Lake Bob Sandlin: 92.4% full as of 2026-08-22
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 | 2026-08-22 | 92.4 | 335.83 | 188,577 | 177,846 | 192,417 | 8,562 |
| Yesterday | 2026-08-21 | 92.5 | 335.85 | 188,748 | 178,017 | 192,417 | 8,566 |
| 2 days ago | 2026-08-20 | 92.6 | 335.87 | 188,919 | 178,188 | 192,417 | 8,570 |
| 1 week ago | 2026-08-15 | 93.2 | 336.00 | 190,035 | 179,304 | 192,417 | 8,595 |
| 1 month ago | 2026-07-22 | 95.8 | 336.58 | 195,053 | 184,322 | 192,417 | 8,708 |
| 3 months ago | 2026-05-22 | 96.2 | 336.67 | 195,838 | 185,107 | 192,417 | 8,726 |
| 6 months ago | 2026-02-22 | 94.2 | 336.22 | 191,931 | 181,200 | 192,417 | 8,638 |
| 1 year ago | 2025-08-22 | 96.8 | 336.81 | 197,061 | 186,330 | 192,417 | 8,753 |
*
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 | 2026-08-22 16:00 | 335.82 | 337.50 | -1.68 |
| 1 hour prior | 2026-08-22 15:00 | 335.82 | 337.50 | -1.68 |
| 2 hours prior | 2026-08-22 14:00 | 335.83 | 337.50 | -1.67 |
| 6 hours prior | 2026-08-22 10:00 | 335.83 | 337.50 | -1.67 |
| 12 hours prior | 2026-08-22 04:00 | 335.83 | 337.50 | -1.67 |
| 24 hours prior | 2026-08-21 16:00 | 335.84 | 337.50 | -1.66 |
| 48 hours prior | 2026-08-20 16:00 | 335.87 | 337.50 | -1.63 |
*
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
