Lake Bob Sandlin: 94.5% full as of 2026-08-02
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 | 2026-08-02 | 94.5 | 336.29 | 192,536 | 181,805 | 192,417 | 8,652 |
| Yesterday | 2026-08-01 | 94.6 | 336.32 | 192,796 | 182,065 | 192,417 | 8,658 |
| 2 days ago | 2026-07-31 | 94.8 | 336.35 | 193,055 | 182,324 | 192,417 | 8,663 |
| 1 week ago | 2026-07-26 | 95.3 | 336.48 | 194,183 | 183,452 | 192,417 | 8,689 |
| 1 month ago | 2026-07-02 | 96.4 | 336.72 | 196,274 | 185,543 | 192,417 | 8,736 |
| 3 months ago | 2026-05-02 | 96.5 | 336.73 | 196,362 | 185,631 | 192,417 | 8,738 |
| 6 months ago | 2026-02-02 | 93.8 | 336.14 | 191,240 | 180,509 | 192,417 | 8,622 |
| 1 year ago | 2025-08-02 | 98.2 | 337.11 | 199,696 | 188,965 | 192,417 | 8,812 |
*
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 | 2026-08-02 04:00 | 336.29 | 337.50 | -1.21 |
| 1 hour prior | 2026-08-02 03:00 | 336.29 | 337.50 | -1.21 |
| 2 hours prior | 2026-08-02 02:00 | 336.29 | 337.50 | -1.21 |
| 6 hours prior | 2026-08-01 22:00 | 336.30 | 337.50 | -1.20 |
| 12 hours prior | 2026-08-01 16:00 | 336.31 | 337.50 | -1.19 |
| 24 hours prior | 2026-08-01 04:00 | 336.33 | 337.50 | -1.17 |
| 48 hours prior | 2026-07-31 04:00 | 336.36 | 337.50 | -1.14 |
*
Data is provisional and subject to revision.
Additional Information
| Impoundment date | 1978-01-01 |
| Vertical datum | NGVD29 |
| Dead pool elevation | 300.00 ft above NGVD29 |
| Service spillway crest elevation | 316.50 ft above NGVD29 |
| Emergency spillway crest elevation | 341.30 ft above NGVD29 |
| Maximum design elevation | 345.60 ft above NGVD29 |
| Top of dam elevation | 349.00 ft above NGVD29 |
| Conservation pool elevation | 337.50 ft above NGVD29 |
| Data download (CSV) | period of record, last one year, last 30 days |
Elevation-Area-Capacity Curves
1978-01-01 (source: USGS)
2000-10-01 (source: USGS)
2008-11-01 (source: TWDB)
: GIS Data
2018-02-01 (source: TWDB)
: GIS Data
|
|
| Data Source | USGS:07344489 |
| USGS Monitoring Location | USGS:07344489 |
Lake Location
