New Terrell City Lake: 25.3% full as of 2026-09-11
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 | 2026-09-11 | 25.3 | 493.67 | 2,185 | 2,174 | 8,583 | 367 |
| Yesterday | 2026-09-10 | 25.3 | 493.67 | 2,185 | 2,174 | 8,583 | 367 |
| 2 days ago | 2026-09-09 | 25.4 | 493.69 | 2,192 | 2,181 | 8,583 | 367 |
| 1 week ago | 2026-09-04 | 25.8 | 493.79 | 2,229 | 2,218 | 8,583 | 371 |
| 1 month ago | 2026-08-11 | 28.3 | 494.35 | 2,442 | 2,431 | 8,583 | 390 |
| 3 months ago | 2026-06-11 | 34.4 | 495.61 | 2,967 | 2,956 | 8,583 | 448 |
| 6 months ago | 2026-03-11 | 27.7 | 494.21 | 2,388 | 2,377 | 8,583 | 385 |
| 1 year ago | 2025-09-11 | 27.7 | 494.21 | 2,388 | 2,377 | 8,583 | 385 |
*
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 | 2026-09-11 03:30 | 493.67 | 504.00 | -10.33 |
| 1 hour prior | 2026-09-11 02:30 | 493.67 | 504.00 | -10.33 |
| 2 hours prior | 2026-09-11 01:30 | 493.67 | 504.00 | -10.33 |
| 6 hours prior | 2026-09-10 21:30 | 493.67 | 504.00 | -10.33 |
| 12 hours prior | 2026-09-10 15:30 | 493.68 | 504.00 | -10.32 |
| 24 hours prior | 2026-09-10 03:30 | 493.69 | 504.00 | -10.31 |
| 48 hours prior | 2026-09-09 03:30 | 493.71 | 504.00 | -10.29 |
*
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
