Lake Bob Sandlin: 91.8% full as of 2026-08-29
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 | 2026-08-29 | 91.8 | 335.69 | 187,380 | 176,649 | 192,417 | 8,534 |
| Yesterday | 2026-08-28 | 91.8 | 335.70 | 187,465 | 176,734 | 192,417 | 8,536 |
| 2 days ago | 2026-08-27 | 91.9 | 335.71 | 187,551 | 176,820 | 192,417 | 8,538 |
| 1 week ago | 2026-08-22 | 92.4 | 335.83 | 188,577 | 177,846 | 192,417 | 8,562 |
| 1 month ago | 2026-07-29 | 95.0 | 336.40 | 193,489 | 182,758 | 192,417 | 8,673 |
| 3 months ago | 2026-05-29 | 96.7 | 336.78 | 196,799 | 186,068 | 192,417 | 8,748 |
| 6 months ago | 2026-02-28 | 94.0 | 336.18 | 191,585 | 180,854 | 192,417 | 8,630 |
| 1 year ago | 2025-08-29 | 97.2 | 336.88 | 197,675 | 186,944 | 192,417 | 8,767 |
*
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 | 2026-08-29 00:00 | 335.69 | 337.50 | -1.81 |
| 1 hour prior | 2026-08-28 23:00 | 335.69 | 337.50 | -1.81 |
| 2 hours prior | 2026-08-28 22:00 | 335.69 | 337.50 | -1.81 |
| 6 hours prior | 2026-08-28 18:00 | 335.69 | 337.50 | -1.81 |
| 12 hours prior | 2026-08-28 12:00 | 335.70 | 337.50 | -1.80 |
| 24 hours prior | 2026-08-28 00:00 | 335.71 | 337.50 | -1.79 |
| 48 hours prior | 2026-08-27 00:00 | 335.71 | 337.50 | -1.79 |
*
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
