-08-21 10:30 | 494.08 | 504.00 | -9.92 |
| 12 hours prior | 2026-08-21 04:30 | 494.10 | 504.00 | -9.90 |
| 24 hours prior | 2026-08-20 16:30 | 494.11 | 504.00 | -9.89 |
| 48 hours prior | 2026-08-19 16:30 | 494.14 | 504.00 | -9.86 |
*
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
